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From: Bruce Evans <brde@optusnet.com.au>
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Subject: RE: ifconfig creates a bogus(?) route
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> Bruce Evans wrote:
>> Sometime between r191220 and r201220, ifconfig started creating a bogus(?) static route.
>> The following is under r248255 with "ifconfig em0 inet 192.168.2.8" (where 192.168.2.8 is
>> for the local host and I don't bother typing the netmsk) done before bringing up lo0:
>>
>> Routing tables
>>
>> Internet:
>> Destination Gateway Flags Refs Use Netif Expire
>> 192.168.2.0/24 link#1 U 0 0 em0
>> 192.168.2.8 link#1 UHS 0 0 lo0
>
> Why do you feel the route is bogus? Is it because it has a netmask?
It is the second route that is bogus(?). It is bogus(?) because:
(a) it is a new "feature" in some version between r191220 and r201220
(b) it is not needed (the defaults work)
(c) it doesn't work (it breaks working of the defaults)
(d) it produces a route to an unconfigured interface (lo0) when lo0
happens to be configured after em0.
It is bogus(?) instead of bogus since it actually looks correct.
Utilities obfuscate this a little by not displaying enough raw state
and by displaying the state differently (even with -n).
The bug seems to be just (d) combined with (a). Before (a), the order
of bringing up interfaces didn't matter. After (a), lo0 must be brought
up first because (d) doesn't do all the initialization required for the
unconfigured lo0 and bringing up lo0 later gives an inconsistent state.
I use network_interfaces=<explicit alpha-sorted list> and this happens to
give an order with after the primary NIC interface in some cases. The
default is network_interfaces="auto". This starts with the ifconfig -l
order which seems to always put lo0 _last_. However, r149726 moves lo0
first for unstated reasons. Thus most installations don't see the bug.
I would have seen it even if I used auto since my userland is older than
r149726.
> If you don't supply a netmask, ifconfig will assume one based on the "class" (A, B, C) of the IP you've supplied. 192.168.2.8 is a Class C address and gets a /24 netmask by default.
Yes, I didn't bother typing one partly because I know that the default is
right for em0 and almost anything works for lo0.
>> The bogus(?) route points to itself (route get shows this more clearly), and doesn't work.
>> I know little about routiing, but can > fix things like this manually. Simply "route delete"
>> on the bogus(?) route works in this case. An alias for lo0 also works.
>
> In router parlance, the route would be called a "connected" route, showing that not only do you have an IP on the subnet, but by virtue of the netmask, you are "connected" to every other IP in the same subnet range, through that interface. It will cause your system to send ARP requests through that interface for any other IP in the range, in order to communicate with them.
I still haven't figured out how to set up the bogus(?) route using route
add/change, but can now complete the initialization using a "route change"
that appears to be null:
Test script:
X # Try to kill all old interfaces and routes, if any:
X ifconfig em0 inet 0
X ifconfig lo0 inet 0
X netstat -rn
X
X # (Re)initialize in the broken order:
X ifconfig em0 inet 192.168.2.8
X ifconfig lo0 inet 127.0.1
X netstat -rn
X route -n get 192.168.2.8
X
X # Fix up the initialization with a null change:
X route change -iface 192.168.2.8 192.168.2.8
X netstat -rn
X route -n get 192.168.2.8
X
X # This ping works after the fixup, or with the opposite init order:
X ping -c1 192.168.2.8
Output:
Routing tables
Y Internet:
Y Destination Gateway Flags Refs Use Netif Expire
Y Routing tables
Y
Y Internet:
Y Destination Gateway Flags Refs Use Netif Expire
Y 127.0.0.1 link#2 UH 0 0 lo0
Y 192.168.2.0/24 link#1 U 0 0 em0
Y 192.168.2.8 link#1 UHS 0 0 lo0
Y route to: 192.168.2.8
Y destination: 192.168.2.8
Y interface: lo0
Y flags: <UP,HOST,DONE,STATIC>
Y recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
Y 0 0 0 0 0 0 16384 0
Y change host 192.168.2.8: gateway 192.168.2.8
Y Routing tables
Y
Y Internet:
Y Destination Gateway Flags Refs Use Netif Expire
Y 127.0.0.1 link#2 UH 0 0 lo0
Y 192.168.2.0/24 link#1 U 0 0 em0
Y 192.168.2.8 192.168.2.8 UHS 0 0 lo0
Y route to: 192.168.2.8
Y destination: 192.168.2.8
Y interface: lo0
Y flags: <UP,HOST,DONE,STATIC>
Y recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
Y 0 0 0 0 0 0 16384 0
Y PING 192.168.2.8 (192.168.2.8): 56 data bytes
Y 64 bytes from 192.168.2.8: icmp_seq=0 ttl=64 time=0.005 ms
Y
Y --- 192.168.2.8 ping statistics ---
Y 1 packets transmitted, 1 packets received, 0% packet loss
Y round-trip min/avg/max/stddev = 0.005/0.005/0.005/0.000 ms
Note that the "null" route change just echos the current setting and it
doesn't change anything according to netstat -rn and route -n, but it
fixes up some internal state so that the ping works. When ping works,
tcpdump shows it going from 127.0.0.1 to 192.168.2.8 and coming back as
expected. When ping hangs, tcpdump shows it going from 0.0.0.0 to
192.168.2.8 and never coming back. The default route doesn't exist in
either case.
I still get confused using route(8). For the apparently-null fixup, it
is necessary to use -iface. The fixup
"route change 192.168.2.8 192.168.2.8" also works, but it is not a null
change although it looks even more like one. It changes the Gateway
according to netstat -rn from link#1 to 192.168.2.8 but doesn't change
anything according to route -n get. "G" is not in flags so the Gateway
is fairly bogus and is not displayed by route -n get, but something
critical changed so it is a bug to not display any changes. link#1 vs
192.168.2.8 shows the difference in a cryptic way.
Anyway, I can fix my original problem by unsorting network_interfaces.
network_interfaces is documented in rc.conf(5). Ordering requirements
for it don't seem to be mentioned there. It has no examples there.
Examples in other man pages put lo0 first.
Bruce
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From: Bruce Evans <brde@optusnet.com.au>
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To: Bruce Evans <brde@optusnet.com.au>
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Subject: RE: ifconfig creates a bogus(?) route
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On Sun, 29 May 2016, Bruce Evans wrote:
> ...
> I still haven't figured out how to set up the bogus(?) route using route
> add/change, but can now complete the initialization using a "route change"
> that appears to be null:
>
> Test script:
> ...
> X # Fix up the initialization with a null change:
> X route change -iface 192.168.2.8 192.168.2.8
> X netstat -rn
Before:
>...
> Y Destination Gateway Flags Refs Use Netif Expire
> Y 127.0.0.1 link#2 UH 0 0 lo0
> Y 192.168.2.0/24 link#1 U 0 0 em0
> Y 192.168.2.8 link#1 UHS 0 0 lo0
> Y route to: 192.168.2.8
> Y destination: 192.168.2.8
> Y interface: lo0
> Y flags: <UP,HOST,DONE,STATIC>
>...
After:
>...
> Y Destination Gateway Flags Refs Use Netif Expire
> Y 127.0.0.1 link#2 UH 0 0 lo0
> Y 192.168.2.0/24 link#1 U 0 0 em0
> Y 192.168.2.8 192.168.2.8 UHS 0 0 lo0
> Y route to: 192.168.2.8
> Y destination: 192.168.2.8
> Y interface: lo0
> Y flags: <UP,HOST,DONE,STATIC>
>...
> Note that the "null" route change just echos the current setting and it
> doesn't change anything according to netstat -rn and route -n, but it
> fixes up some internal state so that the ping works. When ping works,
> tcpdump shows it going from 127.0.0.1 to 192.168.2.8 and coming back as
> expected. When ping hangs, tcpdump shows it going from 0.0.0.0 to
> 192.168.2.8 and never coming back. The default route doesn't exist in
> either case.
Bah, it did change (from link#1 to 192.168.2.8 for Gateway in netstat -rn
output only). -iface makes no difference (I thought it prevented this
change).
The initialization bug has something to do with the magic default route
of 0.0.0.0). When lo0 is used uninitialized, it is still initialized
to 0 and the 0 gets copied to somewhere not shown properly in the
initial route from (or is it to?) 192.168.2.8. netstat -rn translates
this 0 together with another address to #link1, but route -n get
doesn't show it. I think this configuration is supposed to not occur.
I couldn't find a way to get back it using route(8) after fixing it.
When lo0 is brought up first, different magic obscures what is
happening. E.g., when lo0 is misconfigured with "inet 127.0.0.127",
the em0 route is auto-configured with this strange lo0 address instead
of completely misconfigured to 0. Neither netstat -rn nor route -n
get displays this clearly (they give the same display as in the
uninitialized case except for the .127 route). Then if lo0 is
ifconfig'ed again to fix this misconfiguration, the all routes related
to the old lo0 (bogus or working) are deleted and not restored. But
if lo0 is brought up for the first time after em0, the the 0.0.0.0
route related to the old lo0 is not deleted; it keeps breaking things.
Bruce
From owner-freebsd-net@freebsd.org Sun May 29 21:00:02 2016
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Subject: Problem reports for freebsd-net@FreeBSD.org that need special
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Date: Sun, 29 May 2016 21:00:02 +0000
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To view an individual PR, use:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=(Bug Id).
The following is a listing of current problems submitted by FreeBSD users,
which need special attention. These represent problem reports covering
all versions including experimental development code and obsolete releases.
Status | Bug Id | Description
------------+-----------+---------------------------------------------------
In Progress | 193452 | Dell PowerEdge 210 II -- Kernel panic bce (broadc
In Progress | 203422 | mpd/ppoe not working with re(4) with revision 285
In Progress | 206581 | bxe_ioctl_nvram handler is faulty
New | 204438 | setsockopt() handling of kern.ipc.maxsockbuf limi
New | 205592 | TCP processing in IPSec causes kernel panic
New | 206053 | kqueue support code of netmap causes panic
Open | 148807 | [panic] 8.1-RELEASE/10.1-STABLE "panic: sbdrop" a
Open | 194485 | Userland cannot add IPv6 prefix routes
Open | 194515 | Fatal Trap 12 Kernel with vimage
Open | 199136 | [if_tap] Added down_on_close sysctl variable to t
Open | 206544 | sendmsg(2) (sendto(2) too?) can fail with EINVAL;
11 problems total for which you should take action.
From owner-freebsd-net@freebsd.org Mon May 30 00:02:23 2016
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To: freebsd-net@freebsd.org
From: Yuri <yuri@rawbw.com>
Subject: Is there a way to keep an account of which processes generate how
much network traffic?
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There is vnstat that does this by interface.
But is there a way to do this by the application? This is because nearly
every packet that is sent through the system is sent on behalf of some
process running on the system.
It would be nice to be able to see which applications (in general sense)
generate most traffic.
I am fully aware that the link between pid and an "application" is vague
because some processes are run through some cryptic command lines. I am
just interested if anything exists in this area at all.
Yuri
From owner-freebsd-net@freebsd.org Mon May 30 00:50:34 2016
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Subject: Re: ifconfig creates a bogus(?) route
From: Kevin Oberman <rkoberman@gmail.com>
To: Bruce Evans <brde@optusnet.com.au>
Cc: David DeSimone <ddesimone@verio.net>, "net@freebsd.org" <net@freebsd.org>
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On Sun, May 29, 2016 at 12:12 AM, Bruce Evans <brde@optusnet.com.au> wrote:
> On Sun, 29 May 2016, Bruce Evans wrote:
>
> ...
>> I still haven't figured out how to set up the bogus(?) route using route
>> add/change, but can now complete the initialization using a "route change"
>> that appears to be null:
>>
>> Test script:
>> ...
>> X # Fix up the initialization with a null change:
>> X route change -iface 192.168.2.8 192.168.2.8
>> X netstat -rn
>>
>
> Before:
>
>> ...
>> Y Destination Gateway Flags Refs Use Netif
>> Expire
>> Y 127.0.0.1 link#2 UH 0 0 lo0
>> Y 192.168.2.0/24 link#1 U 0 0 em0
>> Y 192.168.2.8 link#1 UHS 0 0 lo0
>> Y route to: 192.168.2.8
>> Y destination: 192.168.2.8
>> Y interface: lo0
>> Y flags: <UP,HOST,DONE,STATIC>
>> ...
>>
>
> After:
>
>> ...
>> Y Destination Gateway Flags Refs Use Netif
>> Expire
>> Y 127.0.0.1 link#2 UH 0 0 lo0
>> Y 192.168.2.0/24 link#1 U 0 0 em0
>> Y 192.168.2.8 192.168.2.8 UHS 0 0 lo0
>> Y route to: 192.168.2.8
>> Y destination: 192.168.2.8
>> Y interface: lo0
>> Y flags: <UP,HOST,DONE,STATIC>
>> ...
>> Note that the "null" route change just echos the current setting and it
>> doesn't change anything according to netstat -rn and route -n, but it
>> fixes up some internal state so that the ping works. When ping works,
>> tcpdump shows it going from 127.0.0.1 to 192.168.2.8 and coming back as
>> expected. When ping hangs, tcpdump shows it going from 0.0.0.0 to
>> 192.168.2.8 and never coming back. The default route doesn't exist in
>> either case.
>>
>
> Bah, it did change (from link#1 to 192.168.2.8 for Gateway in netstat -rn
> output only). -iface makes no difference (I thought it prevented this
> change).
>
> The initialization bug has something to do with the magic default route
> of 0.0.0.0). When lo0 is used uninitialized, it is still initialized
> to 0 and the 0 gets copied to somewhere not shown properly in the
> initial route from (or is it to?) 192.168.2.8. netstat -rn translates
> this 0 together with another address to #link1, but route -n get
> doesn't show it. I think this configuration is supposed to not occur.
> I couldn't find a way to get back it using route(8) after fixing it.
>
> When lo0 is brought up first, different magic obscures what is
> happening. E.g., when lo0 is misconfigured with "inet 127.0.0.127",
> the em0 route is auto-configured with this strange lo0 address instead
> of completely misconfigured to 0. Neither netstat -rn nor route -n
> get displays this clearly (they give the same display as in the
> uninitialized case except for the .127 route). Then if lo0 is
> ifconfig'ed again to fix this misconfiguration, the all routes related
> to the old lo0 (bogus or working) are deleted and not restored. But
> if lo0 is brought up for the first time after em0, the the 0.0.0.0
> route related to the old lo0 is not deleted; it keeps breaking things.
>
>
> Bruce
>
Bruce,
When it is in the "broken" condition, what is the output of "route -n get
0"?
So you have a default route? None appears in any of your messages. Normally
0 should route to default. In fact 0/0 is a definition of default. (Well, I
suppose anything/0 is default, but 0/0 is the normal representation.) Since
most systems have a default gateway defined, this may relate to the issue
you are seeing. I'm very unclear what happens with 0/0 if default is not
defined.
FWIW, here is what I see on this system (10.3-STABLE r299096):
Routing tables
Internet:
Destination Gateway Flags Netif Expire
default 192.168.1.1 UGS re0
127.0.0.1 link#2 UH lo0
192.168.1.0/24 link#1 U re0
192.168.1.16 link#1 UHS lo0
--
Kevin Oberman, Part time kid herder and retired Network Engineer
E-mail: rkoberman@gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683
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From owner-freebsd-net@freebsd.org Mon May 30 05:18:26 2016
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Subject: Re: Bridge interface and ARP traffic
To: John Nielsen <lists@jnielsen.net>, Aqz <poczta@aquaz.eu>
References: <CACz0+RFx7jq+DVSwvPUdnHH0UkomYsCgpYqNr+RrF6iZNuXA8Q@mail.gmail.com>
<9746AF3A-3440-4277-9D25-E78B04A35A6D@jnielsen.net>
Cc: freebsd-net@freebsd.org
From: Julian Elischer <julian@freebsd.org>
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Date: Mon, 30 May 2016 13:18:12 +0800
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On 27/05/2016 1:13 AM, John Nielsen wrote:
>> On May 20, 2016, at 12:30 AM, Aqz <poczta@aquaz.eu> wrote:
>>
>> Hello,
>>
>> I have a very strange issue with passing ARP traffic through bridge
>> interface.
>> I'm using FreeBSD 10.3-REL VMWare virtual machine as bridge between two
>> networks using the same IP address space. Bridge interface doesn't have IP
>> address assigned so it acts more like a switch between those two virtual
>> networks - let's call them NET and PUB.
>> Gateway for our network is in NET vlan, all the virtual machines are in the
>> PUB vlan.
>>
>> Traffic passes through this bridge, but there are few problems.
>>
>> I have to manually add static ARP table entries for gateway on all the
>> machines in PUB network - I can see ARP broadcasts from machines asking
>> where's the gateway, and the reply but only on one of bridged interfaces -
>> the one from NET side. The response is not visible on bridge interface, nor
>> the PUB vlan interface.
>>
>> Also, when I try to ping a machine that's in NET network from PUB network
>> all network traffic suddenly stops, even when I'm pinging some nonexistent
>> host. I have to use virtual console and ping for ex. DNS server, or any
>> internet host to make traffic start again.
>>
>> I'm not sure what I'm doing wrong - I've been using a similar configuration
>> before (with physical machines).
>>
>> Here's my ifconfig output http://aquaz.eu/bridgeifconfig.txt
> The first thing to check is the hypervisor. Do you have your VM configured to allow the NICs to use promiscuous mode? Is there any kind of IP/MAC matching or filtering going on?
>
> Next thing to check is firewall in the VM. Is IPFW or PF enabled? What is the output of "sysctl net.link.bridge" ?
>
> The ping problems are definitely weird, not sure what to think about that.
try the netgraph bridge for a comparison
there is a sample implementation in /usr/share/examples/netgraph I
think under virtual.lan
>
> JN
> _______________________________________________
> freebsd-net@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-net
> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
>
From owner-freebsd-net@freebsd.org Mon May 30 06:49:27 2016
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From: bugzilla-noreply@freebsd.org
To: freebsd-net@FreeBSD.org
Subject: [Bug 209758] Broadcom 5717 C not working
Date: Mon, 30 May 2016 06:49:27 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209758
--- Comment #14 from commit-hook@freebsd.org ---
A commit references this bug:
Author: sephe
Date: Mon May 30 06:49:02 UTC 2016
New revision: 300985
URL: https://svnweb.freebsd.org/changeset/base/300985
Log:
bge: Support 5717 C0, which is almost same as 5720 A0
PR: 209758
Obtained from: DragonFlyBSD d79f5d8f5fe94cd6769207b2901422977d502b=
c0
MFC after: 1 week
Changes:
head/sys/dev/bge/if_bge.c
head/sys/dev/bge/if_bgereg.h
--=20
You are receiving this mail because:
You are the assignee for the bug.=
From owner-freebsd-net@freebsd.org Mon May 30 07:21:25 2016
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Date: Mon, 30 May 2016 09:21:19 +0200
From: Patrick Lamaiziere <patfbsd@davenulle.org>
To: freebsd-net@freebsd.org
Subject: net.inet.ip.fastforwarding and ipsec ?
Message-ID: <20160530092119.50b799bf@mr185083>
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Hello,
Documentation states that setting net.inet.ip.fastforwarding on a
router breaks ipsec. But it's not clear to me "where" ipsec is broken.
Is it ipsec broken to (or from) the router, but ipsec between differents
hosts will work as expected.
Or is it broken for all the ipsec traffic passing through the
router ?
Thanks regards,
From owner-freebsd-net@freebsd.org Mon May 30 07:38:24 2016
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Subject: Re: net.inet.ip.fastforwarding and ipsec ?
To: Patrick Lamaiziere <patfbsd@davenulle.org>, freebsd-net@freebsd.org
References: <20160530092119.50b799bf@mr185083>
From: Eugene Grosbein <eugen@grosbein.net>
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30.05.2016 14:21, Patrick Lamaiziere пишет:
> Hello,
>
> Documentation states that setting net.inet.ip.fastforwarding on a
> router breaks ipsec. But it's not clear to me "where" ipsec is broken.
>
> Is it ipsec broken to (or from) the router, but ipsec between differents
> hosts will work as expected.
>
> Or is it broken for all the ipsec traffic passing through the
> router ?
>
> Thanks regards,
Fastforwarded traffic is passed without any IPSEC processing,
so it gets no encryption/decryption.
Afaik, sysctl net.inet.ip.fastforwarding was removed from recent FreeBSD code
recently and traffic that can be fastforwarded is fastforwarded automagically
and traffic that cannot (f.e. IPSEC traffic) goes through full processing.
So, the problem you mention should be eliminated.
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Date: Mon, 30 May 2016 17:51:09 +1000 (EST)
From: Bruce Evans <brde@optusnet.com.au>
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Subject: Re: ifconfig creates a bogus(?) route
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On Sun, 29 May 2016, Kevin Oberman wrote:
> On Sun, May 29, 2016 at 12:12 AM, Bruce Evans <brde@optusnet.com.au> wrote:
>
>> On Sun, 29 May 2016, Bruce Evans wrote:
>>
>> ...
>>> I still haven't figured out how to set up the bogus(?) route using route
>>> add/change, but can now complete the initialization using a "route change"
>>> that appears to be null:
>>>
>>> Test script:
>>> ...
>>> X # Fix up the initialization with a null change:
>>> X route change -iface 192.168.2.8 192.168.2.8
>>> X netstat -rn
>>>
>>
>> Before:
>>
>>> ...
>>> Y Destination Gateway Flags Refs Use Netif
>>> Expire
>>> Y 127.0.0.1 link#2 UH 0 0 lo0
>>> Y 192.168.2.0/24 link#1 U 0 0 em0
>>> Y 192.168.2.8 link#1 UHS 0 0 lo0
>>> Y route to: 192.168.2.8
>>> Y destination: 192.168.2.8
>>> Y interface: lo0
>>> Y flags: <UP,HOST,DONE,STATIC>
>>> ...
>>>
>>
>> After:
>>
>>> ...
>>> Y Destination Gateway Flags Refs Use Netif
>>> Expire
>>> Y 127.0.0.1 link#2 UH 0 0 lo0
>>> Y 192.168.2.0/24 link#1 U 0 0 em0
>>> Y 192.168.2.8 192.168.2.8 UHS 0 0 lo0
>>> Y route to: 192.168.2.8
>>> Y destination: 192.168.2.8
>>> Y interface: lo0
>>> Y flags: <UP,HOST,DONE,STATIC>
>>> ...
>>> Note that the "null" route change just echos the current setting and it
>>> doesn't change anything according to netstat -rn and route -n, but it
>>> fixes up some internal state so that the ping works. When ping works,
>>> tcpdump shows it going from 127.0.0.1 to 192.168.2.8 and coming back as
>>> expected. When ping hangs, tcpdump shows it going from 0.0.0.0 to
>>> 192.168.2.8 and never coming back. The default route doesn't exist in
>>> either case.
>>>
>>
>> Bah, it did change (from link#1 to 192.168.2.8 for Gateway in netstat -rn
>> output only). -iface makes no difference (I thought it prevented this
>> change).
>>
>> The initialization bug has something to do with the magic default route
>> of 0.0.0.0). When lo0 is used uninitialized, it is still initialized
>> to 0 and the 0 gets copied to somewhere not shown properly in the
>> initial route from (or is it to?) 192.168.2.8. netstat -rn translates
>> this 0 together with another address to #link1, but route -n get
>> doesn't show it. I think this configuration is supposed to not occur.
>> I couldn't find a way to get back it using route(8) after fixing it.
>>
>> When lo0 is brought up first, different magic obscures what is
>> happening. E.g., when lo0 is misconfigured with "inet 127.0.0.127",
>> the em0 route is auto-configured with this strange lo0 address instead
>> of completely misconfigured to 0. Neither netstat -rn nor route -n
>> get displays this clearly (they give the same display as in the
>> uninitialized case except for the .127 route). Then if lo0 is
>> ifconfig'ed again to fix this misconfiguration, the all routes related
>> to the old lo0 (bogus or working) are deleted and not restored. But
>> if lo0 is brought up for the first time after em0, the the 0.0.0.0
>> route related to the old lo0 is not deleted; it keeps breaking things.
>
> When it is in the "broken" condition, what is the output of "route -n get
> 0"?
It is an error: "route: writing to routing socket: No such process".
This is as i should be since I try to delete all active routes in the
test so as to get close enough to the boot-time condition.
> So you have a default route? None appears in any of your messages. Normally
> 0 should route to default. In fact 0/0 is a definition of default. (Well, I
> suppose anything/0 is default, but 0/0 is the normal representation.) Since
> most systems have a default gateway defined, this may relate to the issue
> you are seeing. I'm very unclear what happens with 0/0 if default is not
> defined.
Normally I don't have a default route, except on 1 gateway system where
it goes to the cable modem. This is normally configured by dhcp. On
other systems on the LAN, I use only static routing and rarely have a
default route. Sometimes I add and delete the default route on the other
systems to the gateway system. It is certainly not there after deleting it.
> FWIW, here is what I see on this system (10.3-STABLE r299096):
> Routing tables
>
> Internet:
> Destination Gateway Flags Netif Expire
> default 192.168.1.1 UGS re0
> 127.0.0.1 link#2 UH lo0
> 192.168.1.0/24 link#1 U re0
> 192.168.1.16 link#1 UHS lo0
My userland is mostly 5.2-CURRENT, and its rc never generates a default
route like that. The cable modem gives a non-local default. My gateway
default is 2.2 instead of 1.1 since when I invented static routes for
my local machines I knew even less about routing than I do now and chose
numbers starting at 002.002 instead of 1.1.
(BTW, no one replied to my bug report on this list about breakage of
parsing of numbers like 002 somewhere in libc/net*. I used the leading
zeros to line up dotted quad numbers in tables.)
I now understand the link#1 display a bit better:
- in old versions of netstat -rn, it is what is displayed when the only
available info in a sockaddr_dl, is the link number. This happens for
the /24 link. route get shows nothing in this case (I hacked it to
print the gateway when the gateway flag is not set, but it prints
nothing starting with the same info). Otherwise, the ethernet address
is printed for type IFT_ETHER. This happens for the local machine's
address and for external machines on the LAN. Otherwise, a network
address is printed. This happens for the localhost and default
routes.
- this is dumbed down in current versions of netstat -rn :-(. The
strings are now generated mostly in the kernel, and this seems to
require more complicated code in userland even without fixups to
recover lost details or print more details for debugging. The
kernel also generates link#N when there is little info, and seems
to only generate the network address instead of the ethernet address
for the local machine. Data for external machines on the LAN is no
longer printed in any form.
I finally got some useful info out of debugging printfs in route:
- in the non-working version, the gateway address has sa_family = 18
(IF_LINK), sdl_family = 18 (IF_LINK), sdl_index = 1 (link#1),
sdl_type = 6 (IFT_ETHER), and otherwise 0's. Non-old netstat -rn
prints this as "link#1" and my debugging code prints this and some
raw fields.
- in the working version produced by bringing up lo0 before em0,
the gateway address is unchanged in both non-old netstat -rn and
debugging route -n get.
- in the working version produced by the "null" route change, the
gateway does change -- to sa_family = 2 (AF_INET) and s_addr =
0x0802a8c0 (otherwise 0's). Non-old netstat -rn and debugging
route -n get display this consistently as 192.168.2.8.
- the working version produced by old kernels is different again.
It gives IF_LINK as in the non-working version, but now the
link is for the em0 and the address is for em0 . Netif is still
lo0. Old netstat -rn and debugging route -n get agree on this
since the non-raw part of the debugging code was copied from old
netstat. (The address is decided by the kernel and decoded by
netstat depending on sdl_length -- the length is 12 for ethernet
addresses and 4 for ip4 addresses.)
I got no further trying to set the gateway address precisely so as
to give an actual null change or to change to and from all of the
working and non-working versions.
While here, I will asks about firewalling of routing. I use a clone
of rc.firewall created more than 10 years ago. rc.firewall hasn't
changed much, and is still too simple to do what I want, but also too
complicated to understand or change easily. It has fairly hard-coded
support for not much more than 2 nontrivial configurations: workstation,
for which the external link may be shared but every workstation must
run a firewall; and simple (actually complicated), for which one machine
is a gateway to the external link. I need the latter, , but it needs
different NICs which I don't always have available. Plugging the
external link into the shared switch fails first here:
> # Stop spoofing
> ${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif}
> ${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif}
since with only 1 NIC, the internal NIC iif cannot be different from the
external NIC oif. inet and onet are of course different, but using inet
to reach onet is exactly the spoofing that these rules disallow as far
as I understand.
So these rules apparently need to be relaxed a lot. A network expert
should be able to do this without reducing security much, but no one
did it for /etc/rc.firewall. This particular spoofing problem doesn't
seem to be mentioned in the man page or old versions of the handbook.
I had reduced security here for almost 10 years by forgetting to update
across several changes of NICs and machines. It is not used for anything
except this rule.
Bruce
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Date: Mon, 30 May 2016 11:07:46 +0200
Message-ID: <CAOc73CDN3-qq9OPq-hT1Pn5tD-D6UrGAbDaScQ+XsKzW_grzbw@mail.gmail.com>
Subject: Is there a way to keep an account of which processes generate how
much network traffic?
From: Ben Woods <woodsb02@gmail.com>
To: Yuri <yuri@rawbw.com>
Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
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On Monday, 30 May 2016, Yuri <yuri@rawbw.com
<javascript:_e(%7B%7D,'cvml','yuri@rawbw.com');>> wrote:
> There is vnstat that does this by interface.
>
> But is there a way to do this by the application? This is because nearly
> every packet that is sent through the system is sent on behalf of some
> process running on the system.
>
> It would be nice to be able to see which applications (in general sense)
> generate most traffic.
>
> I am fully aware that the link between pid and an "application" is vague
> because some processes are run through some cryptic command lines. I am
> just interested if anything exists in this area at all.
>
>
> Yuri
>
Hi Yuri,
There is an application called nethogs which does this on Linux, but the
website says it makes heavy use of Linuxisms so won't work on BSD. I had a
quick look at the code and couldn't immediately recognise the Linuxisms in
question, but haven't done a thorough look.
On FreeBSD, I tend to filter traffic by src and destination ip/port to
determine how much traffic an application is using.
Easiest solution I can think of: Use net-mgmt/darkstat.
https://unix4lyfe.org/darkstat/
Slightly more complicated solution, but with potentially more power for
filtering the data: Netflow/NfDump/NfSen
https://forums.freebsd.org/threads/49724/
Good luck!
Regards,
Ben
--
--
From: Benjamin Woods
woodsb02@gmail.com
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Subject: Re: Is there a way to keep an account of which processes generate how
much network traffic?
To: Ben Woods <woodsb02@gmail.com>, Yuri <yuri@rawbw.com>
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On 30/05/2016 5:07 PM, Ben Woods wrote:
> On Monday, 30 May 2016, Yuri <yuri@rawbw.com
> <javascript:_e(%7B%7D,'cvml','yuri@rawbw.com');>> wrote:
>
>> There is vnstat that does this by interface.
>>
>> But is there a way to do this by the application? This is because nearly
>> every packet that is sent through the system is sent on behalf of some
>> process running on the system.
>>
>> It would be nice to be able to see which applications (in general sense)
>> generate most traffic.
>>
>> I am fully aware that the link between pid and an "application" is vague
>> because some processes are run through some cryptic command lines. I am
>> just interested if anything exists in this area at all.
>>
>>
>> Yuri
>>
> Hi Yuri,
>
> There is an application called nethogs which does this on Linux, but the
> website says it makes heavy use of Linuxisms so won't work on BSD. I had a
> quick look at the code and couldn't immediately recognise the Linuxisms in
> question, but haven't done a thorough look.
>
> On FreeBSD, I tend to filter traffic by src and destination ip/port to
> determine how much traffic an application is using.
>
> Easiest solution I can think of: Use net-mgmt/darkstat.
> https://unix4lyfe.org/darkstat/
>
> Slightly more complicated solution, but with potentially more power for
> filtering the data: Netflow/NfDump/NfSen
> https://forums.freebsd.org/threads/49724/
at $JOB we had to do this for outgoing sessions of one particular app.
The answer was to make that app run as a special group and use teh
'gid' match for the outgoing SYN packets from that process to run a
keep-state rule to make all packets from that session go through a
particular counting rule..
it was something like:
ipfw add 10 skipto 15 tcp from any to any not layer 2 setup gid
${SPECIAL_GID} out xmit ${EXTERNAL} keep-state
ipfw add 11 skipto 20 ip from any to any
ipfw add 15 count ip from any to any in
ipfw add 16 count ip from any to any out
ipfw add 20 <whatever comes next>
since keep-state as an implicit check-state before evaluation, all
session packets from sessions initiate by that process.
the not-layer2 was needed in our case to stop a kernel panic, we had
bridging ipfw as well and it caused problems.
I have considered adding a feature where sockets opened by a partuclar
process would generate packets with a particular tag
which could be detected in the firewall
it would be a bit like using the 'setfib' command.. the property would
be inherrited.
so setsockflag -4 ssh foo.com would make all ssh's packet be marked
with a tag of 4.
there is already a rule in ipfw to detect these tags.
I did consider using setfib and setting up a separate fib for that app
to use. Fib associations can also be detected in the firewall.
>
> Good luck!
>
> Regards,
> Ben
>
>
From owner-freebsd-net@freebsd.org Tue May 31 12:56:35 2016
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From: "Julian K." <jk@kornberger.name>
Subject: IPFW: table support for MAC addresses?
Message-ID: <574D89F6.3030806@kornberger.name>
Date: Tue, 31 May 2016 14:56:22 +0200
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Hi,
I studied the IPFW improvements in FreeBSD 11. Unfortunately I can't
find a way to put MAC addresses in IPFW tables.
Are there any plans to build support for it in the upcoming release?
Regards,
Julian
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Date: Tue, 31 May 2016 11:55:25 -0600
To: net@freebsd.org
From: Brett Glass <brett@lariat.net>
Subject: MPPC for Netgraph: Isn't it time?
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Everyone:
Just built a kernel today, and realized that for years I have had
to integrate MPPC compression/encryption (see man page ng_mppc(4))
for PPP/L2TP/PPTP manually, even though the HiFn patent has long
since expired and there's no reason not to include the files in the
FreeBSD code base. Could a committer with access to that part of
the tree please import the files mppc.h, mppcc.c, and mppcd.c into
/sys/net so there's no need to find and fetch them every time?
--Brett Glass
From owner-freebsd-net@freebsd.org Wed Jun 1 05:40:24 2016
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Subject: Re: MPPC for Netgraph: Isn't it time?
From: Rui Paulo <rpaulo@me.com>
To: Brett Glass <brett@lariat.net>, net@freebsd.org
Date: Tue, 31 May 2016 22:40:16 -0700
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On Tue, 2016-05-31 at 11:55 -0600, Brett Glass wrote:
> Everyone:
>
> Just built a kernel today, and realized that for years I have hadÂ
> to integrate MPPC compression/encryption (see man page ng_mppc(4))Â
> for PPP/L2TP/PPTP manually, even though the HiFn patent has longÂ
> since expired and there's no reason not to include the files in theÂ
> FreeBSD code base. Could a committer with access to that part ofÂ
> the tree please import the files mppc.h, mppcc.c, and mppcd.c intoÂ
> /sys/net so there's no need to find and fetch them every time?
No committer with a sane mind will import code knowing there's a patent
even if it's expired because TANAL (They Are Not Lawyers).
It's best to contact the FreeBSD Foundation to analyse the status of
the patent first.
--
Rui Paulo
From owner-freebsd-net@freebsd.org Wed Jun 1 08:22:48 2016
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Subject: Re: MPPC for Netgraph: Isn't it time?
To: Brett Glass <brett@lariat.net>, net@freebsd.org
References: <201605311758.LAA27388@mail.lariat.net>
From: Eugene Grosbein <eugen@grosbein.net>
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On 01.06.2016 00:55, Brett Glass wrote:
> Everyone:
>
> Just built a kernel today, and realized that for years I have had
> to integrate MPPC compression/encryption (see man page ng_mppc(4))
> for PPP/L2TP/PPTP manually, even though the HiFn patent has long
> since expired and there's no reason not to include the files in the
> FreeBSD code base. Could a committer with access to that part of
> the tree please import the files mppc.h, mppcc.c, and mppcd.c into
> /sys/net so there's no need to find and fetch them every time?
This manual page information is stale.
FreeBSD has stock MPPC support for long time and I use it extensively since
FreeBSD 8 with mpd5 and netgraph.
From owner-freebsd-net@freebsd.org Wed Jun 1 13:43:46 2016
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From: bugzilla-noreply@freebsd.org
To: freebsd-net@FreeBSD.org
Subject: [Bug 209351] VLAN TX errors, possible performance regression after
10.1-STABLE (r281235)
Date: Wed, 01 Jun 2016 13:43:46 +0000
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X-Bugzilla-Keywords: regression
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209351
gondim@bsdinfo.com.br changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gondim@bsdinfo.com.br
--- Comment #1 from gondim@bsdinfo.com.br ---
Hi,
I am the owner of the server. Thanks for your help in solving this problem.=
I
believe that with the solution of this problem our FreeBSD will get stronge=
r,
providing more performance in demanding traffic.
Everything leads to believe that is related to a problem with vlan, but as =
I am
no developer can not say for sure if the problem is really that.
What I realized is that the connections without vlan, this problem does not
happen.
--=20
You are receiving this mail because:
You are the assignee for the bug.=
From owner-freebsd-net@freebsd.org Wed Jun 1 15:08:31 2016
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Subject: [Bug 166255] [net] [patch] It should be possible to disable
"promiscuous mode enabled" messages
Date: Wed, 01 Jun 2016 15:08:31 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D166255
--- Comment #29 from commit-hook@freebsd.org ---
A commit references this bug:
Author: n_hibma
Date: Wed Jun 1 15:08:27 UTC 2016
New revision: 301129
URL: https://svnweb.freebsd.org/changeset/base/301129
Log:
MFC 300670 (slightly adapted for 10-STABLE):
Change net.link.log_promisc_mode_change to a read-only tunable.
PR: 166255
Submitted by: eugen.grosbein.net
Obtained from: hselasky
Changes:
_U stable/10/
stable/10/sys/net/if.c
--=20
You are receiving this mail because:
You are the assignee for the bug.=
From owner-freebsd-net@freebsd.org Wed Jun 1 15:58:46 2016
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Subject: Re: MPPC for Netgraph: Isn't it time?
To: Brett Glass <brett@lariat.net>,
"freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
References: <201605311758.LAA27388@mail.lariat.net>
<574E9B48.1050200@grosbein.net> <201606011509.JAA08506@mail.lariat.net>
From: Eugene Grosbein <eugen@grosbein.net>
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Date: Wed, 1 Jun 2016 22:58:24 +0700
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01.06.2016 22:08, Brett Glass пишет:
> At 02:22 AM 6/1/2016, you wrote:
>
>> This manual page information is stale.
>> FreeBSD has stock MPPC support for long time and I use it extensively since
>> FreeBSD 8 with mpd5 and netgraph.
>
> If this is true, I have not seen it in any release version of FreeBSD. I have been adding the patch and the ng_mppc node does not become available unless I do.
Well, that was some misunderstanding at my side.
Despite of the fact that ng_mppc.ko is present in FreeBSD for long time,
it still supports MPPE only and no compression without exta code you mentioned.
My bad.
From owner-freebsd-net@freebsd.org Wed Jun 1 17:06:39 2016
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Date: Wed, 01 Jun 2016 10:39:46 -0600
To: Rui Paulo <rpaulo@me.com>, net@freebsd.org
From: Brett Glass <brett@lariat.net>
Subject: Re: MPPC for Netgraph: Isn't it time?
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At 11:40 PM 5/31/2016, Rui Paulo wrote:
>On Tue, 2016-05-31 at 11:55 -0600, Brett Glass wrote:
> > Everyone:
> >
> > Just built a kernel today, and realized that for years I have hadÂ
> > to integrate MPPC compression/encryption (see man page ng_mppc(4))Â
> > for PPP/L2TP/PPTP manually, even though the HiFn patent has longÂ
> > since expired and there's no reason not to include the files in theÂ
> > FreeBSD code base. Could a committer with access to that part ofÂ
> > the tree please import the files mppc.h, mppcc.c, and mppcd.c intoÂ
> > /sys/net so there's no need to find and fetch them every time?
>
>No committer with a sane mind will import code knowing there's a patent
>even if it's expired because TANAL (They Are Not Lawyers).
>
>It's best to contact the FreeBSD Foundation to analyse the status of
>the patent first.
The status of the patent is well known. All Linux distributions now
ship with a version of PoPToP (an inferior PPTP implementation) that
includes MPPC.
--Brett Glass
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for <freebsd-net@freebsd.org>; Thu, 2 Jun 2016 14:19:01 +0200 (CEST)
Subject: Re: IPFW: table support for MAC addresses?
To: freebsd-net@freebsd.org
References: <574D89F6.3030806@kornberger.name>
From: "Julian K." <jk@kornberger.name>
Message-ID: <57502430.1030309@kornberger.name>
Date: Thu, 2 Jun 2016 14:18:56 +0200
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Hi,
is there anyone who wants to use MAC based rules with IPFW?
I want to build a captive portal that also supports IPv6. MAC addresses
in IPFW tables would help a lot.
Regards,
Julian
On 31.05.2016 14:56, Julian K. wrote:
> Hi,
>
> I studied the IPFW improvements in FreeBSD 11. Unfortunately I can't
> find a way to put MAC addresses in IPFW tables.
> Are there any plans to build support for it in the upcoming release?
>
> Regards,
> Julian
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Date: Thu, 2 Jun 2016 05:43:37 +0000
From: Glen Barber <gjb@FreeBSD.org>
To: Matthias Andree <mandree@FreeBSD.org>
Cc: re <re@FreeBSD.org>, melifaro@freebsd.org,
daniel.engberg.lists@pyret.net, freebsd-net@freebsd.org
Subject: Re: regression/showstopper for FreeBSD 11? Fwd: Regarding OpenVPN on
FreeBSD
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Thank you for the heads-up.
Glen
On Thu, Jun 02, 2016 at 07:34:33AM +0200, Matthias Andree wrote:
> Dear release engineers,
>=20
> there may be a showstopper for OpenVPN on FreeBSD 11 due to routing
> changes, and some analysis has already happened.
>=20
> Comment #1 in the bug suggests it may be a new kernel bug.
> <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D207831>
>=20
> Please investigate and fix.
>=20
> Thank you.
>=20
> Cheers,
> Matthias
> Date: Thu, 2 Jun 2016 00:08:24 +0200
> From: Daniel Engberg <daniel.engberg.lists@pyret.net>
> To: mandree@FreeBSD.org
> Subject: Regarding OpenVPN on FreeBSD
>=20
> Hi,
>=20
> Since FreeBSD 11 is approaching you probably want to have a look and/or e=
scalate to someone who can make decisions about it.
>=20
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D207831
>=20
> Best regards,
> Daniel
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Subject: [Differential] D6689: tcp/lro: Implement hash table for LRO entries.
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From owner-freebsd-net@freebsd.org Thu Jun 2 05:34:36 2016
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References: <574F5CD8.7020302@pyret.net>
Subject: regression/showstopper for FreeBSD 11? Fwd: Regarding OpenVPN on
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To: re <re@FreeBSD.org>, melifaro@freebsd.org
Cc: daniel.engberg.lists@pyret.net, freebsd-net@freebsd.org
From: Matthias Andree <mandree@FreeBSD.org>
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Dear release engineers,
there may be a showstopper for OpenVPN on FreeBSD 11 due to routing
changes, and some analysis has already happened.
Comment #1 in the bug suggests it may be a new kernel bug.
<https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207831>
Please investigate and fix.
Thank you.
Cheers,
Matthias
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To: mandree@FreeBSD.org
From: Daniel Engberg <daniel.engberg.lists@pyret.net>
Subject: Regarding OpenVPN on FreeBSD
Message-ID: <574F5CD8.7020302@pyret.net>
Date: Thu, 2 Jun 2016 00:08:24 +0200
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Hi,
Since FreeBSD 11 is approaching you probably want to have a look and/or escalate to someone who can make decisions about it.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207831
Best regards,
Daniel
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I keep receiving blank emails like this one.
Is everyone else?
Is there something wrong with the bug tracking system?
-----Original Message-----
From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] =
On Behalf Of sepherosa_gmail.com (Sepherosa Ziehau)
Sent: Thursday, June 02, 2016 11:23 AM
To: freebsd-net@freebsd.org
Subject: [Differential] D6689: tcp/lro: Implement hash table for LRO entrie=
s.
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Date: Thu, 2 Jun 2016 13:20:15 -0700
From: hiren panchasara <hiren@strugglingcoder.info>
To: Sreekanth Rupavatharam <rupavath@juniper.net>
Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>,
"jfvogel@gmail.com" <jfvogel@gmail.com>
Subject: Re: Possible transmit/stats problem in igb driver.
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On 06/01/16 at 08:25P, Sreekanth Rupavatharam wrote:
> I am seeing a strange issue with transmit with igb driver and wanted to c=
heck with you if this issue is already noted. I didn?t find anything partic=
ularly matching in Bugzilla. There is a test I am running where a iXIa is s=
ending arps at about 500/sec for 10 seconds. This test works fine if the in=
coming packet size is 64 bytes, but if the packets are larger than 64 bytes=
, then I see that the counter in dev.igb.1.queue0.tx_packets shows the corr=
ect value(about 5000), but dev.igb.1.mac_stats.total_pkts_txd doesn?t refle=
ct that.
>=20
>=20
> Before
> dev.igb.1.queue0.tx_packets: 24907933
> dev.igb.1.mac_stats.total_pkts_txd: 16647169
>=20
> After
> dev.igb.1.queue0.tx_packets: 24913324
> dev.igb.1.mac_stats.total_pkts_txd: 16647545 =
|
>=20
>=20
> queue0.tx_packets difference =3D 24913324 ? 24907933 =3D 5391
> mac_stats.total_pkts_txd difference =3D 16647545 ? 16647169 =3D 376
>=20
> I do not see any errors in the stats(I can post the complete stats if you=
wish) nor do I see pause frames being received. Is there an explanation as=
to why the packets are dispatched to the hardware but are not transmitted =
on to the wire?
Apart from stats, do you see anything else going wrong? i.e. do you
actually see less packets (arp replies??) than expected?
Taking your example, tx_packets is something we count in the drivers and
total_pkts_txd is calculated in the card and we just read it off of it
to report (E1000_TPT).
To understand your setup better, ixia is the sender and your box with
igb(4) is the receiver and your are sending arp requests to it.
Can you post following for working (size <=3D 64bytes) and non-working
(size > 64bytes) cases for before/after?
sysctl dev.igb | grep tx_packets
sysctl dev.igb | grep total_pkts_txd
sysctl dev.igb | grep rx_packets
sysctl dev.igb | grep total_pkts_recvd
netstat -sp arp
(You can netstat -z to clear the counters between runs.)
Cheers,
Hiren
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Subject: Re: Blank Emails (example: D6689: tcp/lro: Implement hash table for
LRO entries.)
To: freebsd-net@freebsd.org
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I am. I am also new here so I thought they are expected.
Grzegorz
On 02/06/2016 16:45, David DeSimone wrote:
> I keep receiving blank emails like this one.
>
> Is everyone else?
>
> Is there something wrong with the bug tracking system?
>
>
> -----Original Message-----
> From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@freebsd.org] On Behalf Of sepherosa_gmail.com (Sepherosa Ziehau)
> Sent: Thursday, June 02, 2016 11:23 AM
> To: freebsd-net@freebsd.org
> Subject: [Differential] D6689: tcp/lro: Implement hash table for LRO entries.
>
>
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From owner-freebsd-net@freebsd.org Thu Jun 2 20:29:23 2016
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Date: Thu, 2 Jun 2016 13:29:22 -0700
From: hiren panchasara <hiren@strugglingcoder.info>
To: Grzegorz Junka <list1@gjunka.com>
Cc: freebsd-net@freebsd.org
Subject: Re: Blank Emails (example: D6689: tcp/lro: Implement hash table for
LRO entries.)
Message-ID: <20160602202922.GH8994@strugglingcoder.info>
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On 06/02/16 at 08:25P, Grzegorz Junka wrote:
> I am. I am also new here so I thought they are expected.
>=20
> Grzegorz
>=20
>=20
> On 02/06/2016 16:45, David DeSimone wrote:
> > I keep receiving blank emails like this one.
> >
> > Is everyone else?
> >
> > Is there something wrong with the bug tracking system?
I believe its the phabricator (review system) that does it. I'll let the
admins know.
Cheers,
Hiren
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CC: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, "jfvogel@gmail.com"
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Subject: Re: Possible transmit/stats problem in igb driver.
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To: Brett Glass <brett@lariat.net>, net@freebsd.org
From: Pedro Giffuni <pfg@FreeBSD.org>
Subject: Re: MPPC for Netgraph: Isn't it time?
Message-ID: <5525f6ff-b1fe-a254-caf9-38fcbebc7dcd@FreeBSD.org>
Date: Thu, 2 Jun 2016 16:13:15 -0500
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Hi Brett;
I looked at it briefly but it's not evident where to get the missing
support or any licensing information at all.
If you can put together a review in phabricator or bugzilla and add me
to it I will be glad to take a look.
Pedro.
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<20160602202015.GG8994@strugglingcoder.info>
<9A903EE5-3F2C-46C0-B563-1150F81E3507@juniper.net>
Date: Thu, 2 Jun 2016 14:40:14 -0700
Message-ID: <CAFOYbc=s0L5SQS8-1ZC5TGxYkuQpPGhpWCAMkBojNwS=jqOSvg@mail.gmail.com>
Subject: Re: Possible transmit/stats problem in igb driver.
From: Jack Vogel <jfvogel@gmail.com>
To: Sreekanth Rupavatharam <rupavath@juniper.net>
Cc: hiren panchasara <hiren@strugglingcoder.info>,
"freebsd-net@freebsd.org" <freebsd-net@freebsd.org>
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Hmmm, so I no longer have access to any of this, but I'm wondering if there
is some
other stat that might report errors or some sort that would match the
missing/bad packets?
Maybe they were considered runts or something and dropped.
Good luck :)
Jack
On Thu, Jun 2, 2016 at 2:11 PM, Sreekanth Rupavatharam <rupavath@juniper.ne=
t
> wrote:
> Inline
>
> >Apart from stats, do you see anything else going wrong? i.e. do you
> >actually see less packets (arp replies??) than expected?
>
> [SR] The packets are not going out on the wire. The tool doesn=E2=80=99t =
receive
> the packets. That=E2=80=99s how I started noticing the issue.
>
> >Taking your example, tx_packets is something we count in the drivers and
> >total_pkts_txd is calculated in the card and we just read it off of it
> >to report (E1000_TPT).
>
> [SR] Correct. My main question would be under what circumstance would the
> packet handed off to hardware will *not* be transmitted?. Especially
> considering there are no transmit errors or pause frames received. There
> are no dma tx failures either. That=E2=80=99s the baffling part. I tried =
another
> exercise where I used ping of various sizes going out, but that doesn=E2=
=80=99t
> seem to trigger the problem.
>
>
> >To understand your setup better, ixia is the sender and your box with
> >igb(4) is the receiver and your are sending arp requests to it.
>
> Yes, correct.
>
> >Can you post following for working (size <=3D 64bytes) and non-working
> >(size > 64bytes) cases for before/after?
> >
> >sysctl dev.igb | grep tx_packets
> >sysctl dev.igb | grep total_pkts_txd
> >sysctl dev.igb | grep rx_packets
> >sysctl dev.igb | grep total_pkts_recvd
>
>
> Before(not working):
> dev.igb.1.queue0.tx_packets: 24907933
> dev.igb.1.queue0.rx_packets: 18086575
> dev.igb.1.mac_stats.total_pkts_recvd: 25057359
> dev.igb.1.mac_stats.total_pkts_txd: 16647169
>
> After(not working):
> dev.igb.1.queue0.tx_packets: 24913324
> dev.igb.1.queue0.rx_packets: 18091832
> dev.igb.1.mac_stats.total_pkts_recvd: 25062618
> dev.igb.1.mac_stats.total_pkts_txd: 16647545
> >netstat -sp arp
>
> The difference is 5391 for queue0.tx_packets but for
> mac_stats.total_pkts_txd is 376
> Everything else is matching up.
>
> Before (working)
> dev.igb.1.queue0.tx_packets: 25359165
> dev.igb.1.queue0.rx_packets: 18526094
> dev.igb.1.mac_stats.total_pkts_recvd: 25508763
> dev.igb.1.mac_stats.total_pkts_txd: 16831587
>
>
> After(working)
> dev.igb.1.queue0.tx_packets: 25364597
> dev.igb.1.queue0.rx_packets: 18531398
> dev.igb.1.mac_stats.total_pkts_recvd: 25514009
> dev.igb.1.mac_stats.total_pkts_txd: 16836833
>
>
> Another interesting stat is
> before_notworking:dev.igb.1.interrupts.tx_queue_empty: 16646890
> after_notworking:dev.igb.1.interrupts.tx_queue_empty: 16647266
>
> The difference here is exactly 376 which is the number of packets that th=
e
> device actually claims to have transmitted. It=E2=80=99s as though it did=
n=E2=80=99t see
> the other packets en-queued in the ring descriptor.
>
>
> I can=E2=80=99t do netstat just for arp as these are coming in a tunnel(P=
ackets
> don=E2=80=99t=E2=80=99 show up as arp on the interface). However, I did s=
ee the packet rate
> was about 500 packets/sec
>
>
> >(You can netstat -z to clear the counters between runs.)
> >
> >Cheers,
> >Hiren
>
>
From owner-freebsd-net@freebsd.org Thu Jun 2 21:41:05 2016
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Date: Thu, 2 Jun 2016 14:41:04 -0700
From: hiren panchasara <hiren@strugglingcoder.info>
To: Sreekanth Rupavatharam <rupavath@juniper.net>
Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>,
"jfvogel@gmail.com" <jfvogel@gmail.com>, sbruno@FreeBSD.org,
erj@FreeBSD.org
Subject: Re: Possible transmit/stats problem in igb driver.
Message-ID: <20160602214104.GJ8994@strugglingcoder.info>
References: <D7944476-98AD-4548-99E3-6E88648E2B06@juniper.net>
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+ Sean, Eric
On 06/02/16 at 09:11P, Sreekanth Rupavatharam wrote:
> Inline
>=20
> >Apart from stats, do you see anything else going wrong? i.e. do you
> >actually see less packets (arp replies??) than expected?
>=20
> [SR] The packets are not going out on the wire. The tool doesn?t receive =
the packets. That?s how I started noticing the issue.=20
>=20
> >Taking your example, tx_packets is something we count in the drivers and
> >total_pkts_txd is calculated in the card and we just read it off of it
> >to report (E1000_TPT).
>=20
> [SR] Correct. My main question would be under what circumstance would the=
packet handed off to hardware will *not* be transmitted?. Especially consi=
dering there are no transmit errors or pause frames received. There are no =
dma tx failures either. That?s the baffling part. I tried another exercise =
where I used ping of various sizes going out, but that doesn?t seem to trig=
ger the problem.
>=20
>=20
> >To understand your setup better, ixia is the sender and your box with
> >igb(4) is the receiver and your are sending arp requests to it.
>=20
> Yes, correct.=20
>=20
> >Can you post following for working (size <=3D 64bytes) and non-working
> >(size > 64bytes) cases for before/after?
> >
> >sysctl dev.igb | grep tx_packets
> >sysctl dev.igb | grep total_pkts_txd
> >sysctl dev.igb | grep rx_packets
> >sysctl dev.igb | grep total_pkts_recvd
>=20
>=20
> Before(not working):=20
> dev.igb.1.queue0.tx_packets: 24907933
> dev.igb.1.queue0.rx_packets: 18086575
> dev.igb.1.mac_stats.total_pkts_recvd: 25057359
> dev.igb.1.mac_stats.total_pkts_txd: 16647169
>=20
> After(not working):
> dev.igb.1.queue0.tx_packets: 24913324
> dev.igb.1.queue0.rx_packets: 18091832
> dev.igb.1.mac_stats.total_pkts_recvd: 25062618
> dev.igb.1.mac_stats.total_pkts_txd: 16647545
> >netstat -sp arp
>=20
> The difference is 5391 for queue0.tx_packets but for mac_stats.total_pkt=
s_txd is 376
> Everything else is matching up.=20
>=20
> Before (working)
> dev.igb.1.queue0.tx_packets: 25359165
> dev.igb.1.queue0.rx_packets: 18526094
> dev.igb.1.mac_stats.total_pkts_recvd: 25508763
> dev.igb.1.mac_stats.total_pkts_txd: 16831587
>=20
>=20
> After(working)
> dev.igb.1.queue0.tx_packets: 25364597
> dev.igb.1.queue0.rx_packets: 18531398
> dev.igb.1.mac_stats.total_pkts_recvd: 25514009
> dev.igb.1.mac_stats.total_pkts_txd: 16836833
>=20
>=20
> Another interesting stat is=20
> before_notworking:dev.igb.1.interrupts.tx_queue_empty: 16646890
> after_notworking:dev.igb.1.interrupts.tx_queue_empty: 16647266
>=20
> The difference here is exactly 376 which is the number of packets that th=
e device actually claims to have transmitted. It?s as though it didn?t see =
the other packets en-queued in the ring descriptor.
>=20
Very interesting. Do you tune defaults at all? What does sysctl hw.igb
say? Not sure if bumping up txd would help.
Adding Sean and Eric to throw some light.
>=20
> I can?t do netstat just for arp as these are coming in a tunnel(Packets d=
on?t? show up as arp on the interface). However, I did see the packet rate =
was about 500 packets/sec
>
Cheers,
Hiren
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From: Sreekanth Rupavatharam <rupavath@juniper.net>
To: Jack Vogel <jfvogel@gmail.com>
CC: hiren panchasara <hiren@strugglingcoder.info>, "freebsd-net@freebsd.org"
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Subject: Re: Possible transmit/stats problem in igb driver.
Thread-Topic: Possible transmit/stats problem in igb driver.
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Date: Thu, 2 Jun 2016 22:09:17 +0000
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From: Aleksandr A Babaylov <"."@babolo.ru>
To: "Julian K." <jk@kornberger.name>
Cc: freebsd-net@freebsd.org
Subject: Re: IPFW: table support for MAC addresses?
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On Thu, Jun 02, 2016 at 02:18:56PM +0200, Julian K. wrote:
> is there anyone who wants to use MAC based rules with IPFW?
> I want to build a captive portal that also supports IPv6. MAC addresses
> in IPFW tables would help a lot.
I use MAC in IPFW and want MAC in IPFW tables to simplify rules.
From owner-freebsd-net@freebsd.org Fri Jun 3 16:44:42 2016
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Subject: [Bug 209351] VLAN TX errors, possible performance regression after
10.1-STABLE (r281235)
Date: Fri, 03 Jun 2016 16:44:42 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209351
Navdeep Parhar <np@FreeBSD.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |np@FreeBSD.org
--- Comment #2 from Navdeep Parhar <np@FreeBSD.org> ---
Can you run this for a few seconds (when the output errors are occurring) a=
nd
provide the output? You may have to "kldload dtraceall" first.
# dtrace -n 'fbt::*_transmit:return {@[probefunc, arg1] =3D count()}'
--=20
You are receiving this mail because:
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From: Jack Vogel <jfvogel@gmail.com>
Date: Fri, 3 Jun 2016 13:22:07 -0700
Message-ID: <CAFOYbcmi_q6DF1uDiyw+1D6r37V3+Ytcb1Sfz+tf7ZJVsWMnzg@mail.gmail.com>
Subject: Re: Possible transmit/stats problem in igb driver.
To: Sreekanth Rupavatharam <rupavath@juniper.net>
Cc: hiren panchasara <hiren@strugglingcoder.info>,
"freebsd-net@freebsd.org" <freebsd-net@freebsd.org>,
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That's an interesting theory, you could add a check into the tx path
looking for a zero m_len and see, seems unlikely though :)
Jack
On Fri, Jun 3, 2016 at 1:15 PM, Sreekanth Rupavatharam <rupavath@juniper.net
> wrote:
> Wondering if this can happen if somehow the mbuf->m_len is not
> correct(e.g., 0) and thus causing the dma to fail silently. The only way
> this is happening if the arp request is larger than 64 bytes and the arp
> response code is reusing the packet to send a 64 byte response.
>
> Thanks,
>
> -Sreekanth
>
>
> On 6/2/16, 2:41 PM, "hiren panchasara" <hiren@strugglingcoder.info> wrote:
>
> >+ Sean, Eric
> >
> >On 06/02/16 at 09:11P, Sreekanth Rupavatharam wrote:
> >> Inline
> >>
> >> >Apart from stats, do you see anything else going wrong? i.e. do you
> >> >actually see less packets (arp replies??) than expected?
> >>
> >> [SR] The packets are not going out on the wire. The tool doesn?t
> receive the packets. That?s how I started noticing the issue.
> >>
> >> >Taking your example, tx_packets is something we count in the drivers
> and
> >> >total_pkts_txd is calculated in the card and we just read it off of it
> >> >to report (E1000_TPT).
> >>
> >> [SR] Correct. My main question would be under what circumstance would
> the packet handed off to hardware will *not* be transmitted?. Especially
> considering there are no transmit errors or pause frames received. There
> are no dma tx failures either. That?s the baffling part. I tried another
> exercise where I used ping of various sizes going out, but that doesn?t
> seem to trigger the problem.
> >>
> >>
> >> >To understand your setup better, ixia is the sender and your box with
> >> >igb(4) is the receiver and your are sending arp requests to it.
> >>
> >> Yes, correct.
> >>
> >> >Can you post following for working (size <= 64bytes) and non-working
> >> >(size > 64bytes) cases for before/after?
> >> >
> >> >sysctl dev.igb | grep tx_packets
> >> >sysctl dev.igb | grep total_pkts_txd
> >> >sysctl dev.igb | grep rx_packets
> >> >sysctl dev.igb | grep total_pkts_recvd
> >>
> >>
> >> Before(not working):
> >> dev.igb.1.queue0.tx_packets: 24907933
> >> dev.igb.1.queue0.rx_packets: 18086575
> >> dev.igb.1.mac_stats.total_pkts_recvd: 25057359
> >> dev.igb.1.mac_stats.total_pkts_txd: 16647169
> >>
> >> After(not working):
> >> dev.igb.1.queue0.tx_packets: 24913324
> >> dev.igb.1.queue0.rx_packets: 18091832
> >> dev.igb.1.mac_stats.total_pkts_recvd: 25062618
> >> dev.igb.1.mac_stats.total_pkts_txd: 16647545
> >> >netstat -sp arp
> >>
> >> The difference is 5391 for queue0.tx_packets but for
> mac_stats.total_pkts_txd is 376
> >> Everything else is matching up.
> >>
> >> Before (working)
> >> dev.igb.1.queue0.tx_packets: 25359165
> >> dev.igb.1.queue0.rx_packets: 18526094
> >> dev.igb.1.mac_stats.total_pkts_recvd: 25508763
> >> dev.igb.1.mac_stats.total_pkts_txd: 16831587
> >>
> >>
> >> After(working)
> >> dev.igb.1.queue0.tx_packets: 25364597
> >> dev.igb.1.queue0.rx_packets: 18531398
> >> dev.igb.1.mac_stats.total_pkts_recvd: 25514009
> >> dev.igb.1.mac_stats.total_pkts_txd: 16836833
> >>
> >>
> >> Another interesting stat is
> >> before_notworking:dev.igb.1.interrupts.tx_queue_empty: 16646890
> >> after_notworking:dev.igb.1.interrupts.tx_queue_empty: 16647266
> >>
> >> The difference here is exactly 376 which is the number of packets that
> the device actually claims to have transmitted. It?s as though it didn?t
> see the other packets en-queued in the ring descriptor.
> >>
> >
> >Very interesting. Do you tune defaults at all? What does sysctl hw.igb
> >say? Not sure if bumping up txd would help.
> >
> >Adding Sean and Eric to throw some light.
> >
> >>
> >> I can?t do netstat just for arp as these are coming in a tunnel(Packets
> don?t? show up as arp on the interface). However, I did see the packet rate
> was about 500 packets/sec
> >>
> >
> >Cheers,
> >Hiren
>
>
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From: Sreekanth Rupavatharam <rupavath@juniper.net>
To: hiren panchasara <hiren@strugglingcoder.info>
CC: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, "jfvogel@gmail.com"
<jfvogel@gmail.com>, "sbruno@FreeBSD.org" <sbruno@FreeBSD.org>,
"erj@FreeBSD.org" <erj@FreeBSD.org>
Subject: Re: Possible transmit/stats problem in igb driver.
Thread-Topic: Possible transmit/stats problem in igb driver.
Thread-Index: AQHRvEO2jFZU+cZVnkCsgDAxQb6jLZ/Wn9GA//+Y+oCAAH2aAIABBQoA
Date: Fri, 3 Jun 2016 20:15:23 +0000
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