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Date:      Thu, 13 Feb 2003 15:17:23 -0500
From:      Bill Moran <wmoran@potentialtech.com>
To:        Brian Henning <b1henning@hotmail.com>
Cc:        freebsd <freebsd-questions@FreeBSD.ORG>
Subject:   Re: network issue revisited
Message-ID:  <3E4BFD53.6090605@potentialtech.com>
References:  <OE59DQlYJhbQ4muaq5B0000b793@hotmail.com> <3E4BF6AF.4030801@potentialtech.com> <OE44gnjXXBARdkfwuci0001022b@hotmail.com>

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Brian Henning wrote:
> This is my router info.
> 
> rawhide> ip addr show
> 1: lo: <LOOPBACK,UP> mtu 3924 qdisc noqueue
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>     inet 127.0.0.1/8 brd 127.255.255.255 scope global lo
> 2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 100
>     link/ether 00:50:ba:b8:8c:2e brd ff:ff:ff:ff:ff:ff
>     inet 66.41.139.87/21 brd 255.255.255.255 scope global eth0
> 3: eth1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 100
>     link/ether 00:50:ba:ae:be:fa brd ff:ff:ff:ff:ff:ff
>     inet 192.168.1.254/24 brd 192.168.1.255 scope global eth1

Linux box, eh?

> rawhide> ip route show
> 192.168.1.0/24 dev eth1  proto kernel  scope link  src 192.168.1.254
> 66.41.136.0/21 dev eth0  proto kernel  scope link  src 66.41.139.87
> default via 66.41.136.1 dev eth0

Brian, I don't see anything here that looks wrong at all.  I assume
you have some sort of NAT software handling traffic between the two
interfaces, but I wouldn't normally expect that to cause problems if
the external interface is down.

I honestly can't imaging what could be causing the problems you
describe.  Hopefully, someone else will be able to look at this
and come up with something, but I'm stumped.

If you turn rawhide off (shut it down) can BSD1 ping BSD2?

Is the switch "managed"?  If so, make sure it's not blocking any
sort of broadcast traffic or the like.  Some of those (especially
older) managed switches can cause the strangest problems if they're
configured wrong.

> ----- Original Message -----
> From: "Bill Moran" <wmoran@potentialtech.com>
> To: "Brian Henning" <b1henning@hotmail.com>
> Cc: "freebsd" <freebsd-questions@FreeBSD.ORG>
> Sent: Thursday, February 13, 2003 1:49 PM
> Subject: Re: network issue revisited
> 
> 
> 
>>Brian Henning wrote:
>>
>>>Let me try again, here is my situation and question with a little more
>>
> detail.
> 
>>>My local network (192.168.1.0) consists of two machine BSD1 (192.168.1.40)
>>
> and
> 
>>>BSD2 (192.168.1.42). Both of these machines use the subnet mask
>>
> 255.255.255.0
> 
>>>and gateway 192.168.1.254.
>>>
>>>There is a third machine GATEWAY (192.168.1.254, ip address from isp) has
>>
> two
> 
>>>nics and acts as the router.
>>>
>>>All of these machine are connected to a switch locally.
>>>
>>>When my internet connection goes down for whatever reason I
>>>loose connections in my local network. For example, i can't ping
>>
> 192.168.1.40
> 
>>>from 192.168.1.42. is there any explaination for this?
>>
>>Not that I can think of.  There's no reason I can imagine that your local
>>connectivity should suffer from Internet problems.  Especially if you're
>>connecting via IP address (which rules out DNS problems).
>>
>>Could you provide 'netstat -rn' and 'ifconfig' output from GATEWAY, please.
>>I don't see anything in the other information you provided that would
>>indicate any sort of misconfig on BSD2.

-- 
Bill Moran
Potential Technologies
http://www.potentialtech.com


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