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Date:      Mon, 24 Sep 2012 20:06:22 -0700
From:      "Rudy (bulk)" <crapsh@monkeybrains.net>
To:        Ryan Stone <rysto32@gmail.com>
Cc:        freebsd-net <freebsd-net@freebsd.org>
Subject:   Re: ping: sendto: No buffer space available
Message-ID:  <50611FAE.7060809@monkeybrains.net>
In-Reply-To: <CAFMmRNzUbiSKhLxiFx-fLrw7LWJ-7h921oaOk-V2ekbSb0TpFg@mail.gmail.com>
References:  <5060884C.3050709@monkeybrains.net> <CAFMmRNzUbiSKhLxiFx-fLrw7LWJ-7h921oaOk-V2ekbSb0TpFg@mail.gmail.com>

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On 9/24/12 5:01 PM, Ryan Stone wrote:
> Can you get the output of netstat -I emX -d?
...
>
> I suspect that you are seeing the em TX queue fill up.  If so you
> should see output drops reported by the em interface.
>
I do see 205 in the 'Drop' column.  I ran the command twice two hours 
apart... I am seeing Ierrsincrement in a 2 hours window...

#date && netstat -I em1 -d
Mon Sep 24 17:47:14 PDT 2012
Name    Mtu Network       Address              Ipkts Ierrs Idrop    
Opkts Oerrs  Coll Drop
em1    1500 <Link#2>      00:25:90:26:62:01 110170687801 4738950     0 
85411108876     0     0  205
em1    1500 X.X.X.X       coconut.coconut-g 111858     -     -  
6536889     -     -    -
em1    1500 fe80::225:90f fe80::225:90ff:fe        0     - -        
0     -     -    -

# date && netstat -I em1 -d
Mon Sep 24 19:48:44 PDT 2012
Name    Mtu Network       Address              Ipkts Ierrs Idrop    
Opkts Oerrs  Coll Drop
em1    1500 <Link#2>      00:25:90:26:62:01 110723416486 4768451     0 
85861866459     0     0  205
em1    1500 X.X.X.X coconut.coconut-g 119244     -     -  6558411     
-     -    -
em1    1500 fe80::225:90f fe80::225:90ff:fe        0     - -        
0     -     -    -

Checking all the interfaces, there are a lot more drops/Ierrs on em2...  
The igb devices (PCIe card) seem a lot better than the Supermicro 
motherboard em devices.  Is this an on-board vs mb thing, or em vs igb 
thing?

# date && netstat -id
Mon Sep 24 19:53:49 PDT 2012
Name    Mtu Network       Address              Ipkts Ierrs Idrop    
Opkts Oerrs  Coll Drop
em0    1500 <Link#1>      00:25:90:26:62:00 6887931271 844     0 
18966954063     0     0    0
em0    1500 X.X.X.X       coconut            1804123     -     - 
1962796     -     -    -
em0    1500 fe80::225:90f fe80::225:90ff:fe        0     - -        
1     -     -    -
em1    1500 <Link#2>      00:25:90:26:62:01 110745957108 4770615     0 
85882005650     0     0  205
em1    1500 X.X.X.Xcoconut.coconut-g   119573     -     -  6559700     
-     -    -
em1    1500 fe80::225:90f fe80::225:90ff:fe        0     - -        
0     -     -    -
igb0   1500 <Link#3>      00:1b:21:af:54:4e 53194278790 1169     0 
85861440371     0     0    0
igb0   1500 fe80::21b:21f fe80::21b:21ff:fe        0     - -        
1     -     -    -
igb1   1500 <Link#4>      00:1b:21:af:54:4f 43905355772 0     0 
24817874325     0     0    0
igb1   1500 fe80::21b:21f fe80::21b:21ff:fe        0     - -        
1     -     -    -
usbus     0 <Link#5>                               0 0     0        
0     0     0    0
usbus     0 <Link#6>                               0 0     0        
0     0     0    0
usbus     0 <Link#7>                               0 0     0        
0     0     0    0
usbus     0 <Link#8>                               0 0     0        
0     0     0    0
em2    1500 <Link#9>      00:25:90:26:62:02 2458414787 580252415422     
0 1640052168     0     0 37284
em2    1500 X.X.X.Xcoconut.guava-coc    93119     -     -   209407     
-     -    -
em2    1500 fe80::225:90f fe80::225:90ff:fe        0     - -        
2     -     -    -
em3    1500 <Link#10>     00:25:90:26:62:03 57160105 0     0 
87941536     0     0    0
em3    1500 X.X.X.XAS32329.weed-mb.c  1014267     -     -  1208726     
-     -    -
em3    1500 fe80::225:90f fe80::225:90ff:fe        0     - -        
1     -     -    -


Rudy




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