Re: No buffer space available

[Peter Eisch <peisch%gmail.com@localhost>]

On 9/9/12 8:00 PM, "Greg Troxel" <gdt%ir.bbn.com@localhost> wrote:

> 
>   What's my path to fix problems like this?
> 
>   Sep  9 16:41:51 mouse ospfd[602]: *** sendmsg in ospf_write failed to
>   224.0.0.6, id 0, off 0, len 604, interface vlan511, mtu 1500: No buffer
>   space available
> 
> are packets going out?   One thing that can cause that message is an
> ethernet that won't send packets (or sends very slowly), causing the
> output queue to fill up and then overflow.

There's some traffic, less than 10Mb/s on the interface though I've seen it
peak at over 30Mb/s:

mouse# ifconfig wm1
wm1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        
capabilities=2bf80<TSO4,IP4CSUM_Rx,IP4CSUM_Tx,TCP4CSUM_Rx,TCP4CSUM_Tx,UDP4CS
UM_Rx,UDP4CSUM_Tx,TCP6CSUM_Tx,UDP6CSUM_Tx>
        enabled=0
        address: 00:04:23:a9:3f:69
        media: Ethernet autoselect (1000baseT
full-duplex,flowcontrol,rxpause,txpause)
        status: active
        inet w.x.y.z netmask 0xffffff00 broadcast 10.6.1.255
        inet6 fe80::204:23ff:fea9:3f69%wm1 prefixlen 64 scopeid 0x2
mouse# 

And on the switch:

Gi1/41    wm1.mouse.sdfm.vis connected    trunk      a-full a-1000
10/100/1000-TX
...
  5 minute input rate 4987000 bits/sec, 1569 packets/sec
  5 minute output rate 4996000 bits/sec, 1574 packets/sec
...

There are several VLANs on the inteface but it's presently the only
interface being used on the system.

mouse# netstat -m
266 mbufs in use:
        258 mbufs allocated to data
        8 mbufs allocated to packet headers
0 calls to protocol drain routines
mouse# netstat -s
...
udp:
        1137709 datagrams received
        0 with incomplete header
        0 with bad data length field
        0 with bad checksum
        1899 dropped due to no socket
        37425 broadcast/multicast datagrams dropped due to no socket
        0 dropped due to full socket buffers
        1098385 delivered
        598423 PCB hash misses
        1373717 datagrams output
...

Oddly, on the system right beside it doing pretty much the same firewalling:

... 
udp:
        50119461 datagrams received
        0 with incomplete header
        6 with bad data length field
        10 with bad checksum
        37859 dropped due to no socket
        0 broadcast/multicast datagrams dropped due to no socket
        0 dropped due to full socket buffers
        50081586 delivered
        26341176 PCB hash misses
        60463668 datagrams output
...

The mouse system just seems to hate the multicast and I need it to stop
this.  (both 5.1 systems, i386, Dell 1850)

Maybe it's hardware?  The box was happy for years but just started flaking
out.

peter