VGMC "write to socket fail"

[pcat200]

The system is a CS1K M SG on Rls 6 with the latest patches applied.I have been seeing this error very intermittently, but it does disconnect all users using the card at the time. It has happened on 3 VGMC on two different loops. The 3 VGMC are connected to 2 different data switches. If I disable about 8 to 10 channels on the VGMC's the trouble does not occur.
My question is: Since the XMI error(card polling failure)occurs first, is it causing the ELAN to disable?

XMI001 4 0 10 EXUT
ELAN009 ELAN 0 host IP=172.16.210.17 disabled, write to socket
fail due to far end disconnect or Ethernet problems
SRPT091 HB: Remote side IPL health change from 18 to 16.
SRPT091 HB: Local side IPL health change from 18 to 16.
XMI002 4 0 10 EXUT
SRPT091 HB: Local side IPL health change from 16 to 18.
ELAN014 ELAN 0 host IP=172.16.210.17 is enabled
SRPT091 HB: Remote side IPL health change from 16 to 18.

Thanks,

 

[curtismo]

Check out the syslog on the VGMC. I would guess that the card is rebooting for some reason, which is why you are seeing the XMI001 error first, then the ELAN errors because the card has stopped processing packets. If this is happening on multiple cards/loops and you say you have the latest patches, I'd look for things such as broadcast storms on the ELAN or possibly some kinds of DDOS attack.

I'd also make sure that you really have the latest loadware and patches applied to the VGMC cards.

 

[Tman45]

We used to get these and a patch fixed ours, but we are having MC32S reboots. Curtismo is right though that it could be an ELAN issue or DDOS attack (damn hackers)

 

[pcat200]

Thanks for the replies. The troubleshooting continues............