Erratic outbound ping times on B200 UCS

richard.sandlan · ‎05-29-2014

Hi, I have UCS setup with 30 B200 M3s running ESXi 5.5, no issues. (see next post, same issue on ESX exists)

When installing 2008 R2 boot from iSCSI, I occasionally see errors in event log "The initiator could not send an iSCSI PDU" amongst others, indicating my iSCSI session was interrupted.

When pinging the default gateway from the server I see erratic pings. eg.

1ms

23ms

1ms

45ms

1ms

Anybody seen this before or have any ideas?

I have tried updating the network drivers to the latest versions.

richard.sandlan · ‎05-29-2014

Actually just checked and can see this behaviour from ESXi 5.5 too...

64 bytes from 10.0.30.1: icmp_seq=170 ttl=255 time=1.084 ms

64 bytes from 10.0.30.1: icmp_seq=171 ttl=255 time=0.860 ms
64 bytes from 10.0.30.1: icmp_seq=172 ttl=255 time=20.919 ms
64 bytes from 10.0.30.1: icmp_seq=173 ttl=255 time=0.938 ms
64 bytes from 10.0.30.1: icmp_seq=174 ttl=255 time=0.901 ms
64 bytes from 10.0.30.1: icmp_seq=175 ttl=255 time=1.044 ms

rosaho · ‎07-29-2015

This discussion has been reposted from Cisco User Groups to the Server Networking community.