hi,
i have setup vpc for two hp servers which was working fine. but on vpc another server the first two went offline. i cant see any logs as to why the first two went offline and looking at the port-channel and vpc they both seem to be UP. Each server has 4 ports (two port (portchannelled) going to each nexus). The HP servers are teamed as automatic mode.
N7k1 -----------vPC peerlink-------------N7k2
| | | | | |
| | | | | |
| | |-------------HP1 Server (VPC10)--------| | |
| |---------------HP2 Server (VPC20)---------- | |
|-----------------HP3 Server (VPC30)-------------|
Config:
Nexus 7k 1
interface port-channel10
description HP server 1
spanning-tree port type edge
vpc 10
interface Ethernet101/1/1
description HP Server 1
flowcontrol send off
channel-group 10 mode active
no shutdown
interface Ethernet101/1/2
Desc HP Server 1
flowcontrol send off
channel-group 10 mode active
no shutdown
interface port-channel20
description HP server 2
spanning-tree port type edge
vpc 20
interface Ethernet101/1/3
description HP Server 2
flowcontrol send off
channel-group 20 mode active
no shutdown
interface Ethernet101/1/4
Desc HP Server 2
flowcontrol send off
channel-group 20 mode active
no shutdown
interface port-channel30
description HP server 3
spanning-tree port type edge
vpc 30
interface Ethernet101/1/5
description HP Server 3
flowcontrol send off
channel-group 30 mode active
no shutdown
interface Ethernet101/1/6
Desc HP Server 3
flowcontrol send off
channel-group 30 mode active
no shutdown
Nexus 2
Nexus 7k2
interface port-channel10
description HP server 1
spanning-tree port type edge
vpc 10
interface Ethernet101/1/1
description HP Server 1
flowcontrol send off
channel-group 10 mode active
no shutdown
interface Ethernet101/1/2
Desc HP Server 1
flowcontrol send off
channel-group 10 mode active
no shutdown
interface port-channel20
description HP server 2
flowcontrol send on
spanning-tree port type edge
vpc 20
interface Ethernet101/1/3
description HP Server 2
flowcontrol send off
channel-group 20 mode active
no shutdown
interface Ethernet101/1/4
Desc HP Server 2
flowcontrol send off
channel-group 20 mode active
no shutdown
interface port-channel30
description HP server 3
spanning-tree port type edge
vpc 30
interface Ethernet101/1/5
description HP Server 3
flowcontrol send off
channel-group 30 mode active
no shutdown
interface Ethernet101/1/6
Desc HP Server 3
flowcontrol send off
channel-group 30 mode active
no shutdown
The only difference i could find i highlighed above. I dont if flow control on/off will make a difference? what sort of teaming does the HP servers need ? for example if add another server and vpc this, then one of the above servers will break. i will have to shutdown the link of the broken server and no shut on port channel and then it will start to respond to ping. any thoughts why this would happen ?
Thanks
