08-28-2008 11:31 AM - edited 03-06-2019 01:03 AM
Greetings,
I am having a weird issue with a port-channel interface. I am configuring a trunking interface to link up a switch with a VMWare ESX Server virtual switch. I have set up the trunking on the virtual side as well as on my physical switch. I am using 2 ports to create this channel. The problem is when I set up a continous ping from my Windows system, and monitor I am seeing some interesting results. When I add both ports to the channel, communication stops. When I remove one, communication starts up again through the port not in the channel. When I shutdown the port channel for several mins and open it up again, the pings go on for about a min before timing out. I am not sure whats going on. The channel configs match the physical interface configs. I would assume the trunking is set up correctly since it does work when not in the channel. Any help would be appreciated.
Thanks
08-28-2008 11:41 AM
Also...here are the configs from all interfaces.
Switch#show run int g1/44
Building configuration...
Current configuration : 289 bytes
interface GigabitEthernet1/44
description exstest3 (Po40 Member)
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 22
switchport trunk allowed vlan 20-22,220
switchport mode trunk
switchport nonegotiate
no cdp enable
spanning-tree portfast trunk
end
Switch#show run int gi2/1
Building configuration...
Current configuration : 288 bytes
!
interface GigabitEthernet2/1
description exstest3 (Po40 Member)
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 22
switchport trunk allowed vlan 20-22,220
switchport mode trunk
switchport nonegotiate
no cdp enable
spanning-tree portfast trunk
end
Switch#show run int po40
Building configuration...
Current configuration : 274 bytes
!
interface Port-channel40
description Trunk to ESXTest3
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 22
switchport trunk allowed vlan 20-22,220
switchport mode trunk
switchport nonegotiate
shutdown
spanning-tree portfast trunk
end
08-28-2008 11:48 AM
Brian,
You don't have the physical interfaces applied to the port channel. Try adding this to both interfaces Gi 1/44 and 2/1.
channel-group 40 mode on
HTH,
Mark
*Don't forget to do a "no shut" on int po40*
08-28-2008 11:52 AM
My apologies, to get the link up and working, I removed them. But when I had it set up, I did have the "channel-group 40 mode on" command applied to the two physical ports.
08-28-2008 12:04 PM
The interface configs look fine. Have you configured and verified the port channel on the server is configured properly?
08-29-2008 04:34 AM
Well we teamed the NIC's using the VM software. The team appears to be working fine. As I said, the port channel is the issue because when I pulled the ports our of the channel, the links come up with no problem. That leads me to believe the configuration is set up correctly. I am hoping that maybe I am missing something small but I am clueless.
08-29-2008 04:53 AM
hey brian, try various load-balancing options on the ESX side, I have had issues in the past with port-channels connected to ESX machines, go into the VMNics properties using the GUI and try load balancing using IP-source-destination or something along those lines, havent looked at it for awhile!
good luck
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