cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1284
Views
0
Helpful
5
Replies

Connecting Nexus 5000 to VSS

taelon_x7
Level 1
Level 1

Hello,

I tried to connect a new 5020 to our pair of 6500's that are running VSS. The VSS has been in production for a long time and has been working great. I created a new port-channel group on the VSS and bound two ten gig interfaces to it. I also did the same on the n5k and enabled VPC and LACP features. The problem is the VSS port-channel will never come up, it always shows a down state. Any ideas as to what configuration steps I am missing? Do I have to configure a VPC in order to communicate with the VSS??

1 Accepted Solution

Accepted Solutions

Only thing I can think of here is to remove all 'channel-group' commands from interface t1/1/1 and t2/1/1, then reconfigure using 'mode active'.  Not sure but if you were trying 1 at a time, so that 1 interface is using PAGP while other is LACP, that could have causes problems.

If that doesn't work I'd suggest the same thing, but also delete interface po11 before re-configuring.

View solution in original post

5 Replies 5

danrya
Level 1
Level 1

Can you attach the interface configurations from both sides for the physical ports and the portchannel port?

From the VSS side:

interface Port-channel11
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 411
switchport trunk allowed vlan 2,38,155,158,159,162-164,411,445,650,816,852-854
switchport trunk allowed vlan add 880,882,883,885-891,900
switchport mode trunk

interface TenGigabitEthernet1/1/1

switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 411
switchport trunk allowed vlan 2,38,155,158,159,162-164,411,445,650,816,852-854
switchport trunk allowed vlan add 880,882,883,885-891,900
switchport mode trunk
channel-group 11 mode auto

interface TenGigabitEthernet2/1/1

switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 411
switchport trunk allowed vlan 2,38,155,158,159,162-164,411,445,650,816,852-854
switchport trunk allowed vlan add 880,882,883,885-891,900
switchport mode trunk
channel-group 11 mode auto

From N5k:

interface port-channel11
  switchport mode trunk
  switchport trunk native vlan 411
  switchport trunk allowed vlan 2,38,155,158-159,162-164,411,445
  switchport trunk allowed vlan add 650,816,852-854,880,882-883,885-891
  switchport trunk allowed vlan add 900

interface Ethernet1/1
  switchport mode trunk
  switchport trunk native vlan 411
  switchport trunk allowed vlan 2,38,155,158-159,162-164,411,445
  switchport trunk allowed vlan add 650,816,852-854,880,882-883,885-891
  switchport trunk allowed vlan add 900
  channel-group 11 mode active

interface Ethernet1/2
  switchport mode trunk
  switchport trunk native vlan 411
  switchport trunk allowed vlan 2,38,155,158-159,162-164,411,445
  switchport trunk allowed vlan add 650,816,852-854,880,882-883,885-891
  switchport trunk allowed vlan add 900
  channel-group 11 mode active

When I change the channel-group mode on the VSS from auto to active, it changes back to auto for some reason??

Only thing I can think of here is to remove all 'channel-group' commands from interface t1/1/1 and t2/1/1, then reconfigure using 'mode active'.  Not sure but if you were trying 1 at a time, so that 1 interface is using PAGP while other is LACP, that could have causes problems.

If that doesn't work I'd suggest the same thing, but also delete interface po11 before re-configuring.

I will try that and let you know. Is there anything else you can think of? I will not be able to try this until our change night on Thursday so any suggestions ahead of time are greatly appreciated!

Thanks Chad! Starting from scratch on the port-channel did the trick.

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: