Two Nexus 5020 vPC etherchannel with Two Catalyst 6500 VSS

[jecheand]

Hi,

we are fighting with an 40 Gbps etherchannel between 2 Nx 5000 and 2 Catalyst 6500 but the etherchannel never comes up. Here is the config:

NK5-1

interface port-channel30

  description Trunk hacia VSS 6500

  switchport mode trunk

  vpc 30

  switchport trunk allowed vlan 50-54

  speed 10000

!

interface Ethernet1/3

  switchport mode trunk

  switchport trunk allowed vlan 50-54

  beacon

  channel-group 30

!

interface Ethernet1/4

  switchport mode trunk

  switchport trunk allowed vlan 50-54

  channel-group 30

NK5-2

interface port-channel30

  description Trunk hacia VSS 6500

  switchport mode trunk

  vpc 30

  switchport trunk allowed vlan 50-54

  speed 10000

!

interface Ethernet1/3

  switchport mode trunk

  switchport trunk allowed vlan 50-54

  beacon

  channel-group 30

!

interface Ethernet1/4

  switchport mode trunk

  switchport trunk allowed vlan 50-54

  beacon

  channel-group 30

********************************************************

********************************************************

Catalyst 6500 VSS

interface Port-channel30

switchport

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 50-54

!

interface TenGigabitEthernet2/1/2

switchport

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 50-54

channel-protocol lacp

channel-group 30 mode passive

!

interface TenGigabitEthernet2/1/3

switchport

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 50-54

channel-protocol lacp

channel-group 30 mode passive

!

interface TenGigabitEthernet1/1/2

switchport

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 50-54

channel-protocol lacp

channel-group 30 mode passive

!

interface TenGigabitEthernet1/1/3

switchport

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 50-54

channel-protocol lacp

channel-group 30 mode passive

The "Show vpc 30" is as follows

N5K-2# sh vpc 30

vPC status

----------------------------------------------------------------------------

id     Port        Status Consistency Reason                     Active vlans

------ ----------- ------ ----------- -------------------------- -----------

30     Po30        down*  success     success                    -         

But the "Show vpc Consistency-parameters vpc 30" is

N5K-2# sh vpc consistency-parameters vpc 30

    Legend:

        Type 1 : vPC will be suspended in case of mismatch

Name                             Type  Local Value            Peer Value            

-------------                         ----  ---------------------- -----------------------

Shut Lan                              1     No                     No                   

STP Port Type                    1     Default                Default              

STP Port Guard                  1     None                   None                 

STP MST Simulate PVST 1     Default                Default              

mode                                    1     on                     -                    

Speed                                  1     10 Gb/s                -                    

Duplex                                   1     full                   -                    

Port Mode                            1     trunk                  -                    

Native Vlan                           1     1                      -                    

MTU                                       1     1500                   -                    

Allowed VLANs                    -     50-54                  50-54                

Local suspended VLANs    -     -                      -         

We will apreciate any advice,

Thank you very much for your time...

Jose

[aijazbeigh]

Hi,

I have got two DCs. Each DC has a pair or 5596. We have setup VPC Peering within each DC between two 5596s

Now I need to connect two DCs to each other. I have connected them like  normal trunk ports. Is it possible If I can connect them together as  etherchannel using VPC at both ends. VPC domain at both DCs is  different.Is it possible to make 2 10gbps links one.

.

Regards

Aijaz

[Iker Santamaria Molla]

Hi,

first you need configure LACP mode active in VSS-N5k Port-Channel side and active or pasive in N5K-VSS.

Be sure that the vPC domain in N5K is different that the VSS domain.

The N5K has Bridge Assurance activated by default, therefore you has two ways:

     Configure both Port-Channels with "spanning-tree port type network", this is the Bridge Assurance  mode or

     Configure N5K Port-Channel with "spanning-tree port type normal".

We have it configured and working.

I hope I've helped.