port not compatible [Slot in vpc A-A mode]

[eric.loiseau]

Hi all,

I have 2 N5K with 2 N2K configured like that

I am using the latest version 5.1(3)N2(1a)

When I created a port-channel on n5K I didn't have any problem, now when I created an other port-channel on the nexus 2k with the same configuration I have the message

port not compatible [slot in VPC A-A mode)

When I read the document this kind of configuration is supported , do I need to configure something else or to activate an other feature ?

thanks

Eric

[vdsudame]

Hi Eric

Yes, this topology is supported. Its called Enhanced VPC. When you build a port channel from n2k towards the server, do not include the 'vpc x' configuration under the port channel and it should work.

This is documented in our EVPC configuration guide at

http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/layer2/513_N2_1/b_Cisco_n5k_layer2_config_gd_rel_513_N2_1_chapter_01010.html

Thanks, Vinayak

[delahais]

Hello Eric,

I meet the same issue. Did you find a solve ?

many thx in advance.

Nicolas.

[aukhadiev]

Update:

I'm sorry, did not carefully read the answer from Vinayak Sudame

- "do not include the 'vpc x' configuration under the port channel and it should work"

In his reply, it's all said right

I do not quite clearly understood your situation, perhaps, as I understand you are trying to configure a Po2(channel to Server) as vPC channel?

Since you have a dual-home FEX configuration you need to configure Po2 as a standard etherchannel configuration on both switch:

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

interface e101/1-2

     channel-group 2 mode active

interface e102/1-2

     channel-group 2 mode active

interface port-channel2

      description Server

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

It is important to keep these configs identical on both switches! So I recommend doing this through switch-profile...

Look for a very good example http://nexusfu.blogspot.com/search/label/vpc

Finally, you should have, according to your schema, something like this:

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

interface port-channel101

      description FEX 101

      switchport mode fex-fabric

      fex associate 101

      vpc 101

interface port-channel102

      description FEX 102

      switchport mode fex-fabric

      fex associate 102

      vpc 102

interface e1/3-4

      switchport mode fex-fabric

      fex associate 101

      channel-group 101

interface e1/5-6

      switchport mode fex-fabric

      fex associate 102

      channel-group 102

interface e101/1-2

      channel-group 2 mode active

interface e102/1-2

     channel-group 2 mode active

interface port-channel2

      description Server

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

[cbell]

Thank you, I had the same problem, and removing the vpc from the port-channel interface fixed it for me!

Chris.

[Peter Koltl]

What model do you mean by 'N5K'? Enhanced vPC and this topology is not supported by Nexus 5010 and 5020, only by 55xx.