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Ajmal_2608's avatar
Ajmal_2608
Icon for Nimbostratus rankNimbostratus
Mar 02, 2013

Etherchannel with Nexus vpc, suggestions ?

Looking for best practices for configuring etherchannel/portchannle on a pair of 3900 (10.2, to be upgraded to 11.3 afterwards), these will connect to a Nexus 2248 (N5K core) vpc.

 

Suggestions please.

 

 

Also I would appreciate if someone can put their lab/configuration snippet so I can pick the usable ones (I don't have GUI access to the boxes only console)

 

config
design

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  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus
    Mar 03, 2013
    Works fine. The only diff between a normal channel and vpc (If we ignore the base vpc cnfig, peer links etc of the nexus) is the extra vlc vpcnum statement in the port-channel itself. I have 20Gbps (2x 10Gbps) vpc's to my viprions (n7010 cores). I do have a couple of 1600's on a VPC to 2248's with 7010 core as well though.

     

     

    H
  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus
    Mar 03, 2013
    Oh... You can't do routing protocols over vPC's... It's not supported (And worst case can have nasty effects like crashing your nexus).

     

     

    H
  • Ajmal_2608's avatar
    Ajmal_2608
    Icon for Nimbostratus rankNimbostratus
    Mar 03, 2013

    Thanks Hamish

     

     

    At this point we are not going to run any routing protocols, so I thing we should be good.

     

    Could you please suggest any configuration guideline for this ?

     

  • Ajmal_2608's avatar
    Ajmal_2608
    Icon for Nimbostratus rankNimbostratus
    Mar 10, 2013

     

    This worked for me

     

     

    trunk PO1 {

     

    interfaces 1.1

     

    interfaces 1.2

     

    }

     

     

    vlan external {

     

    tag 10

     

    trunks PO1

     

    }