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Friday, March 30, 2012

Adding new Nexus 2K fabric extender

This step by step on how to add new Nexus 2000 (N2K) to Nexus 5000 (N5K)


Before apply, issue command sh fex and sh interface fex, this will show you fex is connected, but not online
  FEX         FEX           FEX                       FEX              
Number    Description      State            Model            Serial    
------------------------------------------------------------------------
---       --------             Connected     N2K-C2248TP-1GE   JAF1453BPRB

Then check to which interface this fex is connected to, sh interface fex
     Fabric      Fabric       Fex                FEX          
Fex  Port      Port State    Uplink    Model         Serial   
---------------------------------------------------------------
---   Eth1/12    Discovered     1    N2K-C2248TP-1GE  JAF1453BPRB


1.create new Fex instant
-use fex-id range number between 100-199
-choose 10G Ethernet ports

 fex <fex-id>
  pinning max-links <1-4>
  description <des..>

2.create new port channel and vPC

Interface port-channel <id>
 description <des..>
 switchport mode fex-fabric
 vpc <vpc-id>
 fex associate <fex-id created above>

3.bind port to the PO created above

interface Ethernet1/9
  description <des...>
  fex associate <fex-id>
  switchport mode fex-fabric
  channel-group <PO-id>

Example.



once finish issue command sh fex again to make sure the new fabric extender is online (it'll download image from N5K before it become fully online, may take some time)
FEX         FEX           FEX                       FEX              
Number    Description      State            Model            Serial    
------------------------------------------------------------------------
112  aus-b3-gp4-l9-fex12                Online     N2K-C2248TP-1GE   JAF1453BPRB

Usually each N5K in Austin only server 1 vlan, in this case we can just assign all the new port in one shot
interface ethernet 112/1/1 - 48
  switchport access vlan 2015
  spanning-tree port type edge
  spanning-tree bpdufilter enable

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