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 (itll 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
alternative link download