Cisco Nexus 9K Connection and FEX usage and Purpose

[prakashrajasekaran2807]

Hi i Need to Know the Usage of FEX connected towards Nexus and i have see the VPC configured between Nexus and FEX but what about client or individual port configuration required on FEX. as i understood FEX does not switch packets.

How servers need to be connected FEX and Can we do VLAN configuration in FEX.

[Sergiu.Daniluk · Accepted solution]

Hi @prakashrajasekaran2807 

Once you have a FEX connected and configured on your parent Nexus switch, all FEX interfaces facing the hosts (HIF ports - host interfaces) are listed in all show commands in this format <fex-id>/1/<port-number>.

Example:

+ you have FEX 101 connected and configured

+ FEX have 48 ports

+ All FEX ports are listed in "show running" and "show interface brief" as Eth101/1/1 ... Eth101/1/48

To configure them, you just have to enter into:

Nexus# conf t
Nexus(config)# interface eth101/1/1
Nexus(config-if)# <configure here what you want>

Stay safe,

Sergiu