Check a Nexus Switch Port's VLAN Setting
In a Cisco Nexus fabric, use the following steps to check the VLAN membership for ports of a FEX.
Overall steps:
- Login to a Nexus switch in the fabric
- Use show FEX to locate the switch FEX number
- Check the interfaces on the FEX to see VLAN membership
Connect to one of the Cisco Nexus switches using ssh.
[mbraden@vm04 ~]$ ssh mbraden@LAB1-AS01-01A23
Find the fex number
LAB1-AG01-01A20# show fex
FEX FEX FEX FEX
Number Description State Model Serial
------------------------------------------------------------------------
100 LAB1-AS01-01A26 Online N2K-C2232PP-10GE SSI15......
101 LAB1-AS02-01A26 Online N2K-C2248TP-1GE SSI14......
102 LAB1-AS01-01A29 Online N2K-C2248TP-1GE SSI14......
103 LAB1-AS02-01A29 Online N2K-C2248TP-1GE SSI14......
104 LAB1-AS03-01A29 Online N2K-C2232PP-10GE SSI15......
105 LAB1-AS03-01A26 Online N2K-C2248TP-1GE SSI14......
106 LAB1-AS01-01A23 Online N2K-C2248TP-1GE SSI15......
107 LAB1-AS02-01A23 Online N2K-C2248TP-1GE SSI15......
LAB1-AG01-01A20#
The FEX number is:
106 LAB1-AS01-01A23
Now list the ports using the number of the FEX.
LAB1-AG01-01A20# show int status fex 106
--------------------------------------------------------------------------------
Port Name Status Vlan Duplex Speed Type
--------------------------------------------------------------------------------
Eth106/1/1 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/2 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/3 LAB1-AS01-01A23 connected 1209 full 100 --
Eth106/1/4 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/5 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/6 LAB1-AS01-01A23 connected 1209 full 100 --
Eth106/1/7 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/8 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/9 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/10 LAB1-AS01-01A23 connected 1209 full 100 --
Eth106/1/11 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/12 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/13 LAB1-AS01-01A23 connected 1206 full 1000 --
Eth106/1/14 LAB1-AS01-01A23 connected 1209 full 100 --
Eth106/1/15 LAB1-AS01-01A23 connected 1209 full 1000 --
Eth106/1/16 LAB1-AS01-01A23 connected 1209 full 1000 --
Eth106/1/17 LAB1-AS01-01A23 connected 1 full 1000 --
Eth106/1/18 LAB1-AS01-01A23 connected 1 full 1000 --
Eth106/1/19 LAB1-AS01-01A23 connected 1 full 1000 --
Eth106/1/20 LAB1-AS01-01A23 connected 1 full 1000 --
Eth106/1/21 LAB1-AS01-01A23 connected 1 full 1000 --
Eth106/1/22 LAB1-AS01-01A23 connected 1 full 1000 --
Eth106/1/23 LAB1-AS01-01A23 notconnec 1 auto auto --
Eth106/1/24 LAB1-AS01-01A23 notconnec 1 auto auto --
In this case, port 17 is on VLAN 1 which is not correct.