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Cisco Switches


To show the VLANs and port assignments: show vlan brief

Trunk ports

If you're not sure which interfaces are set to trunk or not, try:

show interfaces trunk module 1

Show which VLANs are allowed on the trunk port:

show interfaces gigabitEthernet 1/0/24 trunk

If you want to specify which VLANs are allowed on the trunk port:

Note: If there is not a cable plugged in to the trunk port, it will say “Vlans allowed: none”

int gi1/0/24
switchport trunk allowed vlan 1,100

But if you don't specify, then it will allow all VLANs. (I think… but this is not confirmed)

kb/cisco_switches.1501650232.txt.gz · Last modified: 2017/08/02 14:33 by Dan Mundy