2950 and 3550 Series Switches

2950 and 3550 Series Switches
The command switchport trunk allowed vlan remove vlan-list is used to limit which
VLANs can use a particular trunk:
Terry_2950(config)# interface fa 0/10
Terry_2950(config-if)# switchport trunk allowed vlan remove 2-10,12,15
Use a hyphen to show a contiguous range of VLANs that are to be excluded and use a comma
to separate VLANs that are not contiguous. Do not leave spaces. From the configuration, you
can see that the specified VLANs have been removed from the supported list:
Terry_2950#show run
Building configuration...
464 Chapter 14  VLANs, Trunks, and VTP
version 12.1
[output cut]
interface FastEthernet0/10
switchport trunk allowed vlan 1,11,13,14,16-1005
switchport mode trunk
no ip address