i have a problem of configuring mutli-vlan on cisco 2960s Switch, when i perform below command, all the switch port 1 - 23 will assigned to vlan 100, how do i perform vlan 1 & 100 together assigned on switch port from 1 - 23 ?
donjohnston, yes i agree, but you don't configure it as a trunk. to me, its like the exception that proves the rule. i agree its a trunk port, but the configuration looks like an access port. that is what I was referring to. but yes, access ports by definition are a single vlan only
EDIT: forgive me if I caused confusion with my statement
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You can make a trunk that only allows two VLANs.
int range Gi1/0/1 - 23
switchport trunk allowed vlan 1, 100
switchport mode trunk
In this case, VLAN 1 is the native (or untagged) VLAN.