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I am configuring a cisco 3550 inline power switch.  I am trying to configure ports 2 -24 to vlan 10 and 15.  When I put them in one vlan it takes them out of the other. How can I get them into both at the same time?
1 Solution
AkinsdNetwork AdministratorCommented:
A switchport can only be in 1 VLAN at a time.
I'm guessing you're trying to configure then for LAN and VOIP.

Assuming 10 is your LAN and 15 is your VOIP

Switch(config)#int range fa0/2 - 24
Switch(config-if-range)#switchport mode access
Switch(config-if-range)#switchport access vlan 10
Switch(config-if-range)#switchport voice vlan 15

If however VOIP is not your reason for this. Then you'll have to make one VLAN your native vlan

Switch(config-if-range)#switchport native vlan 15
Any untagged traffic will be treated as belonging to vlan 15
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