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Community Member

Trunking on older 3500XL switches

I probably already know the answer to this but is there a way to remove vlans 1 and 1002-1005 on a trunk port on a 3548-XL? I want to be able to connect an IP phone to the port and only allow traffic from my voice and the floor vlans (599 & 730) respectively. But when I run the command:

switchport trunk allowed vlan remove 1-598,600-729,731-1024

all the vlans are removed exept 1,599,730,1002-1005. I know that these are "special" vlans and these are older switches, but is there a way to remove them from a port on these switches?


Re: Trunking on older 3500XL switches

you can;t clear the default vlans on this platform. However, if you are connecting it to a switch that does you can clear it on that side. As far as I know only cat6000 will allow you to remove vlan 1 from the trunk port.

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Community Member

Re: Trunking on older 3500XL switches

try changing the native vlan to something other than vlan 1

Re: Trunking on older 3500XL switches

If you want to configure the port for just voice vlan and data vlan then you need not to clear vlans out of the trunk, just configure voice vlan. This platform should support voice vlan. for example:

interface FastEthernet0/2

description DOT1Q port to IP Phone

switchport trunk encapsulation dot1q

switchport trunk native vlan 730

switchport mode trunk

switchport voice vlan 599

spanning-tree portfast

For more information:

From 3500XL port configurations guide:

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