3750X Stack. How to dedicate last switch to VoIP traffic only

[Kiwi123]

Hi Guys,

I have a 4-member 3750X PoE stack, IOS 15.2.
Configured 3 Vlans (Data, Voice and Video) with QoS traffic policies. Everything works fine as expected.

Question: For a special purpose, we want to add a new 3750X member to that stack while restricting its ports to Voice VLAN traffic exclusively, so only VoIP phones can be connected to these ports.

Note: We are using a 3rd party VoIP solution not Cisco Unified Comm.

* On a standalone switch, we can easily configure each port as a trunk using the command:
   # switchport trunk allowed vlan XYZ but in my case we are in a stack setup Any idea ?

Thank you

[marce1000]

  - That makes no difference, trunk port parameters are individual per port.

 M.

[Kiwi123]

Thank you marce1000, just wanted a confirmation in case I missed something

[pieterh · Accepted solution]

a stack config is no issue here ?
the only difference is in the port names where stack member nr is included in the port name

single switch / first stack member -> GigabitEthernet1/0/x
second stack member                  -> GigabitEthernet2/0/x
new / (fifth ?) stack member         -> GigabitEthernet5/0/x

my suggestion would be giving the ports an "access vlan xxx" where xxx is a vlan that is not forwarded/routed to other vlan's
if the  "third party devices" are compatible with CDP or LLDP , it may be  you can use "voice vlan xxx" ?

[Kiwi123]

Thnk you pietech   I'll try to implement this suggestion.