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Configuring Voice Layer 3 on Cisco WLC WS-C3650


I am working on creating a voice vlan for our Cisco WLC that I have had setup and working well the past few years. We currently have some wirless 8821 phones and I want to create a separate vlan for this. Currently they are running on a layer 2 vlan but are having some voice collisions with the data on the wireless I beleive.


I have found some good documentation on aetting up the Layer 3 for this,  but have a question on the IP's for the Layer 3. In the example below for the layer 3 setup, What is the IP address refering to? Is this the switch IP or is this a static IP that I assign it to use on the port? Also, for the IP helper IP address what is this referring to? Would this be the same IP that I have already setup on the WLC?

Please see the bold text below;



Here is the example that I have.


CLI Example


1- Create the Layer 2 VLAN for Voice.

w-5760-3#conf t
w-5760-3(config)#vlan 100
w-5760-3(config-vlan)#name VoiceVLAN
w-5760-3#write mem

2- Create the Layer 3 interface for the voice VLAN.
w-5760-3(config)#interface vlan 100
w-5760-3(config-if)#no shut
w-5760-3(config-if)#ip address

w-5760-3(config-if)#description Voice VLAN

w-5760-3(config-if)#ip helper-address
w-5760-3#write mem


3- Add Vlan 100 on the uplink trunk connecting the WLC with the network

w-5760-3(config)#interface tenGigabitEthernet 1/0/1
w-5760-3(config-if)#switchport trunk allowed vlan 1,2,100

w-5760-3(config-if)#do sh run int te 1/0/1
interface TenGigabitEthernet1/0/1
 switchport trunk allowed vlan 1,2,100
 switchport mode trunk

 ip dhcp snooping trust



Thank you,


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