Polycom IP600 + PC share same switch port with VLAN
Submitted by Blue Tongue on Thu, 02/28/2008 - 10:37pm.
Hi all,
I have been googling and testing without any luck and would appreciate any guidance from anyone.
A port has already been configured on the CISCO switch with the following:
interface FastEthernet2/0/1
description VOIP VLAN 100
switchport access vlan 100
switchport mode access
duplex full
speed 100
I plugged the phone into the port and everything worked as far as VOIP is concerned.
Then I plug a PC into the PC port of the Polycom phone with the hope that I only need one port to support 2 devices.
(I wanted the VOIP phone to use VLAN 100 and PC just the native VLAN)
PROBLEM: However, I found that I could not get the PC (using DHCP) to get an IP address at all. It seems to be that the traffic from the PC is also tagged as VLAN 100 as well.
I was told by others that there is a setting on the Polycom phone which allows the traffic of the PC, under this type of settings, to go native.
Can anyone please help?
Assuming your data vlan is
Fri, 02/29/2008 - 9:06am
Assuming your data vlan is 10 - you would want your config to show as follows:
(you need two distinct vlans in the Cisco switch for this to work how you'd like.)
interface FastEthernet2/0/1
description VOIP VLAN 100
switchport access vlan 10
switchport mode access
switchport voice vlan 100
duplex full
speed 100
Polycom phones ship with CDP enabled by default, which allows them to communicate with the switchport and self configure to tag all voip traffic as 100, and data traffic would fall under vlan 10, which is untagged traffic.
No other config on the phone would be nescesary. Phone and data are two separate networks with this config.
The switchport is tagging/(trunking in the cisco world) vlan 100 and not tagging the data vlan 10.
Native vlans strip the vlan tag from the packet - so any vlan set as native would be untagged traffic.
[Solved]
Mon, 03/03/2008 - 10:58pm
Thanks for your suggestion.
Yours works for CISCO switches and turning CDP on the Polycom phones will help it to detect voice vlan.
As I may be working on other non-CISCO switches, I used another way to tackle the problem.
interface FastEthernet2/0/1
description VOIP VLAN 100
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,100
switchport mode trunk
duplex full
speed 100
Then by specifying the VLANID 100 on the phone, I was able to use one data port for both PC and phone.
Member Since:
2008-02-28