04-06-2007 12:33 PM - edited 03-03-2019 04:27 PM
I am setting up the above for Avaya phones. The sites with separate router/switch combos work fine.
The FA port settings are as follows:
!
interface FastEthernet1/2
description * Data/Voice Vlan's *
switchport access vlan 20
switchport voice vlan 852
mls qos trust dscp
spanning-tree portfast
We have 2 Vlan interfaces set up - 1 for voice and one for data. (20 is data and 852 is voice.
If I plug a laptop in, I get an IP address from the off-site DHCP server.
If I plug the phone in, it get the Vlan number (852) from the scope option properly.
If I change the port to
switchmode access vlan 852
and plug the laptop in, I get a voice IP address.
If I plug the phone in, it gets it's voive IP address and loads it's config. But I can't get a data IP for the PC.
I do a show vlan-sw and see that all of the ports are assigned to Vlan 20 but none are co-assigned to Vlan 852.
The 3550's, 3750's, etc. at other sites have both Vlan's assigned to each port.
What am I missing?
Thanks,
Tom
But on this setup, when I do a sho vlan-sw,
04-06-2007 01:00 PM
Try a config such as the following:
interface FastEthernet1/2
description * Data/Voice Vlan's *
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk native vlan 20
switchport voice vlan 852
mls qos trust dscp
spanning-tree portfast
Hope this helps. If so, please rate the post.
Brandon
04-09-2007 05:32 AM
Thanks.
I loaded this config this morning remotely. I still do not see the interface in the vlan table. It is now in VLAN 1
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa1/2
20 VLAN_20 active Fa1/1, Fa1/3, Fa1/4, Fa1/5, Fa1/6, Fa1/7, Fa1/8, Fa1/9, Fa1/10
Fa1/11, Fa1/12, Fa1/13, Fa1/14, Fa1/15, Fa1/16, Fa1/18, Fa1/19
Fa1/20, Fa1/21, Fa1/22, Fa1/23, Fa1/24, Fa1/25, Fa1/26, Fa1/27
Fa1/28, Fa1/29, Fa1/30, Fa1/31, Fa1/32, Fa1/33, Fa1/34, Fa1/35
852 VLAN_852 active Fa1/0
Doing a show int fa 1/2 trunk gives me this:
Port Mode Encapsulation Status Native vlan
Fa1/2 on 802.1q not-trunking 20
Port Vlans allowed on trunk
Fa1/2 none
Port Vlans allowed and active in management domain
Fa1/2 none
Port Vlans in spanning tree forwarding state and not pruned
Fa1/2 none
The site is an hour or so away. I am heading over ther now to see if the phone works in spite of not seeing the voice vlan on the interface.
Any ideas on why this is?
Thanks,
Tom
04-09-2007 05:23 PM
All is working .. Thanks. Still not sure why it shows in Vlan 1 though.
04-06-2007 01:11 PM
When you use the command "switchportmode access vlan 852", you basically assign that port to have access to vlan 852 ONLY - that's why you get the voice's ip address when you plugged your laptop in this port.
You should use this config:
switchport mode access
switchport access vlan 20
switchport voice vlan 852
hth,
hieu
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