06-26-2007 11:58 AM - edited 03-05-2019 04:59 PM
I'm installing Avaya IP phones on a Cat3560 (yes Avaya, I know..not my personal choice)
Avaya is requesting that 802.1p/Q should be enabled on the switch and each switch port should use prioritization scheme of 802.1p
What exactly do I need to configure on the 3560 switch to comform with the above request?
This is what I have configured right now:
mls qos map cos-dscp 0 8 16 24 32 46 48 54
mls qos
interface FastEthernet0/10
switchport access vlan 2136
switchport mode access
switchport voice vlan 3136
mls qos trust cos
spanning-tree portfast
Any additions needed?
Solved! Go to Solution.
07-12-2007 08:53 AM
Friend,
IP phones generally tag the voip packets as DSCP EF (ip prec 5) and signalling as CS3
When using a cisco phone all you need to do is use the voice vlan as below
interface FastEthernet0/10
switchport access vlan XX
switchport voice vlan YY
The phone and the switch dynamically negotiate a special trunk via CDP
In Case of Avaya phone, there is no CDP and hence most of the time you are asked to configure a dot1q trunk manually
interface FastEthernet0/10
switchport access vlan XX
switchport mode trunk
switchport trunk encapsulation dot1q
switchport trunk native vlan XX
switchport voice vlan YY
In switches like the 3550 the above config is required to make the voice vlan work.
But in the new 4500 switches i have seen the avaya ip phone working properly with the same set of commands that we used to configure for cisco
HTH
Narayan
06-26-2007 01:15 PM
Yes that should be good enough.
Well i have seen in many docs that avaya wants us to specifically configure the port as a dot1q trunk
interface range FastEthernet1/0/1
switchport access vlan 2
switchport trunk encapsulation dot1q
switchport trunk native vlan 2
switchport mode trunk
switchport voice vlan 20
And if you want to do some queue management as well you can configure SRR on the ports
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 6 7
mls qos srr-queue output cos-map queue 2 threshold 2 3
mls qos srr-queue output cos-map queue 2 threshold 1 4
mls qos srr-queue output cos-map queue 3 threshold 3 2
mls qos srr-queue output cos-map queue 4 threshold 3 0
mls qos srr-queue output cos-map queue 4 threshold 1 1
!
mls qos srr-queue output dscp-map queue 1 threshold 3 46 40
mls qos srr-queue output dscp-map queue 2 threshold 3 48 56
mls qos srr-queue output dscp-map queue 2 threshold 2 24 26 28 30
mls qos srr-queue output dscp-map queue 2 threshold 1 32 34 36 38
mls qos srr-queue output dscp-map queue 3 threshold 3 16 18 20 22
mls qos srr-queue output dscp-map queue 4 threshold 3 0
mls qos srr-queue output dscp-map queue 4 threshold 1 8 10
!
mls qos queue-set output 1 threshold 2 75 85 50 400
mls qos queue-set output 1 threshold 4 15 100 50 400
And on the phone ports
queue-set 1
srr-queue bandwidth share 1 39 24 37
srr-queue bandwidth shape 5 0 0 0
priority-queue out
HTH, rate if it does
Narayan
07-12-2007 08:04 AM
Thank you for responding to my question. I was away and couldn't check it.
But I have a follow-up question:
Avaya tells me to enable 802.1P/Q on each switchport.
How do i do that?
If I apply the following command:
switchport voice vlan 3136 dot1p
According to Cisco it means the following:
dot1p?Configure the Cisco IP Phone to use 802.1P priority tagging for voice traffic and to use the default native VLAN (VLAN 0) to carry all traffic. By default, the Cisco IP Phone forwards the voice traffic with an 802.1P priority of 5
But I don't want to use VLAN 0 to carry all my other traffic.
So, I'm a bit confused as to how to enable 802.1Q/P on my Layer 2 switch.
07-12-2007 08:53 AM
Friend,
IP phones generally tag the voip packets as DSCP EF (ip prec 5) and signalling as CS3
When using a cisco phone all you need to do is use the voice vlan as below
interface FastEthernet0/10
switchport access vlan XX
switchport voice vlan YY
The phone and the switch dynamically negotiate a special trunk via CDP
In Case of Avaya phone, there is no CDP and hence most of the time you are asked to configure a dot1q trunk manually
interface FastEthernet0/10
switchport access vlan XX
switchport mode trunk
switchport trunk encapsulation dot1q
switchport trunk native vlan XX
switchport voice vlan YY
In switches like the 3550 the above config is required to make the voice vlan work.
But in the new 4500 switches i have seen the avaya ip phone working properly with the same set of commands that we used to configure for cisco
HTH
Narayan
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: