[cisco-voip] Voice Vlan Configurations

Thu Aug 24 12:07:53 EDT 2006

Nick,

This is a really good question to ask since there are so many different
ways to configure QoS.  When we initially deployed QoS 4 years ago we
used a combination of Cisco QPM and a collection of configurations
pulled from documents, Cisco Press books, and industry peers.  As of
lately, we have been using the AutoQOS feature in all of our 3550
switches and have had great luck.

Here is an excerpt of how our voice ports are configured on our 3550.

interface FastEthernet0/1

 switchport access vlan 3

 switchport mode access

 switchport voice vlan 203

 switchport port-security maximum 3

 switchport port-security

 switchport port-security aging time 2

 switchport port-security violation restrict

 switchport port-security aging type inactivity

 no logging event link-status

 mls qos trust device cisco-phone

 mls qos trust cos

 auto qos voip cisco-phone 

 wrr-queue bandwidth 10 20 70 1

 wrr-queue min-reserve 1 5

 wrr-queue min-reserve 2 6

 wrr-queue min-reserve 3 7

 wrr-queue min-reserve 4 8

 wrr-queue cos-map 1 0 1

 wrr-queue cos-map 2 2 4

 wrr-queue cos-map 3 3 6 7

 wrr-queue cos-map 4 5

 priority-queue out

 spanning-tree portfast

 spanning-tree bpduguard enable

For your data ports if you remove your AutoQoS commands and remove your
voice VLAN, it will default to access mode.  Note that if you have a
phone plugged into this and the data VLAN can see the CallManagers, the
phone will still register.  You can also issue a "Show Parser Macro" to
see some of the pre-defined macros that Cisco has built by default for
different port types such as desktop, phone, desktop + phone, switch,
router, etc.

I am anxious to hear some of the rest of the lists input on there
methods and overall on AutoQoS in an all Cisco environment.

Thanks,

Matt

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Nick Kassel
Sent: Thursday, August 24, 2006 11:25 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Voice Vlan Configurations

There seems to be so many different ways to configure switch ports for
voice and data that I am not sure are configurations are correct.

This is the configs we have been using for our branch offices on 3560
switches, we have vlan 1 as our data vlan and vlan 2 as the voice vlan.

Port 24 is the trunk port to the router which has the WAN and voice
configurations.

Also what configurations should I use on ports that are just for data?

Voice Port

!

interface FastEthernet0/X

switchport voice vlan 2

 srr-queue bandwidth share 10 10 60 20

 srr-queue bandwidth shape  10  0  0  0

 mls qos trust device cisco-phone

 mls qos trust cos

 auto qos voip cisco-phone

 no mdix auto

 spanning-tree portfast

!

Router Port

!

interface FastEthernet0/24

 description Router Trunk Port

 switchport access vlan 2

 switchport trunk encapsulation dot1q

 switchport mode trunk

 srr-queue bandwidth share 10 10 60 20

 srr-queue bandwidth shape  10  0  0  0

 mls qos trust cos

 auto qos voip trust

!

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