QoS question

[stevezups]

Hi all,

I wondering if it is possible to classify QoS based on VLAN's. What I would like to do is have a VLAN for video and a VLAN for internet. If this is possible then can you tell me how.

Thanks,

Stevan

[pkhatri]

Hi,

It depends on the platform that you are using. The Cat3550s do support per-VLAN qos.

Or is this for a router ?

Paresh

[stevezups]

This question was in regards to the Catalyst 3550.

How do you go about configuring it? How do you classify the VLAN in class-map, or is there a different way?

Thanks,

Stevan

[pkhatri · Accepted solution]

Hi Stevan,

YOu can do the following in a class-map:

class-map match-any dscp_cs1

match ip dscp 8

!

class-map match-all vlan_10

match vlan 10

match class-map dscp_cs1

The following caveats apply:

* You must use the match-all keyword with the class-map global configuration command for the class-map where you match on the VLAN

* Also, this class map must have two match commands in this order: one match vlan vlan-list class-map configuration command and one match class-map class-map-name class-map configuration command. The class map specified in the match class-map class-map-name command must be predefined and cannot contain the match vlan vlan-list and the match class-map class-map-name commands

* Within a policy map, when you use the match vlan vlan-list command, all other class maps must use the match vlan vlan-list command.

There's more info at:

http://www.cisco.com/en/US/products/hw/switches/ps646/products_configuration_guide_chapter09186a00802cb831.html

Hope that helps - pls rate the post if it does.

Paresh