voice QOS with Etherswitch module across the WAN

trienguy · ‎05-27-2008

Hi all

My customer has been using Etherswitch module as layer two for their WAN links.

I know there is a limitation for ESW

where you can't applied the Service policy out to the fastethernet ports.

so the only way we can do it is through the layer queueing.

wrr-queue as guided in this example

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Router1(config)#wrr-queue cos-map 1 0 1

Router1(config)#wrr-queue cos-map 2 2

Router1(config)#wrr-queue cos-map 3 3 4

Router1(config)#wrr-queue cos-map 4 5 6 7

!--- wrr-queue cos-map <queue-number> <cos values separated by space>

Router(config)#wrr-queue bandwidth 1 16 64 255

!--- wrr-queue bandwidth <Weight of Queue1> <Weight of Queue2>

!--- <Weight of Queue3> <Weight of Queue4>

----------------------------------------

I have tried it on the customer's router

however it says "not configurable on slot 0"

if it is not configurable how do we can achieve voice qos on the ESW module ?

--------------------------

(config)#wrr-queue cos-map 1 0 1

cos-map not configurable on the card in slot 0

The default cos map is:

CoS Value : 0 1 2 3 4 5 6 7

Priority Queue : 1 1 2 2 3 3 4 4

MEL-570-RO2(config)#wrr-queue cos-map 4 5 6 7

cos-map not configurable on the card in slot 0

The default cos map is:

CoS Value : 0 1 2 3 4 5 6 7

Priority Queue : 1 1 2 2 3 3 4 4

MEL-570-RO2(config)#---------------------------------

Thanks all for your feedback

irisrios · ‎06-02-2008

Do not attach a service policy to a port that is a member of an EtherChannel. Although the CLI allows you to configure PFC-based QoS on the WAN ports on the ATM OSMs and on the WAN ports on the channelized OSMs, PFC-based QoS is not supported on the WAN ports on these OSMs. OSMs are not supported on some switches that are configured with a Supervisor Engine 32. PFC QoS supports the optional output keyword only on VLAN interfaces. You can attach both an input-policy map and an output-policy map to a VLAN interface.

http://www.cisco.com/en/US/prod/collateral/routers/ps259/product_data_sheet09186a00801aca3e.html

trienguy · ‎06-02-2008

Hi Irisrios

I have tried it by applying the service policy under the vlan but the packets doesn't match ..even though you can see it has hit the access-list.

please try it on a router and you can see what i meant.. it doesnt' seem the card supported the voice qos configuration on layer 2 ie wrr-queue command is not configurable.

Thanks again for your reply.