Traffic Shaping on a 4948 ?

[kfarrington]

Hi All,

Does anyone have a view on the best method for traffic shaping on a 4948.

I have a CE router connected into a carrier cloud at 1000M and am buying a 10M service, carrier uses policing on their PE.

Now, how do I shape down to 10M on a 4948 interface?

If I have 1 meg of voice purchased and nothing else (all other traffic is BE, should I just set the priority queue to shape at 1M and set Queue 1 or whatever I am putting the rest of the BE packets in to shape at 9M?

ie,

!

interface GigabitEthernet1/4

tx-queue 1

shape 9M bps

tx-queue 3

priority high

shape 1M bps

!

Or can you do this as a top level interface command?

Many thx indeed,

Ken

[royalblues]

I think a nested policy would suit your needs

Create a parent policy which shapes all the traffic out of the interface to 10MB.

In the child policy, make sure you have prioritsed the voice as per the requirements

class-map match-all WAN-VOICE

match ip dscp ef

policy-map WAN-parent

class class-default

shape average 10000

service-policy WAN-child

Policy-map WAN-child

class WAN-VOICE

priority 1024

tx-queue 3

On the interface connecting to the CE

interface g 1/4

service-policy output WAN-parent

HTH

Narayan

[kfarrington]

Hi Narayan,

Thx for the reply.

The problem is that the 4948 does not support the shape command under a policy-map, and this is where I am becoming a tad confused as to the best way to do it?

If you or anyone else have done this on the 4948 sucessfully, pls let me know,

All the best and kind regards,

Ken