QOS shaping query

[s-sheffield]

Hi

I am just about finished designing a QOS solution and have one query with regards to the following command

srr-queue bandwidth shape 30 0 0 0

I am happy with what this command does and how the weights work.

I know the first weight is 1/30 of the interface bandwidth but what if this interface is on a throttled link?

My interface is a 1Gb sfp which links to a 1Gb National Ethernet network offered from one of my ISP's.

To keep costs down this 1Gb link has been software throttled to 100Mb.

I need my first shaped weight to be calculated on this 100Mb bandwidth.

**Could I use the bandwidth statement on the interface to help me get an accurate weight for my queue?**

I cant use the speed statement as the throttling takes place on the outgoing interface of the ISP's CPE

any help is always greatly appreciated.

Stuart

[Michael Kiessling]

Hi,

what hardware do you use?

(Most probably a switch, but which on e exactly?)

Regards,

Michael

[s-sheffield]

Hi Michael

I'm using a couple of 3560-48TS switches running IPSERVICES.

I've found out that the bandwidth statement will be ignored for what I was trying to do.

The shape command will do its calculation on the physical interface so I've adjusted my weights accordingly.

regards

Stuart

[Michael Kiessling]

Hi Stuart,

I'm not 100% sure, but AFAIK you cannot configure shaping on a 3500 switch as you can do on a router.

The only way to limit your traffic would be using policing in inbound direction (unfortunately outbound is not possible).

Regards,

Michael