Friend,

The 3750 supports SRR(shaped round robin) instead of WRR(weighted round robin)

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12225see/scg/swqos.htm#wp1284809

A typical configuration example would be

interface

mls qos trust dscp

queue-set 1

srr-queue bandwidth share 1 39 24 37

srr-queue bandwidth shape 5 0 0 0

priority-queue out

global config

mls qos map cos-dscp 0 8 18 26 34 46 48 56

!

mls qos srr-queue output cos-map queue 1 threshold 3 5

mls qos srr-queue output cos-map queue 2 threshold 3 6 7

mls qos srr-queue output cos-map queue 2 threshold 2 3

mls qos srr-queue output cos-map queue 2 threshold 1 4

mls qos srr-queue output cos-map queue 3 threshold 3 2

mls qos srr-queue output cos-map queue 4 threshold 3 0

mls qos srr-queue output cos-map queue 4 threshold 1 1

!

mls qos srr-queue output dscp-map queue 1 threshold 3 46 40

mls qos srr-queue output dscp-map queue 2 threshold 3 48 56

mls qos srr-queue output dscp-map queue 2 threshold 2 24 26 28 30

mls qos srr-queue output dscp-map queue 2 threshold 1 32 34 36 38

mls qos srr-queue output dscp-map queue 3 threshold 3 16 18 20 22

mls qos srr-queue output dscp-map queue 4 threshold 3 0

mls qos srr-queue output dscp-map queue 4 threshold 1 8 10

!

mls qos queue-set output 1 threshold 2 75 85 50 400

mls qos queue-set output 1 threshold 4 15 100 50 400

HTH, rate if it does

Narayan