Traffic-shape 3750E - Shape Not active

[snarayanaraju]

Guys - Anybody do have experience configuring Traffic shape (GTS) using Cisco 3750E. I am using IOS 15.0SE.

Any point of time, even when my Network bandwidth goes 100% utilization, the shape never gets active. 

Do Traffic shape is supported in 3750E switches. 

interface gig 0/0
traffic-shape group 100 3000000 30000 0
access-list 100 permit any host 10.61.1.55

show traffic queue ----- no packets 

show traffic stat ---- active shape no

regards/ sairam

[Joseph W. Doherty]

I don't believe the 3750E supports the traffic-shape command.  Somewhat surprised it accepts the command.

You might be able to "shape" the port using srr-queue bandwidth limit weight1.

[snarayanaraju]

Thank you. I am using c3750e-universalk9-mz.150-1.SE3.bin image. Cisco Feature navigator shows it supports QoS Class-based shaping. Also the command i am seeing on the interface:

rtr01(config-if)#traffic-shape ?
group configure token bucket: group <access-list> CIR (bps) [Bc (bits) [Be
(bits)]]
rate configure token bucket: CIR (bps) [Bc (bits) [Be (bits)]]

Can i limit Outgoing Traffic (Egress) bandwidth based on the IP address?. Because i want to limit certain IP address using full of my bandwidth. Can i use SRR-QUEUE BANDWIDTH command ?

[Joseph W. Doherty]

My experience with 3750s has been with 12.2 versions, so it might be Cisco did add a shaper in 15.x.  If they did, again, I have no experience using it.

Traditionally (ver. 12.2), on this series, besides "shaping" the interface, you could shape individual egress queues (your mention of the srr-queue bandwidth [shape])]. So, if you directed one IP, or a set of IPs to such a shaped egress queue, you would effectively shape its traffic.

BTW, unless you have a need to really, really throttle a particular set of traffic, often a better QoS design is to prioritize your traffic, such that the less "important" traffic isn't adverse to the more "important" traffic.  The main advantage of such a design, the less "important" traffic can take advantage of otherwise unused/available bandwidth that would be precluded if you use a shaper (or policer).