QoS in Layer 2 Switch

[erpankajbhargava]

We are facing issue of high bandwidth utilization over switching network.

We have the multiple Leased line customers running in same scenario as attached:-

At switch port, interface in layer 2 configured i.e interface is in access mode, working in VLAN and bpdu filtering is enable only. Also, we have limit the customer bandwidth at router sub interface using rate-limit command.

Now, problem is router is limiting customer bandwidth, but from switch interface to router customer can used up to interface bandwidth i.e he is connected on 100Mbps port.All the unnecessary traffic originate from customer site can hit the router interface and thus our switching network gets choked. 

I want to know, what king of Layer 2 qos should I create on switch interface that I can restrict customer traffic(any traffic) so that my switch network doesn't affected due to customer's traffic. Thus, we can also avoid unnecessary wastage of bandwidth in switching network.

[Georg Pauwen]

Hello,

which switch is that on (e.g. 3750) ? Post the output of 'show version'...

[erpankajbhargava]

We are using 3550 and 3560.

[erpankajbhargava]

3550 & 3560

[Joseph W. Doherty]

QoS feature on switches vary widely, so as Georg also noted, we need to know what switch model(s) used.

That said, you might be able to apply an access port ingress policer.

[Joseph W. Doherty]

Ok, both a 3550 and 3560 should support CBWFQ policy ingress policers.

[erpankajbhargava]

Can u give me aa sample config for 2 nd 3 mbps bandwidth

[Joseph W. Doherty]

policy-map sample-ingress
class class-default
police 2000000

interface x
service-policy input sample-ingress

[erpankajbhargava]

Thnx Joseph,

If i am correct for 3Mbps it would be
policy-map sample-ingress
class class-default
police 3000000

and which version switches support this

[Joseph W. Doherty]

"If i am correct for 3Mbps it would be . . ."

Yes, correct.

For the 3750 we use IP Services 12.2(55)SE, although I believe it will be supported on IP only. Also should be supported on both earlier and later IOS versions.

For the 3550 we use IP Services 12.2(44)SE, although I also believe it might be supported on IP only and/or earlier IOS versions.