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New Member

Bandwidth on Ethernet

Hi,

I have a fast ethernet link to our ISP box. Our guranteed service is only 30Mbps.

What is the best way to configure our fast ethernet interface to limit traffic to 30Mbps?

Thanks,

5 REPLIES
Hall of Fame Super Blue

Re: Bandwidth on Ethernet

You need to use shaping on your ethernet interface ie.

class-map match-all Class_Default

match any

!

!

policy-map WAN_Shape

class Class_Default

shape average 30000000

int fa0/1

service-policy output WAN_Shape

The ISP will probably police the traffic on their end but you are better off using shaping as it is a bit less drastic.

Jon

Super Bronze

Re: Bandwidth on Ethernet

Another option, your Ethernet interface might support GTS, e.g. "traffic-shape rate 30000000". However, I endorse Jon's suggestion of using CBWFQ for future QoS options.

PS:

BTW: class-default is an implict class, you shouldn't need to define a class-map for it.

Hall of Fame Super Blue

Re: Bandwidth on Ethernet

"BTW: class-default is an implict class, you shouldn't need to define a class-map for it."

I know, i just thought it would be a better example rather than just a shape statement under the policy-map. Looking at it now you may have a point :-)

Jon

Super Bronze

Re: Bandwidth on Ethernet

It is a fine example, postscript was directed to other readers, such as perhaps OP, who might not have been aware of the fact.

New Member

Re: Bandwidth on Ethernet

Thanks all.

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