rate-limit command, throttle bandwidth for testing

[ejonesx]

Hi,
We have a DS3 connection with Cisco 3725's on both ends. We are thinking of scaling back to a T1 on each end, and I am trying to figure out if it is possible to configure the routers to throttle the bandwidth (for testing of course) to simulate a T1 before we make the switch. I know the Packeteer devices can do it, but will the rate-limit command work?

 

[lambent]

rate-limit will drop packets when you're exceeding the limit and this may not reflect the actual situation where you have simple queueing and buffering on serial interfaces.

So maybe make a CBWFQ and make a class that represent anything and assign the T1 bandwidth to this class.

but of course rate-limit is much more simple if you don't care about packet dropping.

 

[ejonesx]

Packet dropping is OK. So, my interface is Serial1/0. Bandwidth is now 44210. Can someone help me with the command or set of commands that would rate-limit this interface to resemble a T1? Thanks.

 

[lambent]

The following is the legacy command for inbound and outbound rate-limit. Should be simple enough. Put them on the interface that you want to apply the rate-limit.

!
interface s0/0
rate-limit input 1536000 1000 2000 conform-action transmit exceed-action drop
rate-limit output 1536000 1000 2000 conform-action transmit exceed-action drop
!