Re: [nsp] Frame Relay question-CIR on a Cisco 2610

From: Stephen Sprunk (ssprunk@cisco.com)
Date: Mon Dec 17 2001 - 11:47:41 EST


Thus spake "Jim Brunetti" <brunetti@masergy.com>
> I am trying to set the CIR, Bc, and Be values on a Cisco 2610. I would
> like to set a low CIR and a high Be on a T1. When I set this on a Cisco
> 2610 running 12.2.6 with frame-relay traffic shaping (CIR of 56K, Be of
> 1536000 on a 1.5 Mb link), things are hunky dory until I go past the
> CIR. As soon I hit the CIR, the Cisco will start to queue packets in an
> output buffer and latency goes to hell. There is no other traffic on
> this line. Why does the Cisco ignore my Be and queue the packets? Why
> does it take so long for a 2610 to service a queue? This happens if I
> am running FIFO or Fair queuing. Any help would be appreciated.

There's a general misunderstanding about the way FRTS handles
cir/mincir/bc/be values. For a complete explanation, please see:

http://puck.nether.net/lists/cisco-nsp/5656.html

> map-class frame-relay test10
> no frame-relay adaptive-shaping
> frame-relay cir 64000
> frame-relay bc 600
> frame-relay be 1536000

This is what you want:

map-class frame-relay test10
 frame-relay cir 1536000
 frame-relay bc 15360
 frame-relay be 107520
 frame-relay mincir 64000
 frame-relay adaptive-shaping becn

S



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