From: Chris Lewis (chrlewiscsco@yahoo.com)
Date: Mon Oct 10 2005 - 10:39:07 GMT-3
What are your answers to these questions?
1. Policiing does not queue packets, shaping does, if you have a policer and a shaper configured for the same rate, will the shaper be able to queue packets?
2. Can you set actions based off rate for shaping? We know we can use the presence or lack of BECNs to control the transmission rate between CIR and mincir, but can you make arbitrary settings based on rate using shaping commands?
3. If you look at policing, can you set conditions for two rates using a single token bucket? Can you use Bc or Be values to guarantee that a given action will occur at a rate above the target policed rate for a single bucket system, regardless of how traffic is presented to the policer? In other words, with a single bucket system, can you constantly transmit at a rate above the policed rate if you set Bc and Be to any value?
4. How does this change with a two rate (meaning two token bucket) system?
start off with two routers connected, say you look at policing first, configure each of the following in a policy-map for class default, apply it outbound, then ping from this router with 0 timeout, 99999 repeat count and 0 interval.
Predict what will happen, and see if the results match your understanding by looking at the show interface command with load-interval set to 30.
police 64000 12000 conform-action transmit exceed-action set-prec-transmit 1
police 64000 12000 24000 conform-action transmit exceed-action set-prec-transmit 1 violate-action drop
Then try a two bucket system using the police cir xxx pir yyyy syntax and see what you can come up with.
Chris
dusth@comcast.net wrote:
Hi all,
I'm trying to configure a frame-relay traffic shapping with DE bit set and not sure if my syntax is correct. Here is the requirement maximum through put is 256kbps, if traffic excess of 96kps set them as de, tc is 125.
Should solution be "set-fr-de" with class-based shaping or "set-frde-transmit" with class-based policing?
policy-map frts
class class-default
police 96000 12000 244000 conform-action transmit exceed-action set-frde-transmit violate-action drop
map-clas frame-relay frts
frame-relay traffic-shaping becn
frame-relay cir 96000
frame-relay bc 12000
frame-relay be 244000
service-policy output frts
Please advice.
Dustin
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