From: Geir Jensen (geir@xxxxxxxxxx)
Date: Thu Nov 01 2001 - 07:45:22 GMT-3
t, bc, be, cir and peak relates like this:
t = bc / CIR, Peak = be/t
Since the default value for CIR is 56kbps and bc is 7kbps, the default
value for t (the measurement interval) is 125ms.
I also include "frame-relay adaptive-shaping becn" in the map-class
Geir Jensen
-----Original Message-----
From: Eddie
Sent: Thu 11/1/2001 7:44 AM
To: ccielab@groupstudy.com
Cc:
Subject: Frame-Relay Traffic Shaping (FRTS)
Here is the lab question:
1. Your service provider has a policy to mark all
traffic exceed 48 K with DE bit. BECN will be sent.
2. Your service provider will discard all traffic
exceed 64 K.
3. You have decided perform traffic control as
follows. When receive a BECN, lower the speed to 16K.
You must use Map Class with CIR, Be, Bc, MINCIR to do
this. Measuring interval is 125ms.
Here is my guess at a config from Caslow-p812:
Int s0
Frame-relay traffic shaping
frame-relay interface-dlci102
class test
map-class frame-relay test
Frame-relay cir 64000
Frame-relay bc 8000
Frame-relay be 16000
frame-relay mincir 48000
My questions are:
1) How do I change the measuring interval from the
default of 142 to 125ms
2) Is this enough to trigger when I receive a BECN or
do I need to apply the map-class to the interface?
3) I am confused as to how the cir, the bc, and the be
relate to each other.
Thanks in Advance.
Regards,
-Eddie
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