From: Abidin Kahraman (kahramana@xxxxxxxxxxxxxxx)
Date: Mon Jun 24 2002 - 06:33:24 GMT-3
Dear All,
i`ve also confused on FRTS, my understanding about FRTS is shown below if i
am wrong please corect me..
** Frame-relay adaptive-shaping BECN --> If you are not connected to IGX or
BPX you have to use this command..(is it necessary for all configs?)
** Frame-relay cir --> Set this speed to be the physical port speed of the
local circuit.
** Frame-relay bc --> This is the amount of data sent per interval. Cisco
default is 1/8 CIR of the remote circuit.
** Frame-relay be --> This is the number of extra bits remaining from
previous burst that will be sent on the first interval. This should not
exceed the port speed of the remote router..
** Frame-relay mincir --> This is what the VC will throttle down to when it
receives BECNs. Set this value to the actual CIR that the carrier provides
to you.
With the above explanations, i`ve prepared a template config..
Map-class frame-relay XX
Frame-relay adaptive shaping becn
Frame-relay cir [local port speed]
Frame-relay bc [remote port speed / 8] (if time interval is 125ms)
Frame-relay be [remote port speed]
Frame-relay mincir [carrier provided actual CIR]
If any advise, i will be really appreciated..
Abidin.
-----Original Message-----
From: Ahmed Mamoor Amimi [mailto:mamoor@ieee.org]
Sent: Saturday, June 22, 2002 10:59 AM
To: ccielab@groupstudy.com
Subject: FRTS
The more i learn the more i get confused on FRTS.
i am taking this from scratch !!
what is EIR :
As per my understanding
EIR = CIR - minCIR
Total bucket = CIR + Be
and Be = EIR (at 1 sec)
is the above correct !!
now i am taking an example :
i want to buy 64k link and must be able to burst on a double when FR is
free :
So my maths will be :
minCIR = 64k
CIR = 128k
Tc = 0.125
Bc = minCIR * 0.125
Be = CIR * 0.125
Now i have 2 way to feed the values into my router
1 - by giving the seprate values in map-class
2 - by using "frame-relay traffice-rate"
1 -
map-class frame-relay FRTS-1
frame-relay cir 128000
frame-relay be 16000
Interface Se0
Access Target Byte Sustain Excess Interval Increment Adapt
VC List Rate Limit bits/int bits/int (ms)
(bytes)
Active
100 128000 4000 128000 16000 125 2000 -
2 -
map-class frame-relay FRTS-2
frame-relay traffic-rate 128000 144000 <---- CIR + (CIR + (Be or EIR) )
that is 128000 + 16000 = PEAK
no frame-relay adaptive-shaping
Interface Se1
Access Target Byte Sustain Excess Interval Increment Adapt
VC List Rate Limit bits/int bits/int (ms)
(bytes)
Active
200 128000 4000 128000 16000 125 2000 -
Please confirm if the above configs are correct !!
-Mamoor
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