From: Toh Soon, Lim (tohsoon28@gmail.com)
Date: Sun Aug 26 2007 - 18:03:19 ART
Hi All,
I need to configure GTS on a frame relay interface with target bit rate of
128Kbps & such that FECNs are reflected as BECNs.
I configured as follows:
!
int s 0/0/0
traffic-shape rate 128000
traffic-shape fecn-adapt
!
R2#sh run int s 0/0/0
!
interface Serial0/0/0
encapsulation frame-relay
traffic-shape rate 128000 7936 7936 1000
traffic-shape fecn-adapt
R2#sh traffic-sh
Interface Se0/0/0
Access Target Byte Sustain Excess Interval Increment Adapt
VC List Rate Limit bits/int bits/int (ms) (bytes)
Active
- 128000 1984 7936 7936 62 992 BECN
The router adds the other values in the running-config. Can anyone explain
how the router determines the values for sustain bits and excess bits? It
appears to me they are based on the formula CIR=Bc/Tc. But I'm only
providing the CIR value. How are the other values being calculated?
From Command Ref on DocCD,
An interval is calculated as follows:
* If the burst-size is not equal to zero, the interval is the burst-size
divided by the bit-rate.
* If the burst-size is zero, the interval is the excess-burst-size divided
by the bit-rate.
In my case, both my burst-size and excess-burst-size are unspecified.
Any comments are most welcome.
Thank you.
Confused,
Lim TS
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