From: Petr Lapukhov (petrsoft@gmail.com)
Date: Wed May 24 2006 - 13:11:52 ART
I guess Cisco just wanted to make it in the most simple way :)
That is, I think they did'nt want their parser to be ultra-smart and
look for _actual_ adaptive shaping being configured with good old
legacy FRTS :) If you dont have minCIR configured, it is set to CIR/2,
and CBWFQ bandwith is allocated accordingly.
Note please, that this relates only to legacy FRTS (frame-relay cir)
configuration.
As for MQC FRTS, CBWFQ correctly claims it's bandwith either from
"shape adaptive" of "shape average" if adaptive shaping is not configured.
----map-class frame-relay FR_TEST service-policy output SHAPE
policy-map CBWFQ class class-default bandwidth percent 100
policy-map SHAPE class class-default shape average 512000 shape adaptive 256000 service-policy CBWFQ
interface Serial0/1 encapsulation frame-relay frame-relay class FR_TEST ... --- So with "shape adaptive" configured:
Rack1R1#show policy-map interface serial 0/1 Serial0/1: DLCI 102 -
Service-policy output: SHAPE
Class-map: class-default (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Traffic Shaping Target/Average Byte Sustain Excess Interval Increment Rate Limit bits/int bits/int (ms) (bytes) 512000/512000 3200 12800 12800 25 1600
Adapt Queue Packets Bytes Packets Bytes Shaping Active Depth Delayed Delayed Active BECN 0 0 0 0 0 no
Service-policy : CBWFQ
Class-map: class-default (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Queueing Output Queue: Conversation 41 Bandwidth 100 (%) Bandwidth 256 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0 (depth/total drops/no-buffer drops) 0/0/0 --- and WITHOUT "shape adaptive" configured:
Rack1R1#show policy-map interface serial 0/1 Serial0/1: DLCI 102 -
Service-policy output: SHAPE
Class-map: class-default (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Traffic Shaping Target/Average Byte Sustain Excess Interval Increment Rate Limit bits/int bits/int (ms) (bytes) 512000/512000 3200 12800 12800 25 1600
Adapt Queue Packets Bytes Packets Bytes Shaping Active Depth Delayed Delayed Active - 0 0 0 0 0 no
Service-policy : CBWFQ
Class-map: class-default (match-any) 0 packets, 0 bytes 5 minute offered rate 0 bps, drop rate 0 bps Match: any Queueing Output Queue: Conversation 41 Bandwidth 100 (%) Bandwidth 512 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0 (depth/total drops/no-buffer drops) 0/0/0 --
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