[c-nsp] shaper in policy-map is not taken into account

[Velimir Filipov]

Hello,

When  the queues are full packet drop still occurs. 

So I suggest that there was a peak traffic at some point during that 30 sec period, which filled up the queue and resulted in dropped packets.

You can increase the queue size or the conform interval to achieve lower drop rates for peak traffic, but might result in longer delays.

Good luck.

--
Best regards,
Velimir Filipov
Network Administrator


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Thursday, March 13, 2014, 5:49:03 PM, you wrote:

> Hi,

> I have configured 20Mbps shaper("shape average 20000000") in
> SHAPER-EGRESS-TRAFFIC policy-map under class-default traffic class:

> В  Service-policy output: SHAPER-EGRESS-TRAFFIC

> В  В  Class-map: class-default (match-any)
> В  В  В  306585 packets, 88611267 bytes
> В  В  В  30 second offered rate 2107000 bps, drop rate 17000 bps
> В  В  В  Match: any
> В  В  В  Traffic Shaping
> В  В  В  В  В  В Target/Average В  Byte В  Sustain В  Excess В  В Interval В Increment
> В  В  В  В  В  В  В Rate В  В  В  В  В  Limit В bits/int В bits/int В (ms) В  В  В (bytes)
> В  В  В  В  В 20000000/20000000 В 125000 500000 В  В 500000 В  В 25 В  В  В  В 62500

> В  В  В  В  Adapt В Queue В  В  Packets В  Bytes В  В  Packets В  Bytes В  В  Shaping
> В  В  В  В  Active Depth В  В  В  В  В  В  В  В  В  В  В  В  Delayed В  Delayed В  Active
> В  В  В  В  - В  В  В 0 В  В  В  В  306384 В  В 88306481 В 6992 В  В  В 9487573 В  no

> В  В  В  Service-policy : VOIP-EGRESS-TRAFFIC-POLICY

> В  В  В  В  Class-map: VOIP-EGRESS-TRAFFIC-CLASS (match-all)
> В  В  В  В  В  0 packets, 0 bytes
> В  В  В  В  В  30 second offered rate 0 bps, drop rate 0 bps
> В  В  В  В  В  Match: access-group name VOIP-EGRESS-TRAFFIC-ACL
> В  В  В  В  В  Queueing
> В  В  В  В  В  В  Strict Priority
> В  В  В  В  В  В  Output Queue: Conversation 264
> В  В  В  В  В  В  Bandwidth 4500 (kbps) Burst 112500 (Bytes)
> В  В  В  В  В  В  (pkts matched/bytes matched) 0/0
> В  В  В  В  В  В  (total drops/bytes drops) 0/0

> В  В  В  В  Class-map: class-default (match-any)
> В  В  В  В  В  306585 packets, 88611267 bytes
> В  В  В  В  В  30 second offered rate 2107000 bps, drop rate 17000 bps
> В  В  В  В  В  Match: any


> During the last 30 seconds, policy-map has allowed traffic at 2.1Mbps
> in average and dropped 17kbps in average. Why is my policy-map
> dropping traffic while it should shape it? And shaping is configured
> to 20Mbps not around 2Mbps..



> regards,
> Martin
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