Understanding show policy-map interface xx

[c.valenti]

Hi all,

I need to understand the difference between "total drop" and "no-buffer drop" in the output:

Router#sh policy-map int gi 0/0

GigabitEthernet0/0

  Service-policy output: SHAPE-OUT

    Class-map: class-default (match-any)

      441790059 packets, 219164243756 bytes

      30 second offered rate 23718000 bps, drop rate 228000 bps

      Match: any

      Queueing

      queue limit 64 packets

     (queue depth/total drops/no-buffer drops) 0/3447160/0

      (pkts output/bytes output) 443857262/223879827364

      shape (average) cir 40000000, bc 160000, be 160000

      target shape rate 40000000

Many thanks

Cristiano

[Sandeep Choudhary]

HI Cristiano,

check out this link:

https://supportforums.cisco.com/thread/2159284

Regards

Please rate if it helps.

[c.valenti]

Thank you for your help,

I would finally understand if "total drops" are really dropped and lost or they are bufferized.

Thank you in advance.

[Sandeep Choudhary]

If you are satisfied with the answer then please mark as answered.

It may help for others.

Regards

Dont forget to rate the helpful posts.

[Raju Sekharan · Accepted solution]

You can have drops due to rasons below

1. WRED dropping the packet

2. You excceded the configured rate and you are buffering the packet and you have exceeded the configured queue limit.

3. You are exceeding the confgured rate, you are trying to buffer the packet. But you have not reached the configured queue limit, but there is no buffer available to allocate the configured queue-limit

Drops due to 3rd Reason will come as " no-buffer drops"

Drops due to all the above reasons, is Total drops

Thanks

Raju

***rate if the post helps*****