[c-nsp] silly qos question

[Aaron Riemer]

This is because you are trying to reserve more than 75% of the actual bandwidth. Remember that by default cisco allows 25% for the class default to allow for routing protocol and network management traffic etc.. It is possibly best to use bandwidth percent and priority percent to make this clear or if the interface is later upgraded etc. 

You can remove the class-default 25% restriction by the way but I cannot remember the command to do it sorry :) I am sure google will have the answer for you :)

Cheers,

Aaron.
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ryan
Sent: Thursday, 4 September 2008 3:07 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] silly qos question

Hey all,

Quick QoS question here. I seem to be having some trouble getting a policy applied to a Serial (T1) interface, and for the life of me don’t understand why. I’m pretty sure it’s my fault and not a “feature”.

Error I am getting when I try to apply the service policy direction output:

%INTERFACE_NAME% class Data-DSCP requested bandwidth 750 (kbps) Available only 656 (kbps)


Here are the class/policy map statements:

class-map match-any Control-DSCP
  match ip dscp cs3 
  match ip dscp af31 
class-map match-any Voice-DSCP
  match ip dscp ef 
class-map match-any Video-DSCP
  match ip dscp af41 
class-map match-any class-default
class-map match-any Data-DSCP
  match ip dscp default 

policy-map QoS-Policy-Office
  class Voice-DSCP
   priority 360
  class Video-DSCP
   bandwidth 128
  class Control-DSCP
   bandwidth 8
  class Data-DSCP
   bandwidth 750
  class class-default

If I bump bandwidth of class Data-DSCP down to 656 from 750, it applies with no backtalk. 

Clearly I am missing something on a conceptual level, here. Any help is appreciated. ☺

Platform:

7206VXR, NPE-G1 running 12.3(26) SP code.

Thanks!
-Ryan



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