[c-nsp] Share a shaping policy (+ provide committed BW)

Spyros Kakaroukas skakaroukas at rolaware.com
Wed Jan 28 06:26:08 EST 2015


You could probably use a hierarchical configuration like the following :

class-map CM_UNIT1
 match <whatever>
class-map CM_UNIT2
 match <something>
policy-map PM_BLAH_CHILD
 class CM_UNIT1
  bandwidth percent 20
 class CM_UNIT2
  bandwidth percent 20
policy-map PM_BLAH_PARENT
 shape average 25000000
 service-policy PM_BLAH_CHILD

Depending on your requirements, reserving the entirety of the bandwidth may or may not be a good idea. You might also have to change the maximum reservable bandwidth on the interface. You might also want to play with the queue depth on the parent if you find that the default values do not suit your needs.

My thoughts and words are my own.

Kind Regards,


-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of CiscoNSP List
Sent: Wednesday, January 28, 2015 3:31 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Share a shaping policy (+ provide committed BW)

Hi Everyone,

Scenario is this:

Site has five housing units that want to "share" a 25Mb Internet connection - Simple solution, is to connect them all to something like a 2921, shape the Internet service to 25Mb, and they can all use the 25Mb (FIFO)....but, they would like to have a committed 5Mb each (So they are all guaranteed 5Mb), but if no-one else is using the service, be able to burst to 25Mb(Or whatever BW is available)....Is this possible?  i.e. Individual shaping policies(giving 5Mb, but high burst) wouldnt work, as the policies wouldnt be "aware" of what the other Interfaces were doing?

Does anyone have any suggestions on how this could be achieved?

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