Class Based Shaping Question

[Robin Swan]

Hello,

How do you know what peak averages to use in a Class Bass Shaping Mapping for QOS?

Thank you  in advance,

Jay Swan                  

[Vinayaka Raman]

if your ISP says you are guaranteed 128kbps with no excess burst

shape average 128000

If the ISP will guarantee that the traffic rate is 64kbps and they can provide till 128kbps if there is no period of congestion in their network.

shape peak 64000 8000 8000

Generally i do it this way..my ISP gurantees with no excess burst.

policy-map traffic_Shaper

class class-default
  shape average percent 95
  service-policy pmmpls5

regards,

vinayak.

[Robin Swan]

Thank you for the explanation Vinayak.

Another question: what does the "service-policy pmmpls5" statement define?

Thank you,

Jay

[Vinayaka Raman]

it is optional..

the parent shapes to 95 perecent of CIR..

that is calling another child policy-map like this....

policy-map pmmpls5
class voice
  set dscp ef
  police cir 512000
   conform-action transmit
   exceed-action set-dscp-transmit af31
  priority 512
class traffic_control
  police cir percent 20
   conform-action set-dscp-transmit af31
   exceed-action set-dscp-transmit default
class af4x
  set dscp af31
  bandwidth remaining percent 40
class af3x
  set dscp af31
  bandwidth remaining percent 40
class af2x
  set dscp af21
  bandwidth remaining percent 15
class BE
  set dscp default
  bandwidth remaining percent 4

[Robin Swan]

Once again, thank you for the quick reply.

I also have radio's that use multicasting right now, but eventually they are moving them off to a digital and separate network.  However, for now, I need to pass the traffic.  All of it is going through physical interfaces right now, which are connecting through Microwave T1's.  Our Headquarters is the hub (7206 VXR), and it is connected to 9 endpoints.  They are all physical connections right now with 2 T1's per endpoint on a Multilink, so there are 4 line cards with 8 T1 ports per line card right now.  I am migrating to a fiber ring, and want to use sub interfaces so I will only need to connect to all 9 endpoints through 1 port from the 7206 to 1 port on the ISP's Ciena switch (they are going to provision us 100Mb).  However, the endpoints will only  be needing 1 physical connection which won't really be a problem.  If I do traffic shaping at the HQ router, will I need to also do it at the endpoints?

Here is what I have right now:

Class Map match-any SHORETELRADIO_VOIP
   Match access-group  101
   Match access-group  105
   Match ip  dscp ef

policy-map VOIPRADIO_POLICY
class SHORETELRADIO_VOIP
    priority percent 75
class class-default
  set dscp default
    fair-queue
     random-detect

When I attempt to apply the service-policy on the subinterface, I get the CBWFQ error.  That is how I found out that I need to do traffic shaping.

Thank you,

Jay