06-06-2013 03:01 PM - edited 03-04-2019 08:07 PM
Hello,
How do you know what peak averages to use in a Class Bass Shaping Mapping for QOS?
Thank you in advance,
Jay Swan
06-07-2013 05:24 AM
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.
06-07-2013 07:27 AM
Thank you for the explanation Vinayak.
Another question: what does the "service-policy pmmpls5" statement define?
Thank you,
Jay
06-07-2013 07:35 AM
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
06-07-2013 07:51 AM
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
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