Did some more QoS labs yesterday. I have completed roughly 50/80 labs so far. Here is a quick tip for looking at what policy-maps are assigned to interfaces.

Show run | i interface|service-policy

Here is a question for my readers.

I want to shape to an average rate of 512k. The Tc shoud be 10 ms. What command and parameters do I need to use? Post in comments.

QoS studies
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2 thoughts on “QoS studies

  • September 13, 2011 at 11:12 pm

    I love QoS 🙂
    2 ways to configure that :

    shape average 512000 5120


    R1(config)#int fa0/0
    R1(config-if)#band 512
    R1(config-if)#policy-map TEST
    R1(config-pmap)#class TEST
    R1(config-pmap-c)#shape average percent 100 10 ms

    And the verification!

    R1#sh policy-map inter fa0/0

    Service-policy output: TEST

    Class-map: TEST (match-all)
    0 packets, 0 bytes
    5 minute offered rate 0 bps, drop rate 0 bps
    Match: none
    Traffic Shaping
    Target/Average Byte Sustain Excess Interval Increment
    Rate Limit bits/int bits/int (ms) (bytes)
    100 (%) 10 (ms) 0 (ms)
    512000/512000 1280 5120 5120 10 640

    • September 14, 2011 at 8:28 am

      Good job!

      I agree. QoS is fun. Most people think they know QoS but they really don’t. If you are an expert in QoS I think that will be a very handy tool indeed. It gets very interesting when we start looking at egress queues of Catalyst switches and WTD 🙂


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