Should traffic control root qdisc & child class limit traffic?

Discussion in 'Linux Networking' started by Washington Ratso, Feb 24, 2011.

  1. I noticed that before I add client leaf classes that the value I set
    as the ceiling has no effect. For example, after putting in the
    following commands:

    tc qdisc add dev sat0 root handle 9997 htb default 9999 r2q 2
    tc class add dev sat0 parent 9997: classid 9997:9998 htb rate
    500000bit ceil 500000bit

    I can send over 3000000bits/sec with none of it being dropped. It
    looks like the 500000bit ceiling I defined is ignored. After I add
    client leaf classes below the root, I then see that packets are
    dropped when I try to exceed the ceiling.

    Is this behavior expected?
    Washington Ratso, Feb 24, 2011
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  2. Washington Ratso

    Andy Furniss Guest

    I guess this won't do anything alone because there is nothing to filter
    traffic to it. It should work if default was 9998 rather than 9999 - but
    beware when using default generally as it catches non ip traffic.
    Andy Furniss, Feb 25, 2011
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