Switch IGMP subscription delays

Discussion in 'Cisco' started by Marc Leeman, Sep 22, 2004.

  1. Marc Leeman

    Marc Leeman Guest

    We have a Catalyst 3550 (12.1(2))switch and the following setup:

    Several embedded GNU/Linux systems (busybox/2.4.27) are connected directly
    to the switch. One of these systems is connected to a hub, which is in
    turn connected to the same switch. The hub is not connected to the
    multicast clients, but has several other (non IGMP based) connections.

    When everything is reset (reboot), the systems connected directly to the
    switch can take up to 60" to get subscripted to a Multicast address,
    while the system connected via the hub, synchronises much faster.

    Does anyone have an idea what this might be or if this is actually
    caused by the switch?
     
    Marc Leeman, Sep 22, 2004
    #1
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  2. Hello, Marc!
    You wrote on 22 Sep 2004 08:08:24 GMT:

    ML> We have a Catalyst 3550 (12.1(2))switch and the following setup:

    ML> Several embedded GNU/Linux systems (busybox/2.4.27) are connected
    ML> directly to the switch. One of these systems is connected to a
    ML> hub, which is in turn connected to the same switch. The hub is
    ML> not connected to the multicast clients, but has several other
    ML> (non IGMP based) connections.

    ML> When everything is reset (reboot), the systems connected directly
    ML> to the switch can take up to 60" to get subscripted to a
    ML> Multicast address, while the system connected via the hub,
    ML> synchronises much faster.

    ML> Does anyone have an idea what this might be or if this is
    ML> actually caused by the switch?

    Do you have portfast enabled on switch ports?

    With best regards,
    Andrey.
     
    Andrey Tarasov, Sep 24, 2004
    #2
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  3. Marc Leeman

    Marc Leeman Guest

    Do you have portfast enabled on switch ports?

    Hang, this was the thing I forgot to mention in my previous post. Yes,
    we have enabled portfast.
     
    Marc Leeman, Sep 27, 2004
    #3
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