Re: altq for vlans?

From: Robert Watson (rwatson_at_FreeBSD.org)
Date: 02/14/05

  • Next message: Max Laier: "Re: altq for vlans?" 
    Date: Sun, 13 Feb 2005 23:05:27 +0000 (GMT)
To: David Gilbert <dgilbert@dclg.ca>

    On Sun, 13 Feb 2005, David Gilbert wrote:

    > Has anyone considered patching the vlan driver to support altq? I
    > gather that since tun works, so should vlan.

    My understanding is that ALTQ processing occurs in the context of
    persisting outgoing packet queues -- the queueing going into the vlan
    driver is minimal, as the vlan driver immediately hands packets off to the
    underlying driver output queue. As such, my guess is that (a) there would
    be little or no effect to adding ALTQ processing the vlan interfaces since
    packets only ever live fleetingly in vlan queues, and (b) ALTQ processing
    already happens on the underlying interface, so you probably don't need it
    at the vlan layer, although you might look at vlan tags in deciding how to
    drop/etc the vlan-sourced messages in the underlying interface queue.

    Robert N M Watson

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  • Next message: Max Laier: "Re: altq for vlans?"