Re: multicast problem in vls on freebsd 4.10

From: Bruce M Simpson (bms_at_spc.org)
Date: 10/21/04

  • Next message: Jamie Jones: "Re: ipfw bw limiting question" 
    Date: Wed, 20 Oct 2004 18:24:04 -0700
To: Yong Chu Eu (Ñî×ÓÓÓ) <ceyong@yahoo.com>

    On Wed, Oct 20, 2004 at 07:53:28AM -0700, Yong Chu Eu (Ñî×ÓÓÓ) wrote:
    > i am try to stream from freeBSD multicast router(without kame but with
    > pim6sd,route6d)to MN throught Access Point which are redhat. There is a
    > bridge between eth0 and wlan0 at software Access Point. There problem is i
    > cannot even start streaming from vls, the error message i paste as below .
    > I can do streaming on IPV4/IPv6 unicast.

    There are several issues here that I see above and beyond the problems
    you are having with vls. Many pieces of 802.11 hardware simply don't
    support multicast receive in an efficient way.

    The last time I looked at the acx100 driver code, it did not support
    multicast receive, period - the necessary ioctls were not there. So if
    you wanted to receive multicast frames, you would need to put the card
    into promiscuous mode. You might consider contacting the author, Darron
    Broad, about this.

    I don't know about the behaviour of the Linux bridging code with respect
    to bridging multicast frames; the behaviour for most low-end hardware
    switch implementations is to propagate them on all other ports as if
    they were broadcasts.

    BMS
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  • Next message: Jamie Jones: "Re: ipfw bw limiting question"

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