Date: Fri, 11 Feb 2011 02:10:41 GMT From: Michiel Boland <michiel@boland.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/154667: link stage change on multicast join/leave (fxp) Message-ID: <201102110210.p1B2Af8J047511@red.freebsd.org> Resent-Message-ID: <201102110220.p1B2KAxk042840@freefall.freebsd.org>
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>Number: 154667 >Category: kern >Synopsis: link stage change on multicast join/leave (fxp) >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Feb 11 02:20:09 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Michiel Boland >Release: -CURRENT >Organization: >Environment: FreeBSD charlemagne.boland.org 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Fri Feb 11 02:27:17 CET 2011 root@charlemagne.boland.org:/usr/obj/usr/src/sys/CHARLEMAGNE amd64 >Description: Joining or leaving a multicast group causes a link flap on an fxp interface, leaving the interface down for about two seconds after the join/leave. Other network interfaces (only tested with re so far) don't appear to have this problem. As a result, multicast applications stop working (mplayer cannot play UDP multicast streams for example.) This appears to broken in -CURRENT somewhere between July 2010 and today. >How-To-Repeat: $ mtest j 239.0.0.1 fxp0 l 239.0.0.1 fxp0 /var/log/messages displays Feb 11 03:08:18 charlemagne kernel: fxp0: link state changed to DOWN Feb 11 03:08:20 charlemagne kernel: fxp0: link state changed to UP Feb 11 03:08:59 charlemagne kernel: fxp0: link state changed to DOWN Feb 11 03:09:01 charlemagne kernel: fxp0: link state changed to UP corresponding to the join/leave operations >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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