Date: Mon, 14 Mar 2005 15:47:53 +0100 (CET) From: Alain Thivillon <alain.thivillon@hsc.fr> To: FreeBSD-gnats-submit@FreeBSD.org Cc: alain.thivillon@hsc.fr Subject: kern/78821: ALLMULTI on Vlan Interfaces Message-ID: <20050314144753.A39B461C1D@fw.hsc.fr> Resent-Message-ID: <200503141520.j2EFK85T027979@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 78821
>Category: kern
>Synopsis: ALLMULTI on Vlan Interfaces
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Mar 14 15:20:08 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Alain Thivillon
>Release: FreeBSD 5.3-RELEASE-p5 i386
>Organization:
HSC
>Environment:
System: FreeBSD fw.hsc.fr 5.3-RELEASE-p5 FreeBSD 5.3-RELEASE-p5 #5: Fri Mar 11 17:26:07 CET 2005 root@fw.hsc.fr:/usr/obj/usr/src/sys/FW i386
Networks interfaces: em Intel Card with 4 vlans.
>Description:
When using mrouted on a system with Vlan interfaces, FreeBSD
fails to set ALLMULTI flag on vlan parent interface.
As result, IGMP query responses are not received by mrouted
unless router is actually client of multicast group, and
mrouted fails to forward multicast packets on these interfaces,
even if there is group members.
>How-To-Repeat:
Configure ip forwading between 2 vlans interfaces on a MROUTING
kernel, launch mrouted and watch mrouted forwarding table
when a client send IGMP Host Membership Report. The table
is not updated until router himself is group member (and thus
multicast group address is programmed on parent interface).
>Fix:
As this is done for standard multicast code, setting ALLMULTI
flag on vlan interface should set ALLMULTI on parent interface.
Alternatively, a "allmulti/-allmulti" option to ifconfig should be sufficient
to let mrouted works on vlan interfaces.
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050314144753.A39B461C1D>