misc/159006: net/quagga - multicast broken in ripd

Eugene M. Zheganin eugene at zhegan.in
Mon Jul 18 04:20:09 UTC 2011

>Number:         159006
>Category:       misc
>Synopsis:       net/quagga - multicast broken in ripd
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 18 04:20:07 UTC 2011
>Originator:     Eugene M. Zheganin
>Release:        8.2-RELEASE
RealService LLC
FreeBSD wizard.hq.norma.perm.ru 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Fri Mar 25 13:08:09 YEKT 2011     emz at ns.hq.norma.perm.ru:/usr/obj/usr/src/sys/WIZARD  i386
Multicast not working in ripd.

I recieve tonns of messages like:

Jul  1 15:35:24 wizard ripd[68677]: Can't setsockopt IP_MULTICAST_IF on fd 11
to source address for interface gre14

gre14 (like any other gre interface) may look like:

# ifconfig gre14
gre14: flags=b051<UP,POINTOPOINT,RUNNING,LINK0,LINK1,MULTICAST> metric 0 mtu
        tunnel inet -->
        inet --> netmask 0xffffffff

Packets sent to cannot traverse gre interface, and they go using
default route.
However, multicast works just fine on gre interfaces in ospfd.

I use unicast and direct neighbor defining as a temporary solution.

Unfortunately, I'm stuck with the RIP as it's the only routing protocol on the Cisco routers series 85[, 86x and I have lots of these.

I have filled a bug in quagga's bugzilla, but noone reacted so far.
Install FreeBSD net/quagga port, get one of the low-end Cisco routers, confugure RIP, see the logs.
None known.


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