Date: Fri, 15 Jun 2007 17:31:49 -0400 From: John Merryweather Cooper <john_m_cooper@yahoo.com> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: current@freebsd.org Subject: Re: multicast not happy ? Message-ID: <46730545.8050005@yahoo.com> In-Reply-To: <1277.1181941780@critter.freebsd.dk> References: <1277.1181941780@critter.freebsd.dk>
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Poul-Henning Kamp wrote: > I set up a really simple network here, two boxes with two > cross-over ethernets: > > 10.1.0.1/24 ------------- 10.1.0.2/24 > A B > 10.2.0.1/24 ------------- 10.2.0.2/24 > > Ipforwarding is enabled on both, and "routed" is running with > /etc/gateways containing: > > ripv2 > no_solicit > no_rdisc_adv > > And nothing happens at all... > > routed in both ends complain about: > > routed: Send mcast sendto(sis2, 224.0.0.9.520): Network is unreachable > routed: Send mcast sendto(sis1, 224.0.0.9.520): Network is unreachable > > Running a tcpdump on one end, the IGMP reports to the new MCast are > sent: > > syv# tcpdump -i vr1 -n -s 2000 -v > tcpdump: listening on vr1, link-type EN10MB (Ethernet), > capture size 2000 bytes > 20:35:24.738693 IP (tos 0x0, ttl 1, id 11501, offset 0, > flags [none], proto: IGMP (2), length: 32, options ( RA > (148) len 4 )) 10.1.0.1 > 224.0.0.9: > igmp v2 report 224.0.0.9 > > 20:35:25.118284 IP (tos 0x0, ttl 1, id 118, offset 0, > flags [none], proto: IGMP (2), length: 32, options ( RA > (148) len 4 )) 10.1.0.2 > 224.0.0.9: igmp v2 report 224.0.0.9 > > But no further trafic is sent. > > Netstat -ian shows the mcast groups joined: > > vr1 1500 <Link#2> 00:00:24:08:62:ed 25 0 8 0 0 > 01:00:5e:00:00:09 23 7 > 01:00:5e:00:00:01 23 7 > vr1 1500 10.1.0.0/24 10.1.0.1 17 - 7 - - > 224.0.0.9 > 224.0.0.1 > vr2 1500 <Link#3> 00:00:24:08:62:ee 28 0 9 0 0 > 01:00:5e:00:00:09 26 7 > 01:00:5e:00:00:01 26 7 > vr2 1500 10.2.0.0/24 10.2.0.1 17 - 7 - - > 224.0.0.9 > 224.0.0.1 > > as does ifmcstat: > vr1: > inet 10.1.0.1 > group 224.0.0.9 > igmpv2 > mcast-macaddr 01:00:5e:00:00:09 refcnt 1 > group 224.0.0.1 > mcast-macaddr 01:00:5e:00:00:01 refcnt 1 > vr2: > inet 10.2.0.1 > group 224.0.0.9 > igmpv2 > mcast-macaddr 01:00:5e:00:00:09 refcnt 1 > group 224.0.0.1 > mcast-macaddr 01:00:5e:00:00:01 refcnt 1 > > Any ideas ? > # /sbin/route add -static -net 224.0.0.0 -netmask 240.0.0.0 -iface sis[1|2] I had to do this so my OpenSlp would work. jmc
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