On Sat, 9 Mar 2013 17:31:54 +0100 Michael Rasmussen <m...@datanom.net> wrote:
> tcpdump -i vmbr20 -vv net 224.0.0.0/4 > tcpdump: listening on vmbr20, link-type EN10MB (Ethernet), capture size > 65535 bytes 17:20:45.093219 IP (tos 0xc0, ttl 1, id 0, offset 0, flags > [DF], proto IGMP (2), length 32, options (RA)) 0.0.0.0 > > all-systems.mcast.net: igmp query v2 > After making some investigation the above request can be interpreted this way: ttl 1: Restricted to the local subnet, no router hops 0.0.0.0 (group address): for Host Membership Query The query router election seems to be disregarded since another host in my cluster having a numerical higher higher IP than another host also sends host membership queries: tcpdump -i vmbr20 -vv net 224.0.0.0/4 tcpdump: listening on vmbr20, link-type EN10MB (Ethernet), capture size 65535 bytes 18:25:20.093126 IP (tos 0xc0, ttl 1, id 0, offset 0, flags [DF], proto IGMP (2), length 32, options (RA)) 0.0.0.0 > all-systems.mcast.net: igmp query v2 Maybe this is caused by my setup where the switch drops all multicast traffic except on the cluster administrative network in which case the hosts cannot see each other. @alexandre: Do you have multicast traffic enabled on all vlans on your switch or is this reserved only on the cluster administrative network? -- Hilsen/Regards Michael Rasmussen Get my public GnuPG keys: michael <at> rasmussen <dot> cc http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xD3C9A00E mir <at> datanom <dot> net http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE501F51C mir <at> miras <dot> org http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xE3E80917 -------------------------------------------------------------- You will gain money by an immoral action.
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