>>I have send a mail to patch author, maybe can he give us more informations >>about the problem.
Reponse from Herbert Xu > I'm using cisco switches , and they seem to not like igmp queries with > 0.0.0.0 address coming from linux bridge. > > > Do you remember what exactly was the problem or users reports about it ? I > would like to known what happen exactly. The physical switch (Cisco) would stop sending multicast packets to our port completely when it receives our zero-source quieries. Cheers, -- Email: Herbert Xu <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt " So Maybe it's specific to cisco, but I think i'm not the only one to use cisco at work ;) I'll test the patch to see if it's working fine. ----- Mail original ----- De: "Alexandre DERUMIER" <aderum...@odiso.com> À: "Michael Rasmussen" <m...@datanom.net> Cc: pve-devel@pve.proxmox.com Envoyé: Lundi 11 Mars 2013 06:41:15 Objet: Re: [pve-devel] corosync, multicast problem because of vmbr multicast_snooping enabled Thank for help Michael >>1) Configure your switches to always have numerical lower IP than any >>hosts on the same vlan Not sure it'll help, as igmp query from linux have 0.0.0.0 address and not real host address. But my switches have lower ip than my proxmox hosts also, cisco doc say: http://www.cisco.com/en/US/docs/switches/datacenter/sw/nx-os/multicast/configuration/guide/b_multicast_chapter_0110.html " Note The IP address for the querier should not be a broadcast IP, multicast IP, or 0(0.0.0.0). " So maybe cisco really don't link 0.0.0.0 address quierer... I have send a mail to patch author, maybe can he give us more informations about the problem. I'll continue tests this week. ----- Mail original ----- De: "Michael Rasmussen" <m...@datanom.net> À: pve-devel@pve.proxmox.com Envoyé: Dimanche 10 Mars 2013 11:05:49 Objet: Re: [pve-devel] corosync, multicast problem because of vmbr multicast_snooping enabled On Sun, 10 Mar 2013 10:41:53 +0100 (CET) Alexandre DERUMIER <aderum...@odiso.com> wrote: > > So, I don't known for HP switchs, but for Cisco switches it seem to break the > election of igmp. > Some thoughts: 1) You have an aggregation spanning over two switches, I only use one 2) The switch is up before the pve hosts and maybe HP switches, given the are configured to be querier, disable election and forces querier state because I never see any querying on my network coming from the switch. It is only the pve hosts which sends out queries. 3) If none of your Cisco switches are configured as querier they use simple election to determine querier 4) When I had not configured my switch as querier I seem to recall a broken multicast on the vlan too. Some tests you can performe: 1) Configure your switches to always have numerical lower IP than any hosts on the same vlan 2) Designate one or both of your switches as querier If both of your tests gives a successful result I think the conclusion must be that the linux bridge in some way brakes the election since when you start your hosts one of your switches must be the querier but after some time the querier changes to one of your hosts presumably because your switches are having a numerical higher IP than one or all of your pve hosts. > > Maybe my problem was that my proxmox host was the igmp quierer, and when I > have shutted it down, no other igmp quierer have worked, and snooping have > blocked all mutlticast address. > or maybe "Multicast routers send host-query messages periodically to refresh their knowledge of memberships present on their networks. If, after some number of queries, the Cisco IOS software discovers that no local hosts are members of a multicast group, the software stops forwarding onto the local network multicast packets from remote origins for that group and sends a prune message upstream toward the source." PS. Are your mail client broken because it removes the List-Id from your replies in which case other mailers will reply only to you when replying if you forget to say 'reply to all'. -- 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 -------------------------------------------------------------- Democracy is the name we give the people whenever we need them. -- Arman de Caillavet, 1913 _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
