Am Mittwoch, 3. Juni 2009 13:43:03 schrieb Dejan Muhamedagic: > On Wed, Jun 03, 2009 at 01:06:02PM +0200, Michael Schwartzkopff wrote: > > Am Mittwoch, 3. Juni 2009 12:52:14 schrieb [email protected]: > > > Hello all. > > > > > > > > > > > > Is there now any use to having the 2nd interface connected with HA? > > > > Redundancy in the heartbeat path. > > > > > When previously configuring servers with HB 2.1.3, LVS and ldirectord I > > > had the resources listeing on eth1 and had heartbeat communicate over > > > eth0 on both servers to try and cut down on noise. > > > > If you do not want to have the broadcast traffic on your net, use the > > ucast statement in ha.cf > > > > > Is there any reason to do this and if so in what way would you set it > > > up using single HA resources in a 2-node HA cluster? > > > > Use: Redundancy of heartbeat path. > > > > Setup: > > on node1: > > bcast eth0 > > ucast eth1 <ip address of node2 on eth0> > > > > on node2: > > bcast eth0 > > ucast eth1 <ip address of node1 on eth0> > > Adding > > > ucast eth1 <ip address of node1 on eth0> > > ucast eth1 <ip address of node2 on eth0> > > in both ha.cf works as well. That way ha.cf remains equal on all > nodes. > > > But anyway, using the resources net for heartbeat communication is not > > the best idea. > > Why not? Because of noise? There's not much traffic with > heartbeat. Of course, in this case it is preferable to use > unicast.
- Using tcpdump on an other node in that net I have to add "not port 694". - If the other traffic blocks the net, you get delayed heartbeats. - Having multiple clusters on the same net you have to use other ports than 694 with broadcasts. -- Dr. Michael Schwartzkopff MultiNET Services GmbH Addresse: Bretonischer Ring 7; 85630 Grasbrunn; Germany Tel: +49 - 89 - 45 69 11 0 Fax: +49 - 89 - 45 69 11 21 mob: +49 - 174 - 343 28 75 mail: [email protected] web: www.multinet.de Sitz der Gesellschaft: 85630 Grasbrunn Registergericht: Amtsgericht München HRB 114375 Geschäftsführer: Günter Jurgeneit, Hubert Martens --- PGP Fingerprint: F919 3919 FF12 ED5A 2801 DEA6 AA77 57A4 EDD8 979B Skype: misch42 _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
