[Linux-cluster] Use alternate network interfaces for heartbeat in RHCS

brem belguebli brem.belguebli at gmail.com
Fri Aug 28 14:24:28 UTC 2009

Hi Chrissie,

Are you pointing me to the paragraph "what's the right way to ....eth0 ?"

I've tried this at first adding adding a suffix to the interfaces but
nothing happened. Suffix -p may be hardcoded (I've used -hb)

Here's an outputof my /etc/hosts (identical on both nodes):   node1 node1.mydomain   node2 node2.mydomain   node1-hb   node2-hb

Still using bond0 ....


2009/8/28, Christine Caulfield <ccaulfie at redhat.com>:
> On 28/08/09 15:10, brem belguebli wrote:
>> Hi,
>> I'm trying to send cluster communications thru dedicated LAN interfaces
>> (out of band network) separate from the production interfaces but it
>> doesn't seem to be functional.
>> I have a 2 nodes cluster (RHEL 5.3) with 2 bonding interfaces each, one
>> bonding for production on a given Vlan and the other on a dedicated and
>> isolated LAN (out of band LAN).
>> According to some cman doc (that may be outdated), the way to do so is
>> to declare explicitely at each clusternode level  the multicast addr of
>> the cluster and the interface on which the coms are sent.
>> <clusternode name="node1.mydomain" nodeid="1" votes="1">
>> <multicast addr="" interface="bond1"/>
>> </clusternode>
>> <clusternode name="node2.mydomain" nodeid="2" votes="1">
>> <multicast addr="" interface="bond1"/>
>> </clusternode>
>> and the cman multicast addr:
>> <cman expected_votes="3" two_node="0">
>> <multicast addr=""/>
>> </cman>
>> (I have a qdiskd).
>> After restarting the cluster, traffic is still sent through bond0 which
>> is the production interface.(tcpdump -i bond0 host
> I don't know where that document is but it's rather out of date, as you
> suspected ;-)
> The wiki has a up-to-date item on how to assigned different ethernet
> interfaces for cman:
> http://sources.redhat.com/cluster/wiki/FAQ/CMAN#cman_heartbeat_nic
> Chrissie
> --
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