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[Cluster-devel] cluster/cman/man cman.5

CVSROOT:	/cvs/cluster
Module name:	cluster
Changes by:	pcaulfield sourceware org	2007-08-22 15:13:58

Modified files:
	cman/man       : cman.5 

Log message:
	Add some information about setting up multi-home (redundant ring)


--- cluster/cman/man/cman.5	2007/08/22 15:13:11	1.8
+++ cluster/cman/man/cman.5	2007/08/22 15:13:58	1.9
@@ -86,6 +86,27 @@
   <clusternode name="nd1" nodeid="1">
+.in -7
+\fIMulti-home configuration\fR
+.in +7
+It is quite common to use multiple ethernet adaptors for cluster nodes, so
+they will tolerate the failure of one link. A common way to do this is to use
+ethernet bonding. Alternatively you can get openais to run in redundant ring
+mode by specifying an 'altname' for the node. This is an alternative name by
+which the node is known, that resolves to another IP address used on the 
+other ethernet adaptor(s). You can optionally specify a different port and/or 
+multicast address for each altname in use. Up to 9 altnames (10 interfaces 
+in total) can be used.
+Note that if you are using the DLM with cman/openais then you MUST tell it 
+to use SCTP as it's communications protocol as TCP does not support multihoming.
+  <clusternode name="nd1" nodeid="1"> 
+     <altname name="nd1a" port="6809" mcast=""/>
+  </clusternode>
+  <dlm protocol="sctp"/>
 .in -7

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