Thats the whole point :) The netstat -i on node1 will return something like 
Name  Mtu   Network     Address            Ipkts Ierrs    Opkts Oerrs 
+ Coll
en0   1500  link#2      0.4.ac.3e.65.22   169651762     0 150335201   
+  0     0
en0   1500  172.22.6    node1             169651762     0 150335201   
+  0     0
en2   1500  link#3      0.4.ac.3e.15.54    1387003     0  1389752     
+0     0
en2   1500  172.22.7    node1hb           1387003     0  1389752     0
+     0
en1   9000  link#4      0.4.ac.7c.95.ec   232558546     0 76198992    
+ 0     0
en1   9000  172.22.5    node1r          232558546     0 76198992     0
+     0
<loop back interfaces snipped>

[download]
and a netstat -i on node2 will return something like 

Name  Mtu   Network     Address            Ipkts Ierrs    Opkts Oerrs 
+ Coll
en0   1500  link#2      0.4.ac.3e.65.4a   36127938     0 37211569     
+0     0
en0   1500  172.22.6    node2             36127938     0 37211569     
+0     0
en2   1500  link#3      0.4.ac.3e.65.c6    1412752     0  1364210     
+0     0
en2   1500  172.22.7    node2hb           1412752     0  1364210     0
+     0
en1   9000  link#4      0.4.ac.7c.97.2f   76199094     0 232558588    
+11     0
en1   9000  172.22.5    node2r          76199094     0 232558588    11
+     0
<loop back interfaces snipped>

[download]
Where node? is the primary interface, node?hb is the heartbeat link and node?r is the redundant link that node2 will use to pretend to be node1 in the event of node1 failing, in which case interface en1 will no longer have a name of node2r but node1. Sooo, if node1 is up the test will fail on node2 (which is what we want) but if node1 is dead the test will succeed which, again, is what we want. I hope that makes more sense now.

In reply to Re: Re: HA node check by coec
in thread HA node check by coec

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