Hi, all.
In regard to
http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Managing_the_Infiniband_Network#Modify_the_.2Fetc.2Fhosts
I would suggest a slightly different scheme:

In table hosts add a rule to the other interfaces:
tabdump hosts
#node,ip,hostnames,otherinterfaces,comments,disable
"compute","|\D+(\d+)|192.168.0.(9+($1))|",,"|\D+(\d+)|xcat($1)-ipmi:192.168.10.(9+($1)),xcat($1)-ib0:192.168.1.(9+($1))|",,

This way /etc/hosts can be maintained with makehosts for large-scale networks, with ease.
(in this example I combined IB and IPMI just to show how it can be done, all other IB,ml interfaces can be added the same way - still much easier in my opinion than adding each and every node to /etc/hosts by hand)
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