[Linux-cluster] why does ip.sh launch rdisc ?

[Martin Waite]

Hi,
 
I have noticed that rdisc - apparently a router discovery protocol daemon - has started running on nodes that take possession of a VIP using ip.sh.
 
I am not familiar with rdisc.   It is currently installed on all my RHEL hosts, but is not running.
 
Do I need to run rdisc ? 
 
Also, the man page says that rdisc uses 224.0.0.1 as a multicast address.  So does my current cman configuration.  Should I configure cman to avoid this address ?
 
regards,
Martin