[ClusterLabs] EL6, cman, rrp, unicast and iptables

[Noel Kuntze]

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Hello,

Personally, I would set filters in tc (packet priorization/shaper part of the network stack)
to prioritize Cluster packets. That way, delivery of the packets is basicly guaranteed. I'd do something similiar
on the switch to make sure it prioritizes the packets, too.

The migration traffic must always have a lower priority than the traffic if cman and the other components,
so the totems get delivered in any case.
The default queuing behaviour is FIFO. This is obviously not desireable here.
If the preset queuing mechanism supports traffic priorization, you can possible get away with
a single set of iptables DSCP/TOS rules in *mangle OUTPUT to set the correct value
so the queue prioritizes it.
- -- 

Mit freundlichen Grüßen/Kind Regards,
Noel Kuntze

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