[Linux-cluster] >1500 MTU on EL5 causes things to go sideways

[Alan Brown]

Digimer wrote:
> 
>   As soon as I define MTU=2000 (for example), then cman on one note will
> start but not stop (the other node stops fine). Also, 'ccs_tool update
> /etc/cluster/cluster.conf' fails with:

Have you configured the interfaces themselves to use jumbo frames?

Does the switch support jumbo frames?

Is path mtu discovery enabled? (should only matter if there's a router 
in the way)