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

[Digimer]

On 04/12/2011 11:33 AM, Alan Brown wrote:
> 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)

The nodes are connected via a common switch, which supports large jumbo
frames (10k) and jumbo frames are enabled.

Each node's NIC is set to the same MTU=x number. No routers involved,
and the NICs themselves also support 9kb JFs.

-- 
Digimer
E-Mail: digimer at alteeve.com
AN!Whitepapers: http://alteeve.com
Node Assassin:  http://nodeassassin.org