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Re: [Linux-cluster] Fencing agent for cisco nexus 5k

On 10/04/2011 09:45 AM, Mark Hlawatschek wrote:
> Hi,
> we are currently building up a Cisco Nexus FCoE infrastructure together with Red Hat Clusters. 
> I'd like to use the Nexus 5ks for I/O fencing operations and I'm looking for a fencing agent to be used together with the Nexus 5k.
> The basic idea would be to disable the network ports of the cluster node inside the Nexus that is supposed to be fenced.
> Any pointers or ideas? 
> Thanks a lot!
> Mark

I don't have experience with that switch/equipment. However, writing a
fabric-type fence agent should be pretty straight forward. I assume the
device has telnet or ssh access?

Install the fence-agents package and then look for the 'fence_*' files.
They will make for great examples to base a new agent on. The actual API
is defined here;


The main task is to ensure disconnection of the node. So after calling
the switch, be sure to confirm that the port is logically disconnected
before returning a success to the fenced caller.

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