[Linux-cluster] Re: More CS4 fencing fun

[Lon Hohberger]

On Tue, 2006-03-28 at 13:01 +0200, Matteo Catanese wrote:

> Each one have a management ethernet port.
> 
> Can i use those ports as a 2nd (and 3d) fence device ?

You can.

I have never set up a Brocade as a fence device, but I am told they
work ;)  The documentation should have better details.

Generally, use the FC switches as the second fence *level* for each
node, and you should be golden.  Fenced will only use the second fence
level if the first one fails (i.e. you pull out the power cables/network
cables/whatever, causing iLO to fail) and will equally protect your
data.  That, and, you don't need any new hardware.

Basically, for fabric fencing to correctly work, each node needs to have
all of its fiber ports zoned off at the FC switches in one fence level.

Something like:
    <method name="1">
       <... ilo />
    </method>
    <method name="2">
       <... switch 1 port 1/>
       <... switch 2 port 1/>
    </method>


>  > http://people.redhat.com/teigland.sca.pdf

Sorry, I made a typo...        slash
                                 |
                                 v
http://people.redhat.com/teigland/sca.pdf

-- Lon