On May 7, 2009, at 11:32 AM, Ross Vandegrift wrote:
On Thu, May 07, 2009 at 02:03:44AM +0300, Ibrahim Abo Zaid wrote:
actually i can't get if SUP running SSO why you think configuration
will be
loaded from active to standby during switchover ? !
SSO maintains control plane and data plane resiliency and both SUP
have
active IOS image and synchronized configuration
Not during switchover - during bootup. When the standby SUP is
booting, it needs to fetch the config from the active.
That is the syncronization problem I ran into yesterday.
I believe Jared meant that you would need to interrupt the boot
process of one of the sups so that it WON'T boot during power up.
Once you have one Sup fully online with all modules initialized, you
can reset the one that you interrupted and let it boot. And I agree
with him. It looks like a race condition that is happening because of
HA initialization timing during boot with both Sups.
Sure, if you happen to have physical access you can ignore that OOB
thing and just pop a sup out, boot, and pop it back in once everything
else is online. But I think most of us are used to working on
equipment that is somewhere between "fairly inconvenient" and "20 hour
flight" to physically access, so my default response is usually how to
do things over the wire or though OOB as well.
Daryl
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