07-27-2012 11:46 AM
We have 2 nodes SA 4500 in a cluster active/active
we have a load balancer that sends all requests to node A. If node A is down, requests go to node B
we want to upgrage from 7.1 R4 to 7.1 R10
if we install the service package, i think the upgrage will be done on one node and after the other node automatically.
But, what happens to the users connected to node A?
the connection will be closed and they will make a new connection on node B?
or, they will be automatically moved to node B transparently?
07-27-2012 03:23 PM
You want to route all traffic to one node ahead of time before upgrading the device. Any remaining sessions prior to the upgrade will be disconnected and will require them to log back into to the other node.
07-29-2012 05:06 PM
07-30-2012 01:35 PM
So the impact to your end users depnds on how the load balancer is configured.
User information should be synced between the two active/active sa 4500 boxes.
So your users will only experience downtime for the time it takes for the load balancer to detect that a node is down and start forwarding traffic to the up node.
In my experience most users will not notice.