LB:reselect + persistence

See here for some guidance on your iRule requirement and using the 'Action on Service Down' Pool level feature (which I'd prefer myself): http://support.f5.com/kb/en-us/solutions/public/10000/600/sol10640.html.

Persistence (or rather state) is lost, as a new Pool Member is chosen but will be recreated once the new Pool Member is selected. Assuming you're persisting because of authentication, expect some users to have to reauthenticate. How many will depend on your Pool size.

thank you very much for your answer,

well,

you have an idea on how I can redirect clients were connecting to the server unavailable and redirect to another server with the lb: reselect?

how can I retrieve all the Ips customers who were connecting to that server and redirect them to a new server available?

thanks

If you use an iRule or the Action on Service Down feature, it'll all be automatic. There is an example iRule in the link I posted before. No need for collecting IPs or anything manual.