How to exclude URL from DoS protection?
You can do this with two options:
1- using a LTM policy with two rules, one default that enable l7dos, and one specific to your URL that disables l7dos.
2- using an iRule with DOSL7::enable and DOSL7::disable commands.
But one thing to be checked/tested is if the disable/enable actions apply only to the current transaction or to the whole TCP connection.