This document answers a frequently asked question about the Cisco Adaptive Security Appliance (ASA).
Why do I receive the Memory pool size is not valid Allowed range from 2 to 512 error message when I issue the url-block url-mempool 10240 command?
When you run the url-block url-mempool 10240 command, you might receive the error shown in this sample code:
ciscoasa(config)# url-block url-mempool 10240 Memory pool size is not valid Allowed range from 2 to 512
The maximum URL buffer memory pool (url-mempool) size is set to 10240 KB in single mode ASA. However, in multiple mode, each context can only have a maximum of 512 KB allocated to the url-mempool. This maximum value is hardcoded and cannot be changed.
Note: The maximum allowed URL size (configured with the url-block url-size command) must be less than the url-mempool size. As a result, before you increase the value of url-size, increase the value of url-mempool depending on the mode in which the ASA is running.