The maximum number of outstanding TAL authorization
requests allowed on SSG. If the number of authorization
requests goes beyond this value, SSG does a SYS log
message and any packets received that would result in
SSG sending a new radius request will be dropped at the
CEF path itself.
When this value is set, it will be applicable from that
point onwards. If the number of existing requests exceeds
the new values, these requests will not be discarded.