Hi ,

clear interface should work, find below syntax for it..

clear interface [physical_interface[.subinterface] | mapped_name | interface_name]

Usage Guidelines

If an interface is shared among contexts, and you enter this command within a context, the security appliance clears only statistics for the current context. If you enter this command in the system execution space, the security appliance clears the combined statistics.

You cannot use the interface name in the system execution space, because the nameif command is only available within a context. Similarly, if you mapped the interface ID to a mapped name using the allocate-interface command, you can only use the mapped name in a context.

HTH...rate if helpful..