The value of the object tmnxIsisOverloadTimeout specifies the amount of time, in seconds, the router operates in the overload state before attempting to reestablish normal operations. While in overload state, this IS-IS router will only be used if the destination is only reachable via this router; it is not used for other transit traffic. Operationally placing the router into the overload state is often used as a precursor to shutting down the IS-IS protocol operation. This variable is an extension to the isisSysWaitTime to accept an additional value of 0 to specify that the router is in overload infinitely.