wfRipv6IntfHolddownTimer 1.3.6.1.4.1.18.3.5.3.16.1.2.1.1.12

This parameter allows the user to configure the time period which unreachable routes will be held in the Routing Pool. This time is typically 3 x the broadcast timer. It allows RIPv6 to advertise the unreachable routes to help convergence time.