Hi, I have a couple of question regarding speeding up OSPF convergence to help me understand it better.  In this particular scenario I want to speed up OSPF convergence should a fault occur between two specific locations without causing issues for other routers on the network.  These two locations are part of the backbone area. The two locations have two point to point connection between them on two different routers at either end.             R1-----------------(Serv Provider1)------------------------R3         SiteA                                                             Site B             R2-----------------(Serv Provider 2)------------------------R4  As far I can see there are two main factors controlling OSPF fast convergence. 1. Failure Detection Time. 2. Propagation of fault / SPF recalulation time. The first factor - failure detection time can be reduced by decreasing the OSPF hello/dead interval timers or by using BFD to detect the failure.  Which is the best option? From what I see if using OSPF hello/dead timers I would only need to match timer values on router interfaces either side of my point to point links and could leave other interfaces as they are. Is this correct? Regard the second part -  by throttling the SPF timers, OSPF SPF calculation time is reduced. Again considering my two Point to Point links can I adjust the timers on the routers either side of the Point to Point link or do I need to set them the same on all routers in the OSPF network. ("Timers throttle SPF" command). ... View more