This isnt really specific to windows, but it seemed like the most appropriate forum This might sound like an odd one... Does anyone know how long it takes for BGP to reanounce routes to enough neighbour routers to get decent Internet connectivity restored? For example: Moving away from a single ISP to multihomed using BGP (not including original ISP). The IPs are all on private PI space. Completely new router with the same IP as the old one - so the old one needs to be turned off before the new one can be turned on (atleast on the same IP as the old one). Therefore, the neighbour routers of the old ISP will still be advertising that they can route the IP block... when they cant What I'm basically asking is, does it take seconds, minutes or hours for BGP route information to be anounced? Anyone got any ideas?