Routing protocols

[The_guroo_2]

i was just wondering abt designing or choesing routing protocols.....suppose we have 4 sites around the world and it beongs to one organization......so in which scenario i would be using IBP snd in which scenario i would be using IGP btw them.....suppose if i am using ospf so would all the routers would be in area o or in different area's....i recon i am confuse abt this thing which thing would decide to use IBGP or IGP??? thnaks for looking

[royalblues]

BGP is generally used when you want to route between autonomous systems. IF u run IBGP as the IGP in your network, then you need to have a full mesh with every router peering with every other router to avoid split horizon issues(though it can be relaxed by using Route reflectorsw which again would require additional configuration)

THe choice of OSPF as the routing protocol seems to be ideal. THe assignment of areas depend on your network topology.

Remember when you divide your networks with areas all other areas need to talk to the backbone (area 0)

HTH

Narayan