interarea? intra-area? O IA? O?

rakem

in OSPF if you do a show ip route command and a route is shown which has O IA in front of it does that mean that the route was learned from an OSPF neighbour within the same area or from outside the area?


Does this make it an intra area or an inter area? the definition on the actual router says that it is and Inter Area route, so then whats the difference between intra and inter?

Router#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O- OSPF, IA - OSPF inter area



so if O IA means that the route was learned from a neighbour within the area what does a O by itself mean?

cheers

larkspur

so if O IA means that the route was learned from a neighbour within the area what does a O by itself mean?

Correct me if I am wrong...

O by itslef meas the route was learned via OSPF.

O IA - menas the route was learned\crossed from another inter area (made correction to typo)


good reference:

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800943c5.shtml

hth

georgemc

rakem wrote:

in OSPF if you do a show ip route command and a route is shown which has O IA in front of it does that mean that the route was learned from an OSPF neighbour within the same area or from outside the area?

Does this make it an intra area or an inter area? the definition on the actual router says that it is and Inter Area route, so then whats the difference between intra and inter?

INTER = between different areas

INTRA = within the same area

rakem wrote:

Router#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O- OSPF, IA - OSPF inter area

so if O IA means that the route was learned from a neighbour within the area what does a O by itself mean?

cheers

O = Intra-Area route
O IA = Inter-Area route


George

Paul Boz

Think of it using common terms. What is the name for the national highways that run across the USA?

INTERstate = between states.

INTRAstate = within the state.

The same applies to OSPF.

INTERarea = routes learned from other areas.

INTRAarea = routes learned within the area.

I hope that helps a little.