quote of the day, doyle...

you gotta just absorb this stuff...

Router entries are routes to ABRs and ASBRs. If a router needs to send a packet to an inter-area destination, it must know how to find an ABR; if a packet must go to an external destination, the router must know how to find an ASBR. Router entries contain this information, and are kept in a separate, internal route table.

The difference is that all destinations are the Router IDs of ABRs and ASBRs. Each entry is tagged as intra-area (i) or inter-area (I), and the entry indicates whether the destination is an ABR, an ASBR, or both. The area is recorded, as is the iteration of the SPF algorithm that installed the entry.

R3#sh ip ospf border

OSPF Process 1 internal Routing Table

Codes: i - Intra-area route, I - Inter-area route

i 10.1.212.1 [1] via 10.1.2.13, FastEthernet0/0, ABR, Area 0, SPF 51
i 10.1.201.1 [3] via 10.1.2.13, FastEthernet0/0, ABR/ASBR, Area 0, SPF 51
i 10.1.211.1 [2] via 10.1.2.13, FastEthernet0/0, ABR, Area 0, SPF 51

of course i read it before... did it sink in... of course not... sink or swim, baby...