From: Toh Soon, Lim (tohsoon28@gmail.com)
Date: Sat Sep 29 2007 - 23:48:34 ART
Hi Group,
Hoping someone can explain the following observation:
---Area0---(Fa0/0) R1 (Fa0/1)---Area1(stub)---(Fa0/0) BB2
R1
-- router ospf 1 area 1 stub network 150.50.1.1 0.0.0.0 area 1 ! interface FastEthernet0/1 description *** To BB2 Fa0/0 *** ip address 150.50.1.1 255.255.255.0 ip ospf priority 255 ip ospf database-filter all out !BB2 --- router ospf 1 area 1 stub network 150.50.1.100 0.0.0.0 area 1 !
BB2#sh ip os n
Neighbor ID Pri State Dead Time Address Interface 1.1.1.1 255 FULL/DR 00:00:39 150.50.1.1 FastEthernet0/0 BB2#sh ip os d
OSPF Router with ID (150.50.1.100) (Process ID 1)
Router Link States (Area 1)
Link ID ADV Router Age Seq# Checksum Link count 150.50.1.100 150.50.1.100 1170 0x80000002 0x00F2EB 1 BB2#sh ip ro os
As expected, R1 and BB2 can form adjacency but no routes are sent out to BB2. BB2 has no other LSAs except Type 1 and it sees only itself.
However the LSDB of R1 is not identical to BB2's. For one thing, it still has Type 3 LSAs (summary net) for Area 1. Eventho the config is functionally correct, I'm just curious, doesn't this violate OSPF rule of having all routers in the same area share identical LSDB?
Thank you.
B.Rgds, Lim TS
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