From: Prasad Shemrudkar (pshemrud) (pshemrud@cisco.com)
Date: Sat Aug 04 2007 - 09:38:07 ART
Hi,
I have a situation wherein there are 2 routers say R1 and BB1 connected
to a switch. The subnet is 204.12.1.0/24. R1 needs to conditionally
advertise a default route in ospf domain if it is CONNECTED to BB1. Now
I have used the following configuration on R1 but do not think its
correct (for the reason explained below the configuration).
router ospf 1
router-id 150.1.3.3
log-adjacency-changes
area 0 authentication message-digest
area 23 virtual-link 150.1.2.2
area 34 authentication
area 34 virtual-link 150.1.4.4
redistribute connected subnets route-map CONNECTED
redistribute rip subnets route-map RIP-->OSPF
network 191.1.13.3 0.0.0.0 area 13
network 191.1.23.3 0.0.0.0 area 23
network 191.1.34.3 0.0.0.0 area 34
default-information originate route-map DEFAULT
!
route-map DEFAULT permit 10
match ip address prefix-list BB1
!
ip prefix-list BB1 seq 10 permit 204.12.1.0/24
My point is, that since both router connect on Ethernet (via switch),
even if BB1 looses connectivity to the switch, the directly connected
route "C 204.12.1.0/24 is directly connected, Ethernet1/0" will still
be shown in R1's routing table (as that one is still connected) and
hence R1 will continue advertising the default route in OSPF even though
there is no connectivity between R1 and BB1.
I dunno but got a feeling, have a wrong logic as the solution has
configured it the same way too!!
Thanks in Advance,
Prasad
This archive was generated by hypermail 2.1.4 : Sat Sep 01 2007 - 11:32:09 ART