RE: OSPF loopback addresses shown as real subnet the 3 ways

From: Paul Slater (pauls@hostworks.com.au)
Date: Mon Dec 19 2005 - 20:07:53 GMT-3


Hi,

I have been playing with this when I had a chance at the weekend just
gone.
The 3 ways as I can see are

1) opsf network point-to-point

2) Redistribution of connected or out of another protocol one.

3) Area range. The area range is not so simple the only way I got it to
work is by creating a new area and doing a virtual to area 0 see below

Area 0 router

router ospf 2002
 area 10 virtual-link 172.16.3.3
 network 128.10.1.0 0.0.0.255 area 0
 network 172.16.1.0 0.0.0.255 area 0
 network 172.16.2.4 0.0.0.3 area 10

     172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
C 172.16.2.4/30 is directly connected, Serial0.2
C 172.16.1.0/24 is directly connected, Serial0.1
O IA 172.16.3.0/24 [110/65] via 172.16.2.6, 00:24:03, Serial0.2

ABR router

router ospf 2002
 log-adjacency-changes
 area 10 virtual-link 172.16.2.5
 area 12 range 172.16.3.0 255.255.255.0
 network 172.16.2.4 0.0.0.3 area 10
 network 172.16.3.0 0.0.0.255 area 12
 

Loopback100 172.16.3.3

If someone has a better way of doing it then please let me know.

Regards Paul



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