I went through this section relatively quickly but at the end I was
curious as I did something a little different than what is provided in the
DSG...
The second bullet states: .... Add the Loopback0 interface of each of the
other devices (R5/R1) to the appropriate area..
The subsequent bullets discuss connectivity between loopbacks throughout
the OSPF network need to be maintained and if connectivity is lost between
R2/R6, they must be able to reach each others Loopback0 intf's...
I added the loopbacks of R1/R5 to Area 0, via virtual-links to either
R1->R5->R2 or via R1->R6... The DSG has them listed as being installed to
Areas other than 0 which are connected via physical interfaces.. Are there
any caveats I am overlooking by placing them in Area 0 and utilizing the
redundant Virtual-Links...
R2#sho ip route ospf
70.0.0.0/8 is variably subnetted, 15 subnets, 4 masks
O 70.18.103.1/32 [110/3] via 70.18.26.6, 00:17:08, FastEthernet0/0.26
[110/3] via 70.18.25.5, 00:22:46, FastEthernet0/0.25
R1#
interface Loopback0
ip address 70.18.103.1 255.255.255.255
ip ospf 7018 area 0
!
router ospf 7018
router-id 1.1.1.1
log-adjacency-changes
area 15 virtual-link 5.5.5.5 authentication message-digest
area 15 virtual-link 5.5.5.5 message-digest-key 1 md5 cisco
area 16 virtual-link 6.6.6.6 authentication message-digest
area 16 virtual-link 6.6.6.6 message-digest-key 1 md5 cisco
Thanks,
Don
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