My question is regarding OSPF and virtual links. As you can see, I have
created an area 23 between R2 and R3 such that R3 will need a virtual link
defined in order to have a connection to Area 0. My question is, does R3
have to peer with an interface in R2 that is a member of area 0? I have
noticed that if I put R2's loopback interface (which R3 is peering to) in
area 23, it fails, whereas, if I move the interface to area 0, the virtual
link comes up. Please take a look at the crude diagram below, or the
attached visio for clarification. Please let me know your thoughts on this.
Thanks again for all of your informed help (and I apologize if this appears
to be a less-than-CCIE-caliber question).
Topology map (excuse the crude map, if you have visio, check out the
enclosed diagram:
R5---R1
/ \
/ \
R4 R2--R3
Router2:
router ospf 10
area 23 virtual-link 130.10.23.3
network 130.10.2.2 0.0.0.0 area 0 (Loopback Interface)
network 130.10.23.2 0.0.0.0 area 23 (Link to R3 Serial Interface (S1))
network 130.10.245.2 0.0.0.0 area 0 (Link to R5 Frame-Relay Interface (S0)
[DR=R5])
Router3:
router ospf 10
area 23 virtual-link 130.10.2.2 (Virtual link peering to Loopback on R2 (in
area 0, does it have to be?)
network 130.10.23.3 0.0.0.0 area 23 (link to R3 Serial Interface (S0))
Router4:
router ospf 10
network 130.10.4.4 0.0.0.0 area 4 (Loopback Interface)
network 130.10.245.4 0.0.0.0 area 0 (Link to R5 Frame-Relay Interface (S0)
[DR=R5])
Router5:
router ospf 10
network 130.10.5.5 0.0.0.0 area 5
network 130.10.245.5 0.0.0.0 area 0
neighbor 130.10.245.2
neighbor 130.10.245.4
BTW, anyone else taking the exam on April 30th? I am...heheh...
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