Hi, I'm seeking advice and possibly new solution to the issue I'm about to descibe.
Attached you can find the topology.
Basically in this network we have OSPF as the IGP protocol with two areas - backbone and area 1 T-NSSA.
Area 1 configuration on R2 is as follows:
area 0.0.0.1 {
nssa {
default-lsa default-metric 1;
no-summaries;
}
interface ge-0/0/1.4 {
interface-type p2p;
}
}
The ultimate goal is to have all FECs visibility in every router (specially R5) with LDP as the label distribution protocol.
I'm aware of the constraints of LDP that it will only install a FEC into inet.3 when it has a /32 route in inet.0 for that FEC learned through an IGP. So initially at R5 I have only a default route from R2 and no specific summary routes.
If I remove the "no-summaries" from the R2 configuration for area 1 all works fine. But I would like to know any other options.
I tried configuraing additional link between R2 and R5 which at both sides would connect to Area 0, but no luck here. R5 receives summary routes for others routers loopbacks and installs them into inet.0 but doesn't install any FECs into inet.3.
R5 receives the necessary label bindings for all the routers and stores them in the database.
What could be the problem?