Hi Guys, this is my first post here so I just want to say a huge thank you in advance for any help I'm able to get on this!!
I'm studying for my JNCIP-SP and I've knocked together a lab which should scale to allow me to cover all topics simultaneously so it's quite large, sorry in advance (Attached is the diagram from my EVE-NG setup). I'm slightly confused by the behaviour of OSPF at the moment. My provider core (represented by the cloud icons, running vMXs) is currently area 0 (had all sorts of issues trying to integrate the 'super' backbone into an existing customer LAN with area 0, so re-designed it) This re-distributes into MP-BGP with RSVP signalled LSPs for transport.
The connections between net1 and net3 are area 100 - the 'Branch' vMX has a loopback intf in area 50. What i wanted to do was create a backdoor link between net1 and branch to then set up a sham link to allow type 1 and 2 LSA's to be propagated by the ISP-D ASBR to allow normal metrics to control the use of the MPLS as the primary path.
The issue i'm having is that whilst net1, net 3 and Branch see the ISP devices as ASBR's - the ASBRs are not generating type 5 LSA's as expected for the routes learned at the branch office, despite being redistributed from BGP. They show as Summary LSA's in the LSDB. I know the OSPF domain ID can be used to convert the advertisements from type 5 to type 3 if they match - this has not been done and I've even gone to the trouble of explicitly configuring different domain ID's but no luck!
I really want to be able to mess around with the NSSA flag, domain ID, sham links etc - so any help understanding what i've done wrong would be great! I've attached config for the net 1 device, the ISP-A and the LSDB. Thanks!! =]
Thanks for the quick response! That behaviour is exactly what i'd expect. The two connections to the 'customers' main site are configured with a domain ID of 20 and the Branch site is configured to use a domain ID of 10. The vMX in the branch site has a loopback address of 22.214.171.124 - From the primary site I should see this route as an External LSA, not a summary, right?