Hello
Hope you are all right. I think I had readed most of below link.
https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/16437-ospfdbtoc.html?referring_site=bodynav
I have some question about practice. Hope can have your advice and share experience.
In a typical environment. A head office with multi branch office.
Q1. How to design ospf area for head office and each? Head office with area 1 then edge router have area 0, all other branch similar this? or other way?
Q2. How office have ospf communicate with each other? I just put IPSEC vpn(limit by knowledge, I only know this) to confirm each office can touch each other, then ospf can work?
Q3. Should I put wan link ospf as demand-circuit to keep it on?
Q4. If I use
default-information originate
in router ospf sesction on edge router. It will originate default router to let other router use me as default gateway. This work in current area, but this type 5 lsa will lean by whole AS, include other branch office. This is not what I want, cause branch office have their wan and their self edge for gateway. Summary the question. How could I let each area know their default gateway properly and separately?
Thanks for you time.
Best Regards.
Scott
