large size ospf design over MPLS WAN

[veenarani2312]

Hi Guys

if I have a wan with say 100 routers on an MPLS network using gre tunnels and using OSPF, how would you recommend the design, would you just put the whole lot in area 0? 

what if there were more routers?

if not what other options would there be?

cheers

[balaji.bandi]

This is again depends on requirement ? why they need to be all in Area 0 ? can they split in to different areas due to some limitations and also in terms of LSA flooding and hard to maintain, troubleshooting 

This what cisco suggested :

https://www.ciscopress.com/articles/article.asp?p=1763921&seqNum=6#:~:text=Current%20ISP%20experience%20and%20Cisco,is%20the%20most%20optimal%20design.

[MHM Cisco World]

As my knowledge all within area 0 which is called super backbone, this make all CE (PE-CE ospf ) connect to Super backbone Area 0.