OSPF Hierarchical network

[sudhakara.py]

Hi 

I know OSPF operation, I have done configuration many time.

I would like to know what is hierarchical network design in OSPF, 1. why do need that ?  2.How to design that ? 3. If not have hierarchical design what happens?

Please answer.

[Reza Sharifi]

Hi,

Have a look at this doc.

http://www.cisco.com/cpress/cc/td/cpress/design/ospf/on0407.htm

HTH