OSPF question

[Balloonhead]

I am curious what the best way would be to redistribute routes using ospf. The company I currently work for has 10 sites connnected via ipsec vpn tunnels. A vpn tunnel from each site to each site. I would like to redistribute the routes from all sites to all sites for redundancy aka routing issues with the isp so that the traffic will continue to flow from another direction. I am new to ospf meaning I have a basic understanding of how it works and how to set it up but I would like some input on the best way to redistribute the routes.

Thanks in advance

[Joseph W. Doherty]

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Posting

For just 10 sites, assuming there's not a huge number of routers, just having all your routers in the same OSPF area might be sufficient.

[Balloonhead]

So a simple setup with a long bomb network statement on each router? 10 routers total, about 20 + subnets split up across the sites.

router ospf 1

network 0.0.0.0 255.255.255.255 area 0

[Reza Sharifi]

As Joe noted one OSPF area (area 0) should be sufficient.

In each location, you can simply add the subnets for that location to OSPF.  For example, if you have 2 subnets for location 1 and 2 subnets for location 2, you can try this

location 1

192.168.1.0/24

192.168.2.0/24

router ospf 1

netwoork 192.168.1.0 0.0.0.255 area 0

netwoork 192.168.2.0 0.0.0.255 area 0

location 2

192.168.3.0/24

192.168.4.0/24

router ospf 1

netwoork 192.168.3.0 0.0.0.255 area 0

netwoork 192.168.4.0 0.0.0.255 area 0

and so on...

HTH

[Balloonhead]

Thank you gentlemen. I wanted to be sure before I pulled the trigger.

[Joseph W. Doherty]

Yep.