Hello,

I work at a WISP and I am routing the network that is currently in bridge mode.

I have available a /22 network and I managed to aggregate each POP with appropiate network size using best pratices. Each POP have the required network size, like /25, /26, etc depending on quantity of costumers and expected growth rate. Please see the picture below:
All routers and costumers have public addresses (I kept wireless equipment using private addresses).

My question is: When configuring each router's OSPF, should I configure the "Networks" using each POP's network's (/25, /26, etc) or I can use the entire aggregated network (/22) on all routers?

Thanks!

Using the exact mask length will work and using an aggregate will work. However, it's considered a best practice to only allow the specific mask you need advertised to keep from trying to form neighbors on a misconfigured interface, or advertising a subnet inadvertently.

Using the exact mask length will work and using an aggregate will work. However, it's considered a best practice to only allow the specific mask you need advertised to keep from trying to form neighbors on a misconfigured interface, or advertising a subnet inadvertently.

Thanks! So I will configure the exact Networks that are actually being used on each Router. Thanks for the fast reply!

Hi,

I was thinking about a problem I could have migrating from bridge to OSPF... please take a look at the topology example I posted in my original post.

All those POPs have Mikrotik Routerboards, where I will apply OSPF. But they currently have all ports attached to a bridge (because currently my network runs on bridge).

If I start to configure OSPF before removing the interfaces from the bridge, all routerboards will be neighbors with each other... right? Do I have to configure the firewall on each routerboard to not forward OSPF discovery packets? Or this will not be an issue?

Thanks!

What did you end up finding out on this when you switched it to a routed network?