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AlexM2020
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OSFP Public IP Subnet

Wed Dec 30, 2020 5:14 pm

Good evening,
currently I have a totally bridged network but for reasons of size I decided to adopt a new configuration by inserting some routers with OSPF protocol.
I would like to implement a Core Router that implements a BGP session with my ISP. Subsequently with the OSPF protocol I would like to make the routers communicate as in the following network diagram. So far everything is working, I get the problem when I would like to go and manage the assignment of my public subnet xxx.xxx.xxx.xxx/24 assigned to me by RIPE. I would like to be able to place a number greater than 2 or more Public IPs on both the Tower 1 router and the Tower 2 router. I have read that it is actually feasible with the OSPF protocol but after several tests I could not find a working configuration. I have searched for similar examples online but have not come to any effective solution.
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Thanks in advance for any help or advice
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Re: OSFP Public IP Subnet  [SOLVED]

Wed Dec 30, 2020 6:18 pm

There are two different articles that I think would help you here:

The first is an overview of migrating from bridged to routed for a WISP

https://stubarea51.net/2019/09/15/wisp- ... to-routed/

The second addresses your concern of getting IPs from a /24 out to the towers. VPLS with MPLS is one of the best ways to do this. You keep some of the benefits of efficient addressing utilization from a bridged network but the underlay is all L3.

https://stubarea51.net/2018/04/23/wisp- ... c-subnets/
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fiendshard
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Re: OSFP Public IP Subnet

Sat Jan 09, 2021 4:25 pm

Dammit' guys, it is OSPF (Open Shortest Path First) not OSFP - please use correct terminology when posting and replying, you are not some firecracker salesmen from Malawi.

Think of the bots and crawlers -- not all of them are smart enough.

Also, there is that common mistake made even by the creators of this forum (thread) - see attached pic
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