I would like to know when I am peering with ISP. I still need to NAT on my WAN interface?


In this scenario, NAT is not required.

But you will need to advertise the OSPF routes in BGP either using the “network” command or by the method of redistribution.

hope this helps.

Normally BGP has Millions of Internet Routes. We cant distribute the whole BGP in OSPF.
If we talk about real industry concepts. So NAT is required if lan users want to access Internet.

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