I am trying to create a BGP simulation in GNS3.
I have the following topology
Here's what I have understood:
R1 will advertise 201.10.10.0
R2 will advertise 203.0.2.0
R3 will advertise 203.0.2.0
R4 will advertise 203.0.4.0, 205.0.0.0, 205.0.0.128
Since, the next hop is not changed in iBGP sessions, I will either have to use neighbor next-hop-self
command or add IGP.'
I am adding IGP. In AS 200 for R3 I will have to add 203.0.2.0 and 203.0.3.0. Similarly for R2 I will have to add 203.0.1.0 and 203.0.2.0.
If I choose to add RIP or OSPF with same process ID in AS 200 and AS 300 then doing IGP will share the routing information of AS 200 and AS 300 with each other using IGP. How do I fix this?