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Hello Everyone, I'm trying to understand local preference attribute of BGP. I understand that weight is locally applied to the router and not advertised to any other router whereas local preference is advertised to other routers in the same AS. From ...
Hi all,
I'm trying to learn route redistribution. Below I have attached the topology where the network consists of EIGRP and OSPF. I understand that route redistribution is used where we are running multiple routing protocols and we need to transla...
Hi Everyone,
I have a few questions regarding BGP below:
Q1) Why do we have IBGP?
From what I understand is that inside a big ISP cloud, there could be many routers that will be under one AS and learning information from IGP protocols and hence...
Hi Everyone,
I'm trying to understand OSPF Network types. One of the type I'm having confusion is Point-to-Multipoint. If I'm correct, this network type emulates a point-to-point connection where no DR/BDR is required and no need to define manual n...
Hi all, I'm trying to configure ospf over dmvpn. The data doesn't pass through the tunnel. I have attached the topology.
I have configured OSPF on R1, R2 and R3 and R2 is the hub while R3 and R1 are the spokes.
R2 Hub config:
R2#show run | sectio...
Hi Meheretab,Thanks for the reply. I did apply next-hop-self before on R1 before which works. I was just trying to understand the behaviour. In this kind of scenario, Packet destined to 8.8.8.8 will always go to R1 from IBGP neighbors of R1 as R1 has...
Thank you so much for the explanation. If you could look at the topology I posted above, and clear my doubt, it would be great. I don't understand why I'm not able to reach the destination in it. Thanks again.
I have created a small topology which is attached below. I'm running R1,R2 & R3 in AS 1 and created full mesh. R3 is also connected to an external peer R4 which is in AS2. From AS2, I advertised a loopback address 4.4.4.4.
Now, R3 is learning 4.4.4...
Thank you, Richard. To sum it up, Any router running IBGP which learns any route from external peer will not advertise the routes to other IBGP speakers unless we have full mesh. Why do we have this behavior? Between, Do you mind If I post more ques...
