Follow up question on "next hop self"

[Nico Schottelius]

Hello,

I was wondering about how bird solves the following problem with next
hop self enabled:

R1 <-------->  R2
 \             /
  \           /
   upstream 1

So both routers receive the same routes from upstream and insert them
with the same local_pref. With "next hop self" on, both routers will
think that the path is not the same and potentially either of the two
routers could start routing via the other router instead of via upstream
directly.

What is the typical approach to solve this situation correctly?
Does making setting the local_pref lower if received from an
iBGP router make sense in that case?

Best regards,

Nico


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