Hello everyone,

I tried searching the archives for some explaination on how route feedbacks
occur during redistribution. The search kept timing out so here I am asking
you guys about this. For example, a scenario concerning RIP and OSPF
redistributing thru a single router. 'Routing TCP/IP Vol I' explains that
distribute lists should be configured to prevent redistributed RIP routes to
be injected back into the RIP domain and vice versa.

OK, if split horizon is disabled in the RIP domain then maybe OSPF routes
may have a chance of being redistributed back to OSPF. However, I cannot
understand how OSPF can redistribute RIP learnt routes back into RIP.
Considering a scenario where the ASBR is in area 0 and redistributing the
RIP routes into OSPF. The ASBR would originate Type 5 LSAs and send them
throughout area 0 which eventually would reach the ABRs. Unless the ABRs are
able to send an update back to the ASBR indicating that RIP routes are
reachable via the ABRs, I don't see how route feedback would occur from
OSPF. I must be missing something here. I would really appreciate it if
someone can point this out. Thanks In Advance.



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