From: Cox, Bryan (bryan.cox@xxxxxxxxxxxxxx)
Date: Mon Sep 03 2001 - 01:07:58 GMT-3
Group,
I am noticing some subtle aspects of route redistribution of connected
interfaces. I have noticed this previously but I looked into it a bit
tonight while working on CCbootcamp's lab 16.
R1 is the hub and it is redistributing between OSPF and EIGRP.
R2 is running EIGRP and is a spoke connected to R1.
R3 is running OSPF and is a spoke connected to R1.
Here is what I have noticed and I am wondering if anyone else can validate
it:
The R3 OSPF router has an external route to the EIGRP network between R1 &
R2.
The R2 EIGRP router does not have an external route to the OSPF network
between R1 & R3 unless I use a redistribute connected under the EIGRP
process or if I include the OSPF network under the EIGRP process with a
network statement.
I think this is because the router LSA being sent from R1 to R3 includes
information about all of the hub's links including the non OSPF interfaces.
Whereas the EIGRP process does not advertise the spoke on the OSPF side
because it sends only information about links that have been placed in the
EIGRP process via either network statements or redistribution of connected
routes.
In the lab solution the OSPF spoke network shows up as an EIGRP External
route at the EIGRP spoke but I haven't been able to replicate that on
12.0(18)
Anybody else notice this behavior?
Bryan
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