" When you look in R3's topology table (using the 'all-links' switch) to
view the entry for R1 Lo0, how is it organized? Don't we see a single entry
for 1.1.1.1/32 and then, indented, two different interfaces through which it
is reachable? If R3 were to consider that it had two unique
1.1.1.1/32prefixes in its topology table, wouldn't it stand to reason
that we'd see
two distinct entries instead? "
Yes the router does know that they are different - that it why it keeps the
prefix, interface and metric - those make the entries different evethought
you see them grouped in your topology table or routing table (case of
variance or exact equal path).
No offense, but I will invite you to re-read fundamental of distance vector
protocol - then Split Horizon - remember that this topic is tied to distance
vector protocol only - i.e. EIGRP (forget what they say about this being an
hybrid, it is a distance vector ) , IGRP and RIP.
Blogs and organic groups at http://www.ccie.net
Received on Mon Jan 10 2011 - 17:18:54 ART
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