My 2 cents,
Sometimes, the remote peer AS( same AS or different as ) may be using the AS
for their filtering or metrics, etc. AS-SET may bring loop too.
=====
(1) Easier the better
(2) With route-map you can do additional and can use AND /OR logic.
(3) Order of route-map and filter-list is also important if they apply both.
From: [email protected]
To: [email protected]
Date: Tue, 19 Jan 2010 17:21:25 +0000
Subject: [OSL | CCIE_RS] AS-SET & FILTER-LIST
I just re-read TCP/IP Vol 2 this weekend (I know Mr. Excitement) and after
reading through some of his examples on aggregation. One of my major
questions is why wouldn’t we use the AS-SET when we’re only doing
Summary-Only. (More specifically in the real world)
IE.
Router BGP 100
Aggregrate-address 128.83.0.0 255.255.0.0 summary-only as-set
I also found that the FILTER-LIST command is a lot easier than do neighbor
route-maps when filtering off of just AS-Paths. Is there a rule of logic when
you have a ROUTE-MAP and FILTER-LIST. Does it apply against both?
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