[45219] in North American Network Operators' Group
RE: AS migration
daemon@ATHENA.MIT.EDU (Justin M. Streiner)
Tue Jan 22 16:21:50 2002
Date: Tue, 22 Jan 2002 16:11:40 -0500 (EST)
From: "Justin M. Streiner" <streiner@stargate.net>
Reply-To: streiner-nanog@lurch.bv.sgi.net
To: nanog@merit.edu
In-Reply-To: <26C1741C1863524B8F6DECC019A1C9059ADE1D@exchange.cbeyond.net>
Message-ID: <Pine.GSO.4.02.10201221603000.18027-100000@lurch.noc.sgi.net>
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On Tue, 22 Jan 2002, Miguel de Leon Dimayuga wrote:
> Collapsing AS'es has its technical benefits, ultimately
> resulting in financial benefits. For starters, you'll
> be able to manage your transit traffic better (and thus
> grow your pipes in a more sane manner).
I'm also looking at it from the perspective of making peering with various
providers or in various exchanges a more compelling business driver, as
opposed to putting all of the $$ into transit.
> You'll also be able to control your inter-AS traffic much
> better (especially if you plan to eventually collapse and
> use common servers/services across AS'es). An example of
> this is collapsing your news server farms or mail server
> farms.
Most of the service/server consolidation has already been done.
> One approach we took before merging AS'es is to make
> sure you have a common local pref and community
> infrastructure among the AS'es you want to merge.
> attempting to go confeds with mismatching local pref
> and community based policies might be a headache.
I designed both for all of the other ASes so they're all similar in
design.
> On the IGP front, make sure that your private networks
> are distinct among AS'es. Once you merge OSPF entities,
> you could have duplicate 192.168.x.x spaces.
My big concern is controlling IGP growth as a whole. Each of the ASes
is running their own independent OSPF implementation. Dealing with all of
those disjoint backbone areas and rolling them into one AS while
minimizing/eliminating service disruptions for my customers has been a
source of constant brow-beating.
> That's a start. my 0.02 cents worth.
Much appreciated.
jms
