From: mark forest (mforest@inetiq.com)
Date: Fri Sep 16 2005 - 15:17:51 GMT-3
Bill,
There are a variety of ways you can accomplish your mission here.
However, you need consider all the reasons you want to use BGP and all the
reason you want to be multi-homed. Do you plan on running only EBGP at your
ISP connections, or do you have plans of running IBGP within your AS. Do you
need a public AS number or will you be ok with private AS numbers. If you
are multi-homed you need to make sure you do not become a transit AS which
means you need to tune BGP so your ISP's do not see routes coming from your
AS that DO NOT originate from within you AS.
As far as the need to have BGP in play I tend to stay away from Weight as an
only evaluation point for creating preferential treatment of NLRI within an
AS. You need to take into consideration which routes need to be explicitly
dealt with, this goes for both routes originating within you AS, and routes
external to your AS. Do you desire to have BGP provide any load balancing
for your AS? Essentially you really need to formulate a list of questions or
concerns, then ask yourself why, then look at how you can best achieve your
desired result. Often times BGP comes into play as a desire but not a
necessity.
Also, do you have plans to peer with anyone beside your ISP. In other words,
you are severing your ties with the state and becoming private, but will
there be a need to peer or otherwise directly connect to the state backbone?
Once you have determined all of you primary objectives, asked yourself the
questions, and Why'd them, you should be in a position to evaluate what
features of your IGP's and BGP you need to take advantage of.
I am open to take this offline or in the public forum.
HTH
mf
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Bill
Faber
Sent: Friday, September 16, 2005 12:43 PM
To: ccielab@groupstudy.com
Subject: Internet Design question
Hey guys,
Here is an Internet design question. We are a state agency that is going
private 1/1/06. We have to sever our ties to the state government ISP that
provides all Internet traffic. I would prefer to get two different ISPs from
two different providers and run BGP.
Management wants two points-of-presence (HQ and DR) and if one site goes
down the other can broadcast the same addresses. We do have an internal
100mg data circuit between the HQ and DR.
If we want to do this with 2 ISPs, how is it accomplished? Is my thinking of
weighted routes on the back side. You thought are appreciated.
Bill
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