From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Wed Aug 04 2004 - 15:07:57 GMT-3
At 1:47 PM -0400 8/4/04, McNeace, Roger wrote:
>What do you guys think of the book "BGP Design and Implementation"
>by Cisco Press.
To have success in a complex BGP implementation, the first requisite,
if it doesn't seem to Zen-ish, is to stop thinking about BGP features
and start thinking about what policies you want to implement.
Defining them, at least informally, in the Routing Policy
Specification Language will help enormously in working out the logic
before trying to play with BGP knobs.
>
>-----Original Message-----
>From: James [mailto:james@towardex.com]
>Sent: Wednesday, August 04, 2004 1:39 PM
>To: Howard C. Berkowitz
>Cc: Group Study
>Subject: Re: Enterprise BGP Design
>
>
>> Phil Smith and Barry Greene do have a book on the subject, Cisco ISP
>> Essentials.
>
>ahhh yes. That book is certainly one of those must-have from Cisco Press
>in my opinion (may be not so related to CCIE studies, but more so in
>real life).
>:) Barry and Phil in that book mostly speak straight out of experience, rather
>than theoratical content which is what I enjoyed the most. Then they have the
>whole sample topology and configuration set at the end.
>
>I should look into the two other books you listed later on, thanks
>for the info!
>
>-J
>
>> I also have NANOG presentations and two books in this
>> area, the books coming at the problem a little differently: one, WAN
>> Survival Guide, is more oriented to the enterprise interface to the
>> carrier, and the other, Building Service Provider Networks, is the
>> complement at the provider side of the network.
>>
>> As James suggests, the line between complex enterprise and service
>> provider can get blurry. For example, with one multinational
>> enterprise that was extremely distributed, the policy requirements
>> were such that each region needed to be a confederation AS, typically
>> associated with one IGP domain, and then there was a
>> backbone-of-backbones with the main AS number. Since there was
>> connectivity to ISPs all over the world, there was some connectivity
>> directly from confederation AS. Depending on the specific
>> requirements, the confederation could be a registered AS number, use
>> the main number, or use a private ASN.
>>
>> >
>> >IMHO, I'd use IBGP at the core. Run EBGP with upstreams, and any downstream
>> >sites requiring bgp hookup to the backbone.
>> >
>> >HTH,
>> >-J
>> >
>> >
>> >--
>> >James Jun TowardEX
>> >Technologies, Inc.
>> >Technical Lead Network Design, Consulting, IT
>> >Outsourcing
>> >james@towardex.com Boston-based Colocation &
>> >Bandwidth Services
>> >cell: 1(978)-394-2867 web: http://www.towardex.com , noc:
>> >www.twdx.net
>> >
>> >_______________________________________________________________________
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>
>--
>James Jun TowardEX
>Technologies, Inc.
>Technical Lead Network Design, Consulting, IT
>Outsourcing
>james@towardex.com Boston-based Colocation &
>Bandwidth Services
>cell: 1(978)-394-2867 web: http://www.towardex.com , noc:
>www.twdx.net
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
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