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OBGP

OBGP. Proposed new version of BGP where control of optical routing and switches across an optical cloud is by the customer – not the carrier Establishment of BGP neighbors or peers triggers process to establish light path cross connects

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OBGP

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  1. OBGP • Proposed new version of BGP where control of optical routing and switches across an optical cloud is by the customer – not the carrier • Establishment of BGP neighbors or peers triggers process to establish light path cross connects • Customers control of portions of OXC which becomes part of their AS • Optical cross connects look like BGP speaking peers – serves as a proxy for link connection IP address, loopback address, etc • Traditional BGP gives no indication of route congestion or QoS, but with DWDM wave lengths edge router will have a simple QoS path of guaranteed bandwidth • Wavelengths will become new instrument for settlement and exchange eventually leading to futures market in wavelengths • May allow smaller ISPs and R&E networks to route around large ISPs that dominate the Internet by massive direct peerings with like minded networks

  2. OBGP Peering • Technique for allowing automatic peering at IXs between consenting ISPs • External routers are given control of specific ports on the OXC • The router that controls switch can act as an optical route server notifying all peers of any new consenting OBGP peers • External routers signal to each other if they wish to setup direct optical connection • Choice of partner can be based on size of traffic flows • Partners can be changed through a routing flap • Prototype OBGP switch now under development at CANARIE • Working with universities in Chicago area to deploy first OIX

  3. Business Case for Direct Peering • Typical Internet transit costs - $1000/Mbps per month • For 100 Mbps Internet transit then $100,000/mo • But coast to coast 100 Mbps channel is $1000/mo (e.g. www.Cogent.com) • New optical technology will reduce that cost further • Compelling business case to do as much no-cost direct peering as possible • See http://www.nanog.org/mtg-0010/tree.doc • OBGP is a proposed protocol that will allow massive direct peerings • Each optical switch is in effect a mini-IX to allow direct no cost peering • OBGP will also automate peering relationships • For example Telia claims that they save 75% in Internet transit fees with massive direct peering

  4. Target Market for OBGP • University research and community networks who are deploying condominium fiber networks who want to exchange traffic between members of the community but who want to maintain customer control of the network at the edge and avoid recreating the need for aggregating traffic via traditional telco service • E.g. Ottawa fiber build, Peel County, I-wire, SURAnet, G-Wire, CENIC DCP, SURFnet, etc etc • Next generation fiber companies who are building condominium fiber networks for communities and school boards and who want to offer value added fiber services but not traditional telco service • E.g. C2C, Universe2u, PF.net, Williams, QuebecTel, Videotron, etc • Next generation collocation facilities to offer no-cost peering and wavelength routing • Metromedia, Equinix, LINX, PF.net, LayerOne, Westin, PAIX, Abovenet.com, Colo.com, etc etc • Over 500 Ixs and carrier hotels worldwide

  5. BGP Peering Today AS 1 Default Peering AS 6 Transit Traffic Large ISP $$$$ AS 7 AS 3 AS 4 AS 1 has large traffic flows with AS 4 and ideally would like to establish direct no cost peering with AS 4 AS4 will do no cost peering

  6. BGP Peering Tomorrow Optical switch is controlled by AS 1 who decides which network it wishes to peer with AS 1 AS 6 Default Peering Transit Traffic Large ISP $$$$ AS 7 AS 3 AS 4 Will do no cost peering AS 4

  7. OBGP Peering Logical Optical Cross Connect looks like a BGP router within AS 1 AS 1 has now direct peering with AS 6 and AS4 and bypasses AS 3 for this traffic AS 1 Default Peering AS 6 Direct Peering Transit Traffic Large ISP $$$$ AS 7 At some future date AS 1 may instead decide to peer with AS 7. It would then terminate BGP peering with AS 4 and establish a new peer with AS 7 AS 3 AS 4 AS 4 Will do no cost peering

  8. Why make OXC speak BGP? • To date all optical networks have been designed around the single carrier cloud architecture • Virtually no work done on “interdomian” optical network design • With OBGP no need for underlying optical control plane • No need to recreate an interdomain routing protocol and topology • All optical switches look like mini “IXs” • BGP is the only true interdomain, autonomous peering protocol • Routing topology is conveyed through AS paths • Changes in network topology can be conveyed through routing updates • OXC can also be distributed with MPLambdaS or ODSI • Routing policy is maintained at optical cross connects • Routers on either side of an optical switch do not have to know of each other’s presence • OBGP protocol establishes link IP address assignment and serves as intermediate proxy for all protocol negotiation

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