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Literally, to behave as if someone, or some group, was your peer. ---- In telecommunications, peering is an arrangement whereby two parties (the peers) reciprocally exchange traffic ([IP] traffic or [POTS] traffic) with each other. Usually this traffic is exchanging without charging, on the assumption that each of the peers benefits from the relationship. Other less common forms of peering can include payment for traffic imbalances between the peers. !! Benefits of Peering From an end-user point of view peering is beneficial as it often means that traffic reaches the intended destination earlier (reducing latency and jitter). From an [ISP] point of view peering is beneficial as it reduces the amount of traffic passed on to your transit provider (hence lowering the cost of that link). From an transit provider's point of view, peering is often seen as a problem as it reduces customers reliance on transit connections (hence lowering their revenue). Traditionally peering happens between large players in the Internet market such as Telcos and ISPs, however there are also benefits for large sources or sinks of traffic to peer at a peering point for the same reasons as an ISP (it reduces their reliance on purchased transit). Organisations that need to be multihomed may also choose to connect to their providers at a peering point. !! Peering Information NewZealand currently has multiple active peering points all managed by CityLink * [APE] - [Auckland] Peering Exchange - Biggest by volume of traffic * [WIX] - [Wellington] Internet Exchange - Biggest by number of participants * [PNIX] - Palmerston North Internet Exchange - Quite small at the moment. * [DPE] - Dunedin Peering Exchange * [3CIX] - 3 Cities (Hutt City, Upper Hut, Porirua) Internet Exchange According to http://www.nzix.net/ webpages the following exchanges are also under construction. * Christchuch - (CHIX) * Southland - (SIX) * Hamilton - (HIX) An excellent introduction to peering is William B. Norton's paper "Internet Service Providers and Peering" downloadable from http://www.equinix.com/pdf/whitepapers/PeeringWP.2.pdf Keep an eye out for other William B. Norton papers as well, they are usually highly informative and well researched. !! Peering Discussion Peering breaks down when peers are not honest brokers for their customers--widespread peering increases redundancy and reduces the pressure on long-distance links, but there are certain pricing schemes which do not provide incentive for peers to do this. An apparent instance of this happening can be found here: http://www.nzherald.co.nz/storydisplay.cfm?storyID=3568316 Unfortunately the two largest telcos [Telecom] and [TelstraClear] no longer peer without charge, which causes problems when rats chew cables [http://computerworld.co.nz/news.nsf/UNID/F45502DE448D9635CC2570260002CF04?OpenDocument&Highlight=2,rat]. http://scorchio.pure-guava.org.nz/cgi-bin/wiki/kwiki.cgi?PeeringNotice %%% http://scorchio.pure-guava.org.nz/cgi-bin/wiki/kwiki.cgi?DePeeringForNewbies ---- CategoryNetworking
6 pages link to
Peering
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APE
DPE
3CIX
CityLink
PNIX
WIX
