GOLE: Glif Open Lightpath Exchange
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1 : Glif Open Lightpath Exchange ees de Laat University of msterdam
2 What is a? GLIF Open LightPath Exchange () model - Place where hybrid networks meet to exchange traffic - facilitate international interconnections - minimize quantity of colo, equipment and cards required minimize call blocking probability at optical exchange points Partly from a slide from Rene Hatem
3 GLIF Q Visualization courtesy of ob Patterson, NS Data collection by Maxine rown.
4 Optical Exchange as lack ox Optical Exchange Optical ross onnect Switch TDM Store & Forward DWDM mux/demux Terayte Service Freek Dijkstra, ees de Laat, "Optical Exchanges", GRIDNETS conference proceedings, oct 2004
5 Service Matrix From WDM (multiple!) Single!, any bitstream To WDM (multiple!) cross-connect multicast, regenerate, multicast WDM mux Single!, any bitstream WDM demux cross-connect multicast, regenerate, multicast SONET/ SDH WDM demux SONET/SDH WDM mux N/ SONET switch, + 1 Gb/s WDM demux LN PHY WDM demux WN PHY WDM demux VLN tagged WDM demux IP over WDM demux N/ N/ N/ N/ N/ N/ TDM demux 1 Gb/s WDM mux N/ TDM mux conversion + LN PHY WN PHY VLN tagged WDM mux N/ TDM mux 6 conversion WDM mux N/ SONET switch conversion WDM mux N/ TDM mux VLN decap TDM demux 6 eth. convert conversion + conversion VLN decap SONET switch conversion conversion conversion + VLN decap TDM demux VLN encap VLN encap VLN encap ggregate, VLN decap & encap + TDM demux L3 entry L3 entry L3 entry N/ IP over WDM mux N/ TDM mux L3 exit L3 exit L3 exit N/ Store & forward, L3 entry/exit+
6 msterdam Internet Exchange Purpose To facilitate traffic exchange between Internet providers Implementation asically a big switch ll networks connect on layer 2 MS-IX forwards traffic based on mac address only Peering relations are managed by the connecting networks themselves MS-IX does not need to know, setup or agree for peering to happen!
7 implementations Single switch implementation (SONET, L2) ombination of switches (SONET + L2) Extended (you connect anywhere and can peer with everyone else on the network)
8 Packet versus circuit issues MS-IX like internet exchanges do not need to know peering relations in order to forward traffic Those exchanges are not and do not need to be involved in decision taking about peerings In case of a the control plane of the infrastructure needs to know in order to set up the lightpath. Just having networks connected is not enough. In order to be an open neutral exchange the success of setup of circuits should depend on nothing more then technical issues (formats, capacity, etc.)
9 : Two approaches pproach 1: is actively involved in user path request signaling and network routing. is distinctly visible in the overall topology Participates in user request routing & signaling cts as a regular network domain, but is expected to honor any request from a member. (may not refuse members connections) pproach 2: is only involved in provisioning a negotiated topology between members. is not distinctly visible in the overall topology Does not participate in user request signaling & routing Is only controlled by attached members via P. Effects of the control may affect routing tables of member IDs
10 First approach G G Network Topology ID member ID member Inter-ID Path & Route Signaling ID Network G Network ID member SWITH Network
11 Second approach Network Topology Inter-ID Path & Route Signaling ID member ID member P Network Network ID member SWITH Network
12 Multi-implementation approach G Network Topology G NEEDS TO E STNDRDIZED OGF23 DR member utobahn member Inter-domain Path & Route Signaling ID Network G Network Home cooked member SWITH Network
13 Questions? See also: Freek Dijkstra, ees de Laat, "Optical Exchanges", GRIDNETS conference proceedings, oct Freek!Dijkstra, as!van!oudenaarde, ert!ndree, Leon!Gommans, Paola!Grosso, Jeroen!van der!ham, Karst!Koymans and ees!de!laat, " Terminology for ontrol Models at Optical Exchanges", LNS, Volume 4543, july 2007, Page 49-60
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