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HOPI: Making the Connection

HOPI: Making the Connection. Chris Robb 23 June 2004 Broomfield, CO Quilt Meeting. The Hybrid Packet and Optical Testbed (HOPI).

georgia-becker
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HOPI: Making the Connection

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  1. HOPI: Making the Connection Chris Robb 23 June 2004 Broomfield, CO Quilt Meeting

  2. The Hybrid Packet and Optical Testbed (HOPI) • The HOPI testbed is meant to allow for investigation into the issues of combining the optical, lambda-based connectivity model with the traditional packet-switched model • What defines a deterministic path? • How can you provide for a deterministic path? • How do you allow for dynamic lightpath creation on an inter-domain basis • How dynamic does lightpath creation need to be?

  3. Initial HOPI Resources • Internet2 Abilene Network • Provides packet-based transport for Abilene participants • NLR 10G lambda • Provides layer2 optical path on the nation-wide NLR footprint • Northern path already provisioned with 10GigE-framed transponder cards • Investigating the availability of OC-192 trib cards on southern route • The lambda resource pool is expected to expand as HOPI is placed into production

  4. HOPI Topology • HOPI nodes will be (tentatively) located in cities that have both an NLR terminal node and an Abilene core node: • Seattle • Los Angeles • Sunnyvale • Denver • Chicago • Washington D.C. • Atlanta • The HOPI Design Team is currently working city by city to determine what fiber assets need to be acquired to interconnect Abilene with HOPI • In most cases, HOPI nodes will be located in or near the NLR POPs

  5. NLR/Abilene Map

  6. Initial HOPI Node Design • The HOPI Design Team is currently working out the specifics of the common node design • Initial designs call for the following: • Remotely manageable fiber cross-connect device (MEMS?) • Ethernet switch or TDM device • The type of device will depend on the framing selected on the NLR footprint • Measurement and control PCs • Small out-of-band router

  7. HOPI Node Interconnections • All HOPI equipment connections will pass through the fiber cross connect device • Allows engineers more flexibility without waiting for hands-and-eyes support to arrive on site • NLR lambdas (east and west) will both connect into fiber cross-connect device • Allows for connection to the node TDM device as well as a pass-through mode that simply connects the east and west NLR lambdas • Abilene-HOPI interconnection fiber also connected through fiber cross connect device

  8. HOPI Node Diagram

  9. Connecting to HOPI • Two immediate possibilities: • Via Abilene • Via HOPI node connection • During the test phase, we expect the initial tests involving Abilene participants to be made via Abilene’s packet-based network • As HOPI grows, and becomes more solidified, RONs will connect directly to the HOPI node

  10. Connecting via Abilene • Abilene will maintain a 10GigE or OC-192 connection to each HOPI node via the fiber cross-connect device • Abilene participants that don’t have direct fiber connectivity to HOPI will be “piped” across Abilene to the closest HOPI node • MPLS L2 VPN tunnels • MPLS encapsulation and signaling are currently being handled on a case-by-case basis • Abilene currently favors MPLS CCC, although we’re open to testing Kompella and Martini • The current “strawman” scenario is an Abilene participant that obtains an MPLS tunnel that connects them to a layer2 connection across the HOPI TDM portion of the network

  11. Packet entry-point lightpath signaling • During the HOPI testbed phase, MPLS tunnels will be provisioned in a static manner • One of the major charges of the HOPI testbed is to elucidate the issues surrounding dynamic provisioning of the MPLS tunnels and the interconnection with HOPI lightpath resources • GMPLS? Not much vendor support yet • UCLP? CA*Net4’s dynamic provisioning system created to dynamically allocate SONET TDM slots on the Cisco 15454 platform • Something entirely different? In the future, will you be able to create a lightpath across different domains with something like RSVP?

  12. Connecting directly to HOPI • Direct HOPI connections will land on the fiber cross connect device • RON will have access to “lightpath slots” on the TDM device • Alternatively, they will have access to the entire 10G wave from NLR • This will become more practical as HOPI acquires multiple lambdas from NLR • Since HOPI nodes will largely be based in Level3 POPs, RONs that are acquiring fiber to NLR will have the capability to connect to HOPI through the same channels • There may be a need for an intra-building fiber jumper in some cities

  13. References • HOPI Testbed Webpage: • http://networks.internet2.edu/hopi/

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