Transcript Network Design for Hybrid International Infrastructure

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HOPI: Hybrid Packet and Optical
Infrastructure
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Chris Robb and Jim Williams
Indiana University
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7 July 2004
Cairns, AU – APAN meeting
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The Hybrid Packet and Optical
Testbed (HOPI)
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• 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?
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Initial HOPI Resources
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• Internet2 Abilene Network
– Provides packet-based transport for Abilene
participants
• Internet2 NLR 10G lambda
– Provides layer2 optical path on the nation-wide
NLR footprint
– Northern path already provisioned with 10GigEframed transponder cards
– Investigating the provisioning possibilities on
southern route
• The lambda resource pool is expected to
expand as NLR is placed into production
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HOPI Topology
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• HOPI nodes will be (tentatively) located in cities that have both an
NLR terminal node and an Abilene core node:
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Seattle
Los Angeles
Sunnyvale
Denver
Chicago
Washington D.C.
Atlanta
New York
• In most cases, HOPI nodes will be located in or near the NLR POPs in
Level3 facilities
• The HOPI Design Team is currently working city by city to determine
what fiber assets need to be acquired to interconnect Abilene with
HOPI
NLR/Abilene Map
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Initial HOPI Node Design
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• 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 (a
MEMS switch)
– Ethernet switch or TDM device
• The type of device will depend on the framing selected on the
NLR footprint [10GE or OC-192]
– Measurement and control PCs
– Small out-of-band router for remote access
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HOPI Node Interconnections
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• All HOPI equipment connections will pass
through a 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 the 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 will also be
connected through the fiber cross connect device
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HOPI Node Diagram
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Connecting to HOPI
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• Two immediate possibilities:
– Via Abilene (packet network)
– Via HOPI node connection (regional optical networks)
• 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, US
Regional Optical Networks (RONs) will connect
directly to the HOPI node
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Connecting via Abilene
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• Abilene will maintain a 10GigE or OC-192
connection to each HOPI node via the fiber crossconnect 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
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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?
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Connecting directly to HOPI
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• Direct HOPI connections will land on the fiber cross
connect device
– US RON will have access to “lightpath slots” on the TDM device
– 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 L3 NLR POPs 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
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International Connections to
HOPI
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• Some work has already been done in coordination with
Canada and Europe to test HOPI-like functionality on
current network infrastructure
– MPLS from Abilene LA to Chicago; handoff to GigE TDM circuit
across Canarie to MANLAN in New York; across a GigE channel
in the IEEAF circuit to Amsterdam; across GEANT’s network as
IP packets with premium service to land at CERN
• International networks should be able to connect via their
IP connections to Abilene, or “TDM-able” connections to
international exchange points such as STARLIGHT or
MANLAN (IRNC expansions)
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References
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• HOPI Testbed Webpage:
– http://networks.internet2.edu/hopi/
• Internet2 Abilene Network:
– http://abilene.internet2.edu/
• National Lambda Rail (NLR)
– http://www.nlr.net/
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Questions??
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• Chris Robb
[email protected]
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• Jim Williams [email protected]