national chi nan university multi-homing tunnel broker marcelo bagnulo, juan fco....
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National Chi Nan University
Multi-Homing Tunnel BrokerMarcelo Bagnulo,
Juan Fco. Rodríguez-Hervella, Alberto García-Martínez,
Arturo Azcorra
Universidad Carlos III de Madrid. Av. Universidad, 30 – Leganés, 28911 Madrid, SPAIN
EUROMICRO 2004: Rennes, France
Speaker: Burgundy Po-kang Chen
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National Chi Nan University
Problem Definition
• The wide adoption of RFC 3178 multi-homing solution implies the manual configuration of numerous tunnels on the ISPs, which may impose an important workload in ISP network administrators.
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National Chi Nan University
Background
• Multi-homing
– Imposing extra stress to the Default Free Zone routing table.
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National Chi Nan University
Background (cont.)
• End-site prefix aggregation
– Established connections will not be preserved in case of outage.
– Increased connection establishment time in case of failure.– Ingress filtering incompatibility.
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National Chi Nan University
Background (cont.)
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National Chi Nan University
Background (cont.)
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National Chi Nan University
Multi-Homing Tunnel Broker
• We assume that the ISP clients have a commercial relationship with the ISP, so that the ISP can identify its clients and the prefix that the ISP has assigned to them.
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National Chi Nan University
Multi-Homing Tunnel Broker (cont.)
• TS = Exit Router
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National Chi Nan University
Multi-Homing Tunnel Broker (cont.)
• TS is a specific router with lower prefix announcing preference.
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National Chi Nan University
Conclusion
• The Multi-Homing Tunnel Broker has been developed as a proof-of-concept.
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National Chi Nan University
Reference• Hagino, J. and H. Snyder, "IPv6 Multihoming Support at Site Exit Routers",
RFC 3178, October 2001.• Durand , A., Fasano , P., Guardini , I. and D. Lento, "IPv6 Tunnel Broker",
RFC 3053, January 2001.• T. Bates and Y. Rekhter, "Scalable Support for Multi-homed Multi-provider
Connectivity" , RFC 2260, January 1998.• Cisco Document, BGP Case Studies. [online] Available at: • http://www.cisco.com/en/US/tech/tk365/
technologies_tech_note09186a00800c95bb.shtml#howbgpwork• Wikipedia, Ingress filtering. [online] Available at:
http://en.wikipedia.org/wiki/Ingress_filtering• Wikipedia, Default-free zone. [online] Available at:
http://en.wikipedia.org/wiki/Default-free_zone• Wikipedia, Border Gateway Protocol. [online] Available at:
http://en.wikipedia.org/wiki/Bgp
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