WO2011060420A3 - Method for the provision of gateway anycast virtual mac reachability in extended subnets - Google Patents

Method for the provision of gateway anycast virtual mac reachability in extended subnets Download PDF

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Publication number
WO2011060420A3
WO2011060420A3 PCT/US2010/056834 US2010056834W WO2011060420A3 WO 2011060420 A3 WO2011060420 A3 WO 2011060420A3 US 2010056834 W US2010056834 W US 2010056834W WO 2011060420 A3 WO2011060420 A3 WO 2011060420A3
Authority
WO
WIPO (PCT)
Prior art keywords
gateway
anycast
mac address
port
extended
Prior art date
Application number
PCT/US2010/056834
Other languages
French (fr)
Other versions
WO2011060420A2 (en
Inventor
Victor M. Moreno
Robert Starmer
Sanjay Sane
Original Assignee
Cisco Technology, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cisco Technology, Inc. filed Critical Cisco Technology, Inc.
Priority to EP10791009.3A priority Critical patent/EP2502389B1/en
Priority to CN201080051754.XA priority patent/CN102668463B/en
Publication of WO2011060420A2 publication Critical patent/WO2011060420A2/en
Publication of WO2011060420A3 publication Critical patent/WO2011060420A3/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone
    • H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/35—Switches specially adapted for specific applications
    • H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches

Abstract

A method and apparatus is disclosed for providing gateway anycast virtual MAC reachability in extended subnets. When an extended L2 subnet spans more than one geographical location, it is desirable that the gateway MAC addresses learned in each location be the same across all IP hosts. Accordingly, the gateway MAC address may be preserved (i.e., programmed) in more than one port on a bridge, such as both a local port and a LAN extension port. The bridge may forward traffic having the anycast MAC address to the closest instance of the MAC address, rather than replicating the traffic to the multiple ports on which the anycast MAC address is programmed. If the gateway reachable on the local port goes down, the frame may be forwarded to the local gateway in the second layer 2 subnet over the LAN extension port.
PCT/US2010/056834 2009-11-16 2010-11-16 Method for the provision of gateway anycast virtual mac reachability in extended subnets WO2011060420A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10791009.3A EP2502389B1 (en) 2009-11-16 2010-11-16 Method for the provision of gateway anycast virtual mac reachability in extended subnets
CN201080051754.XA CN102668463B (en) 2009-11-16 2010-11-16 In expansion subnet, provide gateway to broadcast arbitrarily the method for Virtual MAC accessibility

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/619,425 US8848508B2 (en) 2009-11-16 2009-11-16 Method for the provision of gateway anycast virtual MAC reachability in extended subnets
US12/619,425 2009-11-16

Publications (2)

Publication Number Publication Date
WO2011060420A2 WO2011060420A2 (en) 2011-05-19
WO2011060420A3 true WO2011060420A3 (en) 2011-07-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/056834 WO2011060420A2 (en) 2009-11-16 2010-11-16 Method for the provision of gateway anycast virtual mac reachability in extended subnets

Country Status (4)

Country Link
US (1) US8848508B2 (en)
EP (1) EP2502389B1 (en)
CN (1) CN102668463B (en)
WO (1) WO2011060420A2 (en)

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Also Published As

Publication number Publication date
US20110116509A1 (en) 2011-05-19
EP2502389B1 (en) 2019-09-11
WO2011060420A2 (en) 2011-05-19
CN102668463B (en) 2015-10-21
EP2502389A2 (en) 2012-09-26
US8848508B2 (en) 2014-09-30
CN102668463A (en) 2012-09-12

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