how does proxy mobile ip work with arp on the mobile node?

Discussion in 'Wireless Internet' started by Debbie Craft, Oct 29, 2004.

  1. Debbie Craft

    Debbie Craft Guest

    I don't understand how a mobile node that has
    moved subnets can talk to the rest of the network
    when using proxy mobile ip. Does anyone know how
    this works?

    ARP is L2(ish) and i get we don't want to create a
    giant L2 network by bridging all traffic both directions
    between an access point to the mobile node over the wifi link.

    So we use mobile ip at the ip layer.

    The problem is when a mobile node shifts subnets
    it is now on the wrong network.

    The only thing i can think of is the AP intercepts
    all packets from mobile nodes and transforms them
    somehow. This turns an AP into router which it is
    probably underpowered to do, especially as the
    wifi side gets faster.
     
    Debbie Craft, Oct 29, 2004
    #1
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  2. www.tcpipguide.com has a chapter on mobile IP that explains how this is
    done.
     
    Barry Margolin, Oct 30, 2004
    #2
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