L2TP over IPSec Multicast Tunneling

Discussion in 'Cisco' started by leecalcote, Mar 12, 2007.

  1. leecalcote

    leecalcote Guest

    I'm currently trying to work through an L2TP over IPSec remote access
    setup using a Cisco ASA 5520. I'm able to successfully connect
    Windows 2000/XP clients, and various Linux distro clients. What I am
    having difficulty performing is the tunneling of multicast traffic (in
    the range of to for example). Multicast
    traffic does not flow down the established tunnel, but follows its
    physical interface connection instead.

    Any thoughts?
    leecalcote, Mar 12, 2007
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  2. leecalcote

    Smokey Guest

    In routers you can use GRE tunnels over IPSEC to accomplish this. You
    could create a GRE tunnel (GRE tunnel use unicast), this allow you to
    encapsulate multicast packet into a unicast packet.
    However the PIX, IMHO, does not support the encrypting of multicast
    packets. So in this situation I do not think your solution will work.

    Just my opinion....

    Smokey, Mar 12, 2007
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