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    Configuring PIM Sparse-Dense Mode Properties

    Sparse-dense mode allows the interface to operate on a per-group basis in either sparse or dense mode. A group specified as “dense” is not mapped to an RP. Instead, data packets destined for that group are forwarded by means of PIM dense mode rules. A group specified as “sparse” is mapped to an RP, and data packets are forwarded by means of PIM sparse-mode rules. Sparse-dense mode is useful in networks implementing auto-RP for PIM sparse mode.

    By default, PIM is disabled. When you enable PIM, it operates in sparse mode by default.

    You can configure PIM sparse-dense mode globally or for a routing instance. This example shows how to configure PIM sparse-dense mode globally on all interfaces, specifying that the groups 224.0.1.39 and 224.0.1.40 are using dense mode.

    To configure the router properties for PIM sparse-dense mode:

    1. Configure the dense-mode groups.
      [protocols pim]user@host# set dense-groups 224.0.1.39user@host# set dense-groups 224.0.1.40
    2. Configure all interfaces on the routing device to use sparse-dense mode. When configuring all interfaces, exclude the fxp0.0 management interface by adding the disable statement for that interface.
      [edit protocols pim]user@host# set interface all mode sparse-denseuser@host# set interface fxp0.0 disable
    3. Monitor the operation of PIM sparse-dense mode by running the show pim interfaces, show pim join, show pim neighbors, and show pim statistics commands.
     

    Related Documentation

     

    Published: 2013-11-18

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