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Create a Multicast Tunnel


To create a multicast tunnel:

    1. Click the Multicast Tunnels link in the Config Tool main menu.
    The Multicast Tunnels View is presented. If there are currently no multicast tunnels, this view presents only a field in which to enter the IP address of a new tunnel. The following figure shows an example.


If tunnels have been created, a list of existing tunnels is presented. The following figure shows an example of this view.


    2. Type the destination IP address for a new outgoing tunnel in the Create New Tunnel field.
    This should be the IP address of a valid interface on a remote system.
    3. Click either the Apply button to use these parameters
    or
    Click the Top button to disregard these parameters and return to the previous view.

    The Apply successful message appears if no errors occur. The Multicast Tunnels View changes to display additional fields into which you enter parameters for the new tunnel.
    4. (Optional) Type a value in the Threshold field.
    This is the multicast packet time-to-live (TTL) value. Outgoing multicast packets must exceed this value in order to be forwarded through the tunnel. You can use TTL thresholds to provide administrative scoping.
    5. (Optional) Type a value in the Rate Limit field.
    This value is the maximum bandwidth available to the tunnel. Restricting this bandwidth enable you to constrain the utilization of wide-area transit resources consumed by multicast traffic.
    6. (Optional) Type a value in the Metric field.
    Enter a value between 1 and 32. This value is the number of hops, or cost of sending the packet through the tunnel. Enter a lower value (lower cost) to enable DVMRP to use this information when selecting an appropriate route.

    A value of 32 indicates that the route is unreachable.
    7. (Required) Type the IP address in the Local Address field.
    Enter the source IP address of the multicast tunnel. The value you enter must be an actual interface address in the system.
    8. Click either the Apply button to use these parameters
    or
    Click the Top button to disregard these parameters and return to the previous view.
    9. Create a tunnel on the remote system to use the same address as you entered in Step 6.
    At the remote end, this address is the destination address. The tunnel destination address you entered in the Multicast Tunnels View is the local address of the remote interface.

The tunnel becomes available for routing as soon as both the Destination and the Local IP Address have been committed.


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