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Chapter 10: Configuring Multicast Routing on the SSR
6.
Enable and disable DVMRP on tunnels.
To enable DVMRP on a tunnel, select that tunnel from the Available Tunnels list and
click the Add button.
To disable DVMRP on a tunnel, select that tunnel from the DVMRP Tunnels list and
click the Remove button.
7.
Click OK.
The tunnels on which DVMRP is enabled are included in the list of tunnels found in
the DVMRP Tunnels object. The tunnels on which DVMRP is disabled are included in
the list of tunnels found in the IP Tunnel Configuration object.
What Is IGMP?
IGMP is a group-management protocol between hosts and routers. IP hosts use IGMP to
report their host group memberships to multicast routers.
The SSR implements IGMP routing as specified in RFC 2236. Although the SSR runs
IGMP v2, the SSR supports backward compatibility for hosts running IGMP v1.
An IGMP interface checks which multicast groups have members on the LAN to which
the SSR is attached and to create routes for each multicast group.
154
Figure 85. DVMRP Tunnel dialog box
CoreWatch User's Manual
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