D-Link DES-3326S manual PIM-DM Interface Configuration, 246

DES-3326S Layer 3 Fast Ethernet Switch User’s Guide

PIM-DM has no explicit ‘join’ messages. It relies upon periodic flooding of multicast messages to all interfaces and then either waiting for a timer to expire (the Join/Prune Interval) or for the downstream routers to transmit explicit ‘prune’ messages indicating that there are no multicast members on their respective branches. PIM-DM then removes these branches (‘prunes’ them) from the multicast delivery tree.

Because a member of a pruned branch of a multicast delivery tree may want to join a multicast delivery group (at some point in the future), the protocol periodically removes the ‘prune’ information from its database and floods multicast messages to all interfaces on that branch. The interval for removing ‘prune’ information is the Join/Prune Interval.

To configure PIMDM for an IP interface, click the PIMDM Interface Configuration link under the IP Multicast Routing Protocols folder:

Figure 6-50. PIM-DM Interface Configuration

The Protocol Independent Multicast − Dense Mode (PIM-DM) protocol can be individually configured for each IP interface on the switch. The PIM-DM Interface Configurations dialog box will display all of the IP interfaces currently configured on the switch.

246 Web-Based Switch Management