Configuring the ECN330-switch
4851553-KDU 137 365 Uen D 2006-06-16
Web – Click Routing Protocol, PIM-DM, General Settings. Enable or disable
PIM-DM globally for the router, and click Apply.
Figure 224 PIM-DM General Settings
CLI – This example enables PIM-DM globally and displays the current status.
6.21.4.2 Configuring PIM-DM Interface Settings
To fully enable PIM-DM, multicast routing needs to be enabled globally for the
router (page 469), then enable PIM-DM globally for the router (page 484), and
also enable PIM-DM for each interface that will participate in multicast routing.
Command Usage
• PIM-DM functions similar to DVMRP by periodically flooding the
network with traffic from any active multicast server (page 473). It also
uses IGMP to determine the presence of multicast group members. The
main difference, is that it uses the router’s unicast routing table to
determine if the interface through which a packet is received provides
the shortest path back to the source.
• Dense-mode interfaces are subject to multicast flooding by default, and
are only removed from the multicast routing table when the router
determines that there are no group members or downstream routers, or
when a prune message is received from a downstream router.
• The interface settings that control the prune and graft messages (prune
holdtime) should be configured to the same values on all routers
throughout the network to allow PIM to function properly.
Console(config)#router pim dense mode
Console#show router pim
PIM Dense-Mode Admin Status: Enabled
PIM Sparse-Mode Admin Status: Disabled
Console#
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