Pim-Dm Interface Configuration - D-Link xStack DES-3800 Series User Manual

Neighbor Timeout
Interval (1-65535)
Probe Interval (1-
65535)
Metric (1-31)
State
Click Apply to implement changes made. Click
DVMRP Interface Settings window.

PIM-DM Interface Configuration

The Protocol Independent Multicast - Dense Mode (PIM-DM) protocol should be used in networks
with a low delay (low latency) and high bandwidth as PIM-DM is optimized to guarantee delivery of
multicast packets, not to reduce overhead.
The PIM-DM multicast routing protocol is assumes that all downstream routers want to receive
multicast messages and relies upon explicit prune messages from downstream routers to remove
branches from the multicast delivery tree that do not contain multicast group members.
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.
PIM-DM Configuration
To enable PIM-DM globally on the Switch, go to Layer 3 Features > IP Multicast Routing Protocol
> PIM-DM > PIM-DM Interface Settings. This will give the user access to the following screen:
Use the pull down menu, choose Enabled, and click Apply to set the PIM-DM function on the Switch.
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
This field allows an entry between 1 and 65,535 seconds and defines the time period
DVMRP will hold Neighbor Router reports before issuing poison route messages. The
default is 35 seconds.
This field allows an entry between 1 and 65,535 seconds and defines the interval
between 'probes'. The default is 10.
This field allows an entry between 1 and 31 and defines the route cost for the IP
interface. The DVMRP route cost is a relative number that represents the real cost of
using this route in the construction of a multicast delivery tree. It is similar to, but not
defined as, the hop count in RIP. The default cost is 1.
This field can be toggled between Enabled and Disabled and enables or disables
DVMRP for the IP interface. The default is Disabled.
Figure 8- 58. PIM DM Global Setting window
Show All DVMRP Interface Entries
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