D-Link xStack DGS-3600 Series User Manual - Pim-Dm Configuration
xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch
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
L3 Features > IP Multicast Routing Protocol > PIM-DM > PIM-DM Global
Settings
. This will give the user access to the following screen:
Figure 8- 71. PIM DM Global Setting window
Use the pull down menu, choose
Enabled
, and click
Apply
to set the PIM-DM function on the Switch.
PIM-DM Interface Configuration
To view the
PIM-DM Table
, click
L3 Features >
IP Multicast Routing Protocol > PIM-DM > PIM-DM Interface Settings.
This window allows the
PIM-DM
to be configured for each IP interface defined on the Switch. Each IP interface configured on
the Switch is displayed in the below
PIM-DM Interface Settings
dialog box. To configure PIM-DM for a particular interface,
click the corresponding hyperlink for that IP interface. This will open the
PIM-DM Interface Settings
window:
Figure 8- 72. PIM-DM Interface Settings window
To view the configuration window for a specific entry, click its corresponding
Modify
button, revealing the following window.
Figure 8- 73. PIM-DM Interface Settings - Edit window
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