D-Link DGS-3600 Series User Manual page 245

The following fields can be set:
Parameter
Interface Name
IP Address
Neighbor Timeout
(1-65535 sec)
Probe Interval (1-
65535 sec)
Metric (1-31)
State
Click Apply to implement changes made. Click
window.
PIM
PIM or Protocol Independent Multicast is a method of forwarding traffic to multicast groups over the network using any pre-
existing unicast routing protocol, such as RIP or OSPF, set on routers within a multicast network. The Switch supports three types
of PIM, Dense Mode (PIM-DM), Sparse Mode (PIM-SM), and Sparse-Dense Mode (PIM-DM-SM).
PIM-SM
PIM-SM or Protocol Independent Multicast – Sparse Mode is a method of forwarding multicast traffic over the network only to
multicast routers who actually request this information. Unlike most multicast routing protocols which flood the network with
multicast packets, PIM-SM will forward traffic to routers who are explicitly a part of the multicast group through the use of a
Rendezvous Point (RP). This RP will take all requests from PIM-SM enabled routers, analyze the information and then returns
multicast information it receives from the source, to requesting routers within its configured network. Through this method, a
distribution tree is created, with the RP as the root. This distribution tree holds all PIM-SM enabled routers within which
information collected from these routers are stored by the RP.
Two other types of routers also exist with the PIM-SM configuration. When many routers are a part of a multiple access network,
a Designated Router (DR) will be elected. The DR's primary function is to send Join/Prune messages to the RP. The router with
the highest priority on the LAN will be selected as the DR. If there is a tie for the highest priority, the router with the higher IP
address will be chosen.
The third type of router created in the PIM-SM configuration is the Boot Strap Router (BSR). The goal of the Boot Strap Router is
to collect and relay RP information to PIM-SM enabled routers on the LAN. Although the RP can be statically set, the BSR
®
xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch
Figure 8- 84. DVMRP Interface Settings - Edit window
Description
Displays the name of the IP interface for which DVMRP is to be configured. This must be a
previously defined IP interface.
Displays the IP address corresponding to the IP Interface name entered above.
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 seconds.
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.
Show All DVMRP Interface Entries to return to the DVMRP Interface Settings
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