xStack
®
DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch CLI Manual
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44
DVMRP
C
OMMANDS
The DVMRP commands in the Command Line Interface (CLI) are listed (along with the appropriate parameters) in the following
table.
DVMRP is a distance-vector multicast routing protocol designed to support the forwarding of multicast datagrams through an inter-
network. DVMRP can be summarized as a "broadcast & prune" multicast routing protocol. It builds per-source broadcast trees based
upon routing exchanges, then dynamically creates per-source-group multicast delivery trees by pruning the source's truncated
broadcast tree. It performs Reverse Path Forwarding checks to determine when multicast traffic should be forwarded to downstream
interfaces. In this way, source-rooted shortest path trees can be formed to reach all group members from each source network of
multicast traffic.
Command Parameters
config dvmrp
[ipif <ipif_name 12> | all] {metric <value 1-31> | probe <sec 1-65535> |
neighbor_timeout <sec 1-65535> | state [enable | disable]}
enable dvmrp
disable dvmrp
show dvmrp neighbor
{ipif <ipif_name 12> | ipaddress <network_address>}
show dvmrp nexthop
{ipaddress <network_address> | ipif <ipif_name 12>}
show dvmrp routing_table
{ipaddress <network_address>}
show dvmrp
{ipif <ipif_name 12>}
Each command is listed, in detail, in the following sections.
config dvmrp
Purpose
Used to configure DVMRP on the Switch.
Syntax
config dvmrp [ipif <ipif_name 12> | all] {metric <value 1-31> | probe
<sec 1-65535> | neighbor_timeout <sec 1-65535> | state [enable |
disable]}
Description
This command is used to configure DVMRP on the Switch.
Parameters
ipif <ipif_name 12>
−
The name of the IP interface for which DVMRP is
to be configured.
all
−
Specifies that DVMRP is to be configured for all IP interfaces on the
Switch.
metric <value 1-31>
−
Allows the assignment of a DVMRP route cost to
the above IP interface. A 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 is
1
.
probe <second 1-65535>
−
DVMRP defined an extension to IGMP that
allows routers to query other routers to determine if a DVMRP neighbor
is present on a given subnetwork or not. This is referred to as a ‘probe’.
This entry will set an intermittent probe (in seconds) on the device that
will transmit dvmrp messages, depending on the time specified. This
probe is also used to “keep alive” the connection between DVMRP
enabled devices. The default value is
10
seconds.
neighbor_timeout <second 1-65535>
−
The time period for which
DVMRP will hold Neighbor Router reports before issuing poison route
messages. The default value is
35
seconds.
