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DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch CLI Manual
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DVMRP COMMANDS
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.
state [enable | disable]
−
Allows DVMRP to be enabled or disabled.
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