3Com 3500 - Manual (Page 507)

ip multicast dvmrp interface mode 507
ip multicast dvmrp
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interface mode
For CoreBuilder 9000: Applies to Layer 3 switching modules only.
Enables or disables the Distance-Vector Multicast Routing Protocol
(DVMRP) per routing interface. This protocol facilitates router-to-router
communication for building source-rooted spanning trees that deliver IP
multicast traffic to IP multicast group members.
Valid Minimum Abbreviation
ip m d i m
Important Considerations
■
When DVMRP is enabled on an interface, the interface is configured
with the default value of 1 for the metric, which you can modify at
any time. See “ip multicast dvmrp interface metric” later in this
chapter.
■
If DVMRP is enabled on any interface, IGMP snooping should also be
enabled in the system. See “ip multicast igmp snooping” later in this
chapter.
■
If DVMRP is disabled, the interface cannot participate in building
spanning trees for IP multicast. However, as long as IGMP snooping is
enabled, the interface forwards appropriate IP multicast traffic to
downstream group members. If IGMP snooping is disabled, then the
interface only forwards IP multicast traffic with addresses in the
reserved range.
Options
Prompt Description Possible Values [Default]
IP interface Index number of the interface
for which you want to enable
or disable DVMRP
■
A valid IP
interface index
number
■
all
■
? (for a list of
selectable
indexes)
–
DVMRP
mode Whether DVMRP mode is
enabled or disabled
■
enabled
■
disabled
disabled (factory
default), or
current value