Samsung Ubigate iBG3026 Configuration Manual page 171

DVMRP Prune Information
The show ip dvmrp prune command displays DVMRP prune information for
Router_C. For example:
Router_C# show ip dvmrp prune
DVMRP Global State
The show ip dvmrp command displays the global DVMRP state for Router_C.
For example:
Router_C# show ip dvmrp
Internet Group Management Protocol (IGMP)
Internet Group Management Protocol(IGMP) is enabled on hosts and routers
that want to receive multicast traffic. IGMP informs locally-attached routers of
their multicast group memberships. Hosts inform routers of the groups of
which they are members by multicasting IGMP Group Membership Reports.
When multicast routers listen for these reports, they can exchange group
membership information with other multicast routers. This reporting system
allows distribution trees to be formed to deliver multicast datagrams.
The original version of IGMP was defined in RFC 1112, Host Extensions for
IP Multicasting. Extensions to IGMP, known as IGMP version 2.
IGMPv2 improves performance and supports the following message types:
1.
IGMP Query: IGMP Query is sent by the router to know which groups
have members on the attached network.
2.
IGMP Reports: IGMP reports are sent as a response to the query by hosts
to announce their group membership. Reports can be sent 'unsolicited'
when the hosts come up.
3.
IGMP Leaves: IGMP Leaves are sent by the host when it relinquishes
membership of a group.
IGMP Version 3 is not supported in this release.
© SAMSUNG Electronics Co., Ltd.
Ubigate iBG3026 Configuration Guide/Ed.00
133