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NetEngine IAD User Guide
Multicast Configuration 186
Displaying
the IGMP
Group
IGMP is a communication protocol that operates between a router (The
IAD) and its local subnet (Ethernet-connection) hosts. The router sends
periodic IGMP query packets to the subnet to check for any hosts that
have joined or would like to join a group.
Type G to display the IGMP Group. The IAD displays all Internet Group
Management Group (IGMP) groups for each interface and their expiration
times.
IGMP Groups
Interface 10/100BaseT Ethernet:
224.0.0.1 (Default Local Join) Expires: NEVER
224.0.0.2 (Default Local Join) Expires: NEVER
224.0.0.13 (Default Local Join) Expires: NEVER
Press any key to continue.
Displaying
the IGMP
Querier
The IGMP Querier is the IGMP router that has the highest IP address
among the others. It sends periodic IGMP Query messages and handles
IGMP Membership Report and Leave messages.
Type Q to display the IGMP Querier. The IAD displays the IGMP Querier
for each interface and its expiration time:
IGMP Querier
Interface 10/100BaseT Ethernet:
140.242.59.65 (this interface)
Press any key to continue.
Displaying
the
Multicast
Routing
Table
Type M to display the Multicast Routing Table.
The IAD displays the following information:
( Source, Group )
( * , 230.253.84.168)Expires: 130s
Incoming interface: Null, RPF Neighbor 0.0.0.0
Outgoing interface list:
SDSL VPI/VCI 0*38
10/100BaseT Ethernet
(Source, Group)
( * , 237.152.172.93)Expires: 42s
Incoming interface: Null, RPF Neighbor 0.0.0.0
Outgoing interface list:
SDSL VPI/VCI 0*38