Multicast; Table 11: Igmp Snooping - Allied Telesis IS230-10GP Reference Manual

Chapter 2: Layer 2 Features

Multicast

Function
show ip igmp snooping User EXEC
show ip igmp snooping
router
show ip igmp snooping
groups [(dynamic |
static)]
show ip igmp snooping
vlan [VLAN-LIST]
show ip igmp snooping
groups counters
show ip igmp snooping
querier
30
Multicast forwarding allows a single packet to be forwarded to multiple
destinations. The service is based on L2 switch receiving a single packet
addressed to a specific Multicast address. Multicast forwarding creates
copies of the packet, and transmits the packets to the relevant ports.
This section contains the following features:
"IGMP Snooping"

"MLD Snooping" on page 35

IGMP Snooping
IGMP Snooping is defined as the process of listening to Internet Group
Management Protocol (IGMP) network traffic. IGMP Snooping allows a
network switch to listen in on the IGMP conversation between hosts and
routers and maintain a map of which links need which IP multicast
streams. Multicasts can be filtered from the links which do not need them
in turn controlling which ports receive specific multicast traffic.
Table 11. IGMP Snooping
Privilege
This command will
display IP IGMP
snooping global info.
User EXEC This command will
display the IP IGMP
router info.
User EXEC This command will
display the IP IGMP
groups for dynamic or
static or all types.
User EXEC This command will
display IP IGMP
snooping VLAN info.
User EXEC This command will
display the IP IGMP
group counter include
static group.
User EXEC This command will
display all of the static
VLAN IP IGMP querier
info.
Description
switch# show ip igmp
snooping
switch# show ip igmp
snooping router
switch# show ip igmp
snooping groups
switch# show ip igmp
snooping groups dynamic
switch# show ip igmp
snooping groups static
switch# show ip igmp
snooping vlan
switch# show ip igmp
snooping counters
switch# show ip igmp
snooping querier
Example