UMN:CLI
User Manual
V8102
482
show ip igmp join-group list
Global
1-99: IP standard access list
1300-1999: IP standard access list (extended range)
WORD: access list name
VLAN_NAME: VLAN name
show ip igmp join-group list
{<1-
99> | <1300-1999> | WORD} [
vlan
VLAN_NAME
]
If you do not specify the
reporter
option, the IP address configured on the VLAN is used
as the source address of the membership report by default. If no IP address is configured
on the VLAN, 0.0.0.0 is then used.
This feature only supports an IGMPv2 host; it does not support IGMPv3 host.
10.1.2.2
IGMP Access Control
Multicast routers send membership query messages to determine which multicast groups
have members in the attached local networks of the router. If hosts respond to the queries,
the routers then forward all packets addressed to the multicast group to these group
members. You can restrict hosts on a network to join multicast groups on the specified
access list.
To control an access to multicast groups on an interface, use the following command.
Command
Mode
Description
ip igmp access-group
{<1-99> |
WORD
}
Interface
[VLAN]
Enables an IGMP access control on an interface.
1-99: IP standard access list
WORD: access list name
no ip igmp access-group
Disables a configured IGMP access control.
10.1.2.3
IGMP Querier Configuration
An IGMP querier is the only router that sends membership query messages for a network
segment. In IGMP version 2, the querier is a router with the lowest IP address on the
subnet. If the router hears no queries for the timeout period, it becomes the querier.
IGMP Query Interval
The querier (a multicast router) sends general query messages periodically to discover
which multicast groups have members on the attached networks of the router.
To specify an interval to send general query messages, use the following command.
Command
Mode
Description
ip igmp query-interval
<1-18000>
Interface
[VLAN]
Specifies a general query interval.
1-18000: query interval (default: 125 seconds)
no ip igmp query-interval
Deletes a specified general query interval.
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