20.
IGMP Snooping
MN700004 Rev 01
248
Argument Description
PORT-LIST
Port list, of the form u[[/s[/p]]][-u[[/s[/p]]][,u[[/s[/p]]]]]...
Where u, s and p represent a 1- or 2-digit unit number, slot number and port number
respectively. You can specify:
•
u for all ports on unit number u;
•
u/s for all ports on slot number s on unit u;
•
u/s/p for port p on slot s on unit u;
•
a hyphenated range (blank spaces are not allowed);
•
a list, separated by commas (blank spaces are not allowed).
Example
device-name
(config)#
ip igmp snooping for-all 1/1/1-1/1/5
ip igmp snooping forbidden
The
ip igmp snooping forbidden
command, in Global Configuration mode, forbids
forwarding of the entire multicast traffic via the specified port list. By default, the command
is disabled. To remove the port list, use the
no
form of this command.
Command Syntax
device-name
(config)#
ip igmp snooping forbidden
PORT-LIST
device-name
(config)#
no ip igmp snooping forbidden
PORT-LIST
Argument Description
PORT-LIST
Port list, of the form u[[/s[/p]]][-u[[/s[/p]]][,u[[/s[/p]]]]]...
Where u, s and p represent a 1- or 2-digit unit number, slot number and port number
respectively. You can specify:
•
u for all ports on unit number u;
•
u/s for all ports on slot number s on unit u;
•
u/s/p for port p on slot s on unit u;
•
a hyphenated range (blank spaces are not allowed);
•
a list, separated by commas (blank spaces are not allowed).
Example
device-name
(config)#
ip igmp snooping forbidden 1/1/1-1/1/5
ip igmp snooping router-timers
The
ip igmp snooping router-timers
command, in Global Configuration mode, enables you
to configure the query packet intervals sent to the host port when performing
leave
snooping.
The command sets the Multicast router timer variables (described in RFC 2236) to
synchronize the IGMP snooping.
By default – when the switch receives a leave packet from a host that is a member of a certain
group, it perform the following: