Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring Multicast Layer 2 (Rev. 03)
IGMP Snooping
© 2008 Foundry Networks, Inc.
Page 11 of 43
Command
Description
ip igmp snooping vlan
static
Configures a host or physical interface statically to join a
multicast group.
ip igmp snooping vlan
immediate-leave
Enables IGMP Immediate Leave Processing on the VLAN.
ip igmp snooping vlan
interface max-groups
Sets the maximum IGMP groups that the interface can join.
ip igmp snooping for-all
Adds the specified ports to all the existing multicast groups
and to all the multicast groups that will be created.
ip igmp snooping forbidden
Forbids forwarding of the entire multicast traffic via the
specified ports.
ip igmp snooping router-
timers
Enables the user to configure the query packet intervals
sent to the host port when performing
leave
snooping.
ip igmp snooping query-
source-ip-zero
Enables generating queries (on Leave and on xSTP
change) with source IP address that is all zeros (i.e.
0.0.0.0) according to the
draft-ietf-magma-snoop-11.txt
draft.
Enabling/Disabling IGMP Snooping
The
ip igmp snooping
command, in Global Configuration mode, enables IGMP Snooping on all
existing VLANs. The
no
form of this command disables IGMP Snooping on all existing VLAN
interfaces.
When the user enables IGMP Snooping, the device automatically learns the interfaces to which
multicast routers are connected. When the user disables IGMP Snooping, the entire configuration
is erased.
By default, IGMP Snooping is disabled. When IGMP Snooping is globally enabled or disabled, it
is also enabled or disabled on all existing VLANs. When IGMP Snooping is enabled, it is enabled
by default on all VLANs, but can be enabled or disabled on a per-VLAN basis.
NOTE
When IGMP Snooping is enabled, all multicast data packets are filtered out before
receiving reports, except for well known multicast groups in the range
01:00:5E:00:00:00 - 01:00:5E:00:06:FF.
Command Syntax
device-name
(config)#
ip igmp snooping
device-name
(config)#
no ip igmp snooping
Enabling/Disabling IGMP Snooping on a VLAN
The
ip igmp snooping vlan
command, in Global Configuration mode, enables IGMP Snooping on
the specified VLAN. To remove IGMP Snooping from a VLAN, use the
no
form of this command.
By default, if IGMP Snooping is enabled it is enabled on all the VLANs.