IP Multicast Commands
ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
ExtremeWare XOS 11.5 Command Reference Guide
1830
disable igmp snooping
disable igmp snooping {forward-mcrouter-only | with-proxy | vlan <name>}
Description
Disables IGMP snooping.
Syntax Description
Default
IGMP snooping and the with-proxy option are enabled by default, but forward-mcrouter-only option is
disabled by default.
Usage Guidelines
If a VLAN is specified, IGMP snooping is disabled only on that VLAN, otherwise IGMP snooping is
disabled on all VLANs.
This command applies to both IGMPv2 and IGMPv3.
If the switch is in the
forward-mcrouter-only
mode, then the command
disable igmp snooping
forward-mcrouter-only
changes the mode so that all multicast traffic is forwarded to any IP router. If
not in the forward-mcrouter-mode, the command
disable igmp snooping forward-mcrouter-only
has no effect.
To change the snooping mode you must disable IP multicast forwarding. Use the command:
disable ipmcforwarding
The with-proxy option can be used for troubleshooting purpose. It should be enabled for normal
network operation.
Enabling the proxy allows the switch to suppress the duplicate join requests on a group to forward to
the connected Layer 3 switch. The proxy also suppresses unnecessary IGMP leave messages so that they
are forwarded only when the last member leaves the group.
Example
The following command disables IGMP snooping on the VLAN
accounting
:
disable igmp snooping accounting
forward-mcrouter-only
Specifies that the switch forwards all multicast traffic to the multicast router
only.
with-proxy
Disables the IGMP snooping proxy.
name
Specifies a VLAN.
