Ip Igmp Snooping Vlan Immediate-Leave - Supermicro SSE-G2252 User Manual

ip igmp snooping vlan immediate-leave

This command immediately deletes a member port of a multicast service if a leave
packet is received at that port and immediate-leave is enabled for the parent VLAN. Use
the no form to restore the default.
Syntax
[no] ip igmp snooping vlan vlan-id immediate-leave
vlan-id - VLAN ID (Range: 1-4093)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• If immediate-leave is not used, a multicast router (or querier) will send a
group-specific query message when an IGMPv2/v3 group leave message is
received. The router/querier stops forwarding traffic for that group only if no host
replies to the query within the time out period. (The time out for this release is
currently defined by Last Member Query Interval (fixed at one second) * Robustness
Variable (fixed at 2) as defined in RFC 2236.
• If immediate-leave is enabled, the switch assumes that only one host is connected
to the interface. Therefore, immediate leave should only be enabled on an interface
if it is connected to only one IGMP-enabled device, either a service host or a
neighbor running IGMP snooping.
• This command is only effective if IGMP snooping is enabled, and IGMPv2 or
IGMPv3 snooping is used.
Example
The following shows how to enable immediate leave.
SSE-G2252(config)#ip igmp snooping vlan 1 immediate-leave
SSE-G2252(config)#
Chapter 38: Multicast Filtering Commands
38-15