3 Configuring the Switch

is determined by the IGMP Query Report Delay (see “Configuring IGMP Snooping and Query Parameters” on page 3-213).

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.

Immediate leave is only effective if IGMP snooping is enabled, and IGMPv2 or IGMPv3 snooping is used.

Command Attributes

VLAN ID – VLAN Identifier. (Range: 1-4093).

Immediate Leave – Sets the status for immediate leave on the specified VLAN. (Default: Disabled)

Web – Click IGMP Snooping, IGMP Immediate Leave. Select the VLAN interface to configure, set the status for immediate leave, and click Apply.

Figure 3-131 IGMP Immediate Leave

CLI – This example enables IGMP immediate leave for VLAN 1 and then displays the current IGMP snooping status.

Console(config)#interface

vlan 1

 

 

Console(config-if)#ip igmp snooping immediate-leave

4-290

Console(config-if)#end

 

 

 

 

Console#show ip igmp snooping

 

 

4-289

Service Status:

Enabled

 

 

Querier Status:

Disabled

 

 

Leave proxy status:

Enabled

 

 

Query Count:

2

sec

 

 

Query Interval:

125

 

 

Query Max Response Time:

10 sec

 

 

Router Port Expire Time:

300

sec

1,

 

Immediate Leave Processing: Enabled on VLAN

 

IGMP Snooping Version:

Version 2

 

 

Console#

 

 

 

 

Displaying Interfaces Attached to a Multicast Router

Multicast routers that are attached to ports on the switch use information obtained from IGMP, along with a multicast routing protocol such as DVMRP or PIM, to

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Accton Technology ES3528M-SFP manual Displaying Interfaces Attached to a Multicast Router, 290