Qtech QSW-3200-28T [45/136] Brief introduction of igmp snooping

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QTECH(config-if-ethernet-0/3)#gmrp

Caution: Enable global GMRP before enable GMRP on a port. By default, global GMRP

deisables and GMRP on a port can be enabled in trunk mode interface.

5.2.4 Display GMRP

 Use following command in any configuration mode to display global GMRP:

show gmrp

 Use following command in any configuration mode to display GMRP on a port:

show gmrp interface [ interface-list ]

Interface-list keyword is optional. If this keyword unspecified, the command displays GMRP

information for all the Ethernet ports. If specified, the command displays GMRP information on

specified Ethernet port.

For example:

! Display GMRP information of Ethernet 0/2 to ethernet 0/4 ethernet 2/1

QTECH(config)#show gmrp interface ethernet 0/2 to ethernet 0/4 ethernet 2/1

5.2.5 Add/delete multicast that can be dynamic learnt by GMRP

Add configured static multicast group to GMRP for other switches to dynamically learn.

garp permit multicast [ mac-address mac vlan vlan-id ]

Example:

Add 01:00:5e:00:01:01 vlan 1 to GMRP

QTECH(config)#garp permit multicast mac-address 01:00:5e:00:01:01 vlan 1

5.2.6 Display multicast that can be learnt by GMRP

Display multicast group can be statically learnt by GMRP.

show garp permit multicast

For example: Display multicast group that can be statically learnt by GMRP.

QTECH(config)#show garp permit multicast

5.3 IGMP Snooping Configuration

5.3.1 Brief introduction of IGMP Snooping

IGMP (Internet Group Manangement Protocol) is a part of IP protocol which is used to support

and manage the IP multicast between host and multicast router. IP multicast allows

transferring IP data to a host collection formed by multicast group. The relationship of multicast

group member is dynamic and host can dynamically add or exit this group to reduce network

load to the minimum to realize the effective data transmission in network.

IGMP Snooping is used to monitor monitor IGMP packet between host and routers. It can

dynamically create, maintain and delete multicast address table according to the adding and

leaving of the group members. At that time, multicast frame can transfer packet according to

his own multicast address table.

5.3.2 IGMP Snooping configuration

Use following command to control IGMP Snooping to establish the MAC address multicast

transmission table in layer 2.