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GMRP allows network devices to register end stations with multicast groups. GMRP requires that

any participating network devices or end stations comply with the IEEE 802.1p standard.

Group Attribute Registration Protocol (GARP)

See Generic Attribute Registration Protocol.

IEEE 802.1D

Specifies a general method for the operation of MAC bridges, including the Spanning Tree

Protocol.

IEEE 802.1Q

VLAN Tagging—Defines Ethernet frame tags which carry VLAN information. It allows switches to

assign endstations to different virtual LANs, and defines a standard way for VLANs to

communicate across switched networks.

IEEE 802.1p

An IEEE standard for providing quality of service (QoS) in Ethernet networks. The standard uses

packet tags that define up to eight traffic classes and allows switches to transmit packets based on

the tagged priority value.

IEEE 802.1X

Port Authentication controls access to the switch ports by requiring users to first enter a user ID

and password for authentication.

IEEE 802.3ac

Defines frame extensions for VLAN tagging.

IEEE 802.3x

Defines Ethernet frame start/stop requests and timers used for flow control on full-duplex links.

(Now incorporated in IEEE 802.3-2002)

Internet Group Management Protocol (IGMP)

A protocol through which hosts can register with their local router for multicast services. If there is

more than one multicast switch/router on a given subnetwork, one of the devices is made the

“querier” and assumes responsibility for keeping track of group membership.

IGMP Snooping

Listening to IGMP Query and IGMP Report packets transferred between IP Multicast Routers and

IP Multicast host groups to identify IP Multicast group members.

IGMP Query

On each subnetwork, one IGMP-capable device will act as the querier — that is, the device that

asks all hosts to report on the IP multicast groups they wish to join or to which they already belong.

The elected querier will be the device with the lowest IP address in the subnetwork.

IP Multicast Filtering

It is a

feature to allow or deny the Client to add the specified multicast group.

Multicast Switching

A process whereby the switch filters incoming multicast frames for services which no attached

host has registered, or forwards them to all ports contained within the designated multicast group.

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