132GVRP configurationThe Generic Attribute Registration Protocol (GARP) provides a generic framework for devices in abridged LAN, such as end stations and switches, to register and deregister attribute values. The GARPVLAN Registration Protocol (GVRP) is a GARP application that registers and deregisters VLAN attributes.GVRP is based on the operating mechanism of GARP to maintain and propagate dynamic VLANregistration information for the GVRP devices on the network.This chapter includes these sections:• Introduction to GVRP• GVRP configuration task list• Configuring GVRP functions• Configuring GARP timers• Displaying and maintaining GVRP• GVRP configuration examplesIntroduction to GVRPGARPGARP provides a mechanism that allows participants in a GARP application to distribute, propagate,and register with other participants in a LAN the attributes specific to the GARP application, such as theVLAN or multicast address attributes.How GARP worksEach port that participates in a GARP application (GVRP for example) is a GARP participant.Through the GARP mechanism, the attribute information of GARP participants is rapidly propagatedacross the entire LAN. As shown in Figure 39, a GARP participant registers and deregisters its attributeinformation with other GARP participants by sending and withdrawing declarations, and registers andderegisters the attribute information of other participants according to the declarations and withdrawalsit receives.Figure 39 How GARP worksFor example, GVRP registers and deregisters VLAN attributes in the following cases.Device A Device BDeclarationDe-registerRegisterDeclaration withdrawal
