Introduction1-6GARP Switch OperationSome or all ports on the switch may be activated to operate under the GenericAttribute Registration Protocol (GARP) applications, GARP VLAN RegistrationProtocol (GVRP) and/or GARP Multicast Registration Protocol (GMRP).GARP is a protocol, or set of rules, that outlines a mechanism for propagating theport state and/or user information throughout a bridged LAN to keep track ofusers and VLANs on the network fabric. MAC bridges and end users alike cantake part in the registration and de-registration of GARP attributes such as VLANand multicast group membership.Management Information Base (MIB) SupportThe 9H531-18 and 9H532-18 modules provides MIB support including:• RMON (RFC 1271)• IETF MIB II (RFC 1573)• IETF Bridge MIB (RFC 1493)and a host of other Cabletron Enterprise MIBs.LANVIEW LEDsThe 9H531-18 and 9H532-18 module uses LANVIEW – the Cabletron Systemsbuilt-in visual diagnostic and status monitoring system. With LANVIEW LEDs,you can quickly identify, at-a-glance, system status as well as the device, port, andphysical layer status. Two LEDs indicate the transmission and reception of datafrom the INB SmartSwitch 9000 backplane connection. Each of the 18 Ethernetfront panel ports features two LEDs per port to indicate the port’s Administrativestatus (enabled/ disabled), LINK status (Link/Nolink), and Data Activity(receiving and transmitting data).Year 2000 ComplianceThe 9H531-18 and 9H532-18 module and the SmartSwitch 9000 chassis have aninternal clock that can maintain the time and date beyond the year 1999.For a complete list of supported MIBs, refer to the release notes provided with the9H531-18 and 9H532-18.NOTE