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Enterasys b5 User Manual

Enterasys b5
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Configuring Link Layer Discovery Protocol and LLDP-MED
Enterasys B5 CLI Reference 6-13
Examples
ThisexampleshowshowtoclearalltheCiscoDPparametersbacktothedefaultsettings.
B5(rw)->clear ciscodp
ThisexampleshowshowtocleartheCiscoDPstatusonportge.1.5.
B5(rw)->clear ciscodp port status ge.1.5
Configuring Link Layer Discovery Protocol and LLDP-MED
Overview
TheLinkLayerDiscoveryProtocol(LLPD)providesanindustrystandard,vendorneutralwayto
allownetworkdevicestoadvertisetheiridentitiesandcapabilitiesonalocalareanetwork,andto
discoverthatinformationabouttheirneighbors.
LLDPMEDisanenhancementtoLLDPthatprovidesthefollowingbenefits:
•AutodiscoveryofLAN
policies,suchasVLANid,802.1ppriority,andDiffServcodepoint
settings,leadingto“plugandplay”networking
•Devicelocationandtopologydiscovery,allowingcreationoflocationdatabasesand,inthe
caseofVoIP ,provisionofE911services
•Extendedanda utoma tedpowermanagementofPoweroverEthernetendpoints
•Inventorymanagement,allowingnetworkadministrators
totracktheirnetworkdevicesand
todeterminetheircharacteristics,suchasmanufacturer,softwareandhardwareversions,and
serialorassetnumbers
TheinformationsentbyanLLDPenableddeviceisextractedandtabulatedbyitspeers.The
communicationcanbedonewheninformationchangesoronaperiodicbasis.The
information
tabulatedisagedtoensurethatitiskeptuptodate.Portscanbeconfiguredtosendthis
information,receivethisinformation,orbothsendandreceive.
EitherLLDPorLLDPMED,butnotboth,canbeusedonaninterfacebetweentwodevices.A
switchportusesLLDP
MEDwhenitdetectsthatanLLDPMEDcapabledeviceisconnectedtoit.
LLDPinformationiscontainedwithinaLinkLayerDiscoveryProtocolDataUnit(LLDPDU)sent
inasingle8 02.3Ethernetframe.TheinformationfieldsinLLDPDUareasequenceofshort,
variablelength,informationelementsknownasTLVs
type,length,andvaluefieldswhere:
•Typeidentifieswhatkindofinformationisbeingsent
•Lengthindicates thelengthoftheinformation stringinoctets
•Valueistheactualinformationthatneedstobesent
TheLLDPstandardspecifiesthatcertainTLVs aremandatoryintransmittedLLDPDUs,while
othersareoptional.
YoucanconfigureonaportspecificbasiswhichoptionalLLDPandLLDP
MEDTLVsshouldbesentinLLDPDUs.
Configuration Tasks
Thecommandsincludedinthisimplementationallowyoutoperformthefollowingconfiguration
tasks:

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Enterasys b5 Specifications

General IconGeneral
BrandEnterasys
Modelb5
CategoryOther
LanguageEnglish