Zte ZXR10 5900E Series User Manual

ZXR105900ESeriesUserManual(EthernetSwitchingVolume)
BPDUProtection
BPDUOverview
Switchescalculatingspanningtreeaccordingtothecontentof
BPDUpacket.Networktopologyoncechangesspanningtreewill
becalculatedagain.Ifthenetworkislarge,thecalculationwillbe
veryfrequent.Thisinuenceswitchestotransmitpacket.Atthe
sametime,thechangeofRootBridgealsobringssomeproblem.
BPDUprotectionovercomestheseproblems.
BPDUProtection
ofEdgePort
Ifaportissetasanedgeport,BPDUprotectionfunctionwillshut
downthisportwhentheedgeportreceivesaBPDUpacket.It
outputsalarminformationtomonitorterminal.
BPDUprotectionofedgeportmaintainsthestableofnetwork
topology.Devicewhichconnectstoedgeportcannotinuence
thespanning-tree.ItcanimplementbysettingportDOWNand
outputingalarminformationatterminalwhenreceivingBPDU
packetattheedgeport.TheexampleisshownasFigure7.
FIGURE7BPDUPROTECTIONOFEDGEPORT
Seetherststatusinthegure,priorityofswitchAis8192.
SwitchAisarootswitch.PriorityofswitchBis16384.Linkbe-
tweenSwitchAandSwitchBis1000Mandotherlinkis100M.
SwitchAandSwitchBarebothcoreswitches.SwitchCisaedge
switch.PortofswitchCconnectstoswitchDedgeport.spanning
treeisenabledinswitchesexceptswitchD.Afterswitchescalcu-
latespanningtreetheportofswitchCwhichconnectstoswitchB
isblocked.SwitchDdoesn’ttakepartincalculatingspanning-tree.
DirectionofarrowrepresentsthedirectionofBPDU.
Seethesecondstatusinthegure,spanningtreeisenabledin
switchD.ItspriorityissmallerthanswitchAwhichisrootswitch.
SwitchDwillbecomearootswitch.Afterswitchescalculatespan-
ningtree,portofswitchBwhichconnectstoswitchAwillbe
blocked.ItspriorityissmallerthanswitchAwhichisrootswitch.
SwitchDwillbecomearootswitch.Afterswitchescalculatespan-
ningtree,portofswitchBwhichconnectstoswitchAwillbe
blocked.
IfcongurationofBPDUprotectioninedgeportofswitchCtakes
place.SwitchDsendsBPDUpacket,switchCwillreceivethis
40CondentialandProprietaryInformationofZTECORPORATION

Zte ZXR10 5900E Series Specifications

General

Series	ZXR10 5900E
Operating Temperature	0°C to 45°C
Storage Temperature	-40°C to 70°C
Relative Humidity	5% to 95% (non-condensing)
VLAN	4K VLAN
Routing Protocols	RIP, OSPF, IS-IS, BGP
Security	802.1X, ACL
Power Supply	AC/DC