Lenovo Flex System Fabric CN4093 User Manual

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Appendix A. Glossary
DIP
ThedestinationIPaddressofaframe.
Dport
Thedestinationport(applicationsocket:forexample,
http‐80/https‐443/DNS‐53)
HBA
HostBusAdapter.Anadapterorcardthatinterfaceswithdevicedriversin
thehostoperatingsystemandthestoragetargetinaStorageAreaNetwork
(SAN).ItisequivalenttoaNetworkInterfaceController(NIC)fromaLocal
AreaNetwork(LAN).
NAT
NetworkAddressTranslation.AnytimeanIPaddressischangedfromone
sourceIPordestinationIPaddresstoanotheraddress,networkaddress
translationcanbesaidtohavetakenplace.Ingeneral,halfNATiswhenthe
destinationIPorsourceIPaddressischangedfromoneaddresstoanother.

FullNATiswhenbothaddressesarechangedfromoneaddresstoanother.
NoNATiswhenneithersourcenordestinationIPaddressesaretranslated.
Preemption
InVRRP,preemptionwillcauseaVirtualRouterthathasalowerprioritytogo
intobackupshouldapeerVirtualRouterstartadvertisingwithahigher
priority.
Priority
InVRRP,thevaluegiventoaVirtualRoutertodetermineitsrankingwithits
peer(s).Minimumvalueis1andmaximumvalueis254.Defaultis100.A
highernumberwillwinoutformasterdesignation.
Proto (Protocol)
Theprotocolofaframe.Canbeanyvaluerepresentedbya8‐bitvalueinthe
IPheaderadherenttotheIPspecification(forexample,TCP,UDP,OSPF,
ICMP,andsoon.)
SIP
ThesourceIPaddressofaframe.
SPort
Thesourceport(applicationsocket:forexample,
HTTP‐80/HTTPS‐443/DNS‐53).
Tracking
InVRRP,amethodtoincreasethepriorityofavirtualrouterandthusmaster
designation(withpreemptionenabled).Trackingcanbeveryvaluableinan
active/activeconfiguration.
Youcantrackthefollowing:
 ActiveIPinterfacesontheWebswitch(incrementspriorityby2foreach)
 ActiveportsonthesameVLAN(incrementspriorityby2foreach)
 Numberofvirtualroutersinmastermodeontheswitch
VIR
VirtualInterfaceRouter.AVRRPaddressisanIPinterfaceaddressshared
betweentwoormorevirtualrouters.
Virtual Router
AsharedaddressbetweentwodevicesutilizingVRRP,asdefinedinRFC
2338.OnevirtualrouterisassociatedwithanIPinterface.ThisisoneoftheIP
interfacesthattheswitchisassigned.AllIPinterfacesontheCN4093smustbe
inaVLAN.Ifthereismorethanone
VLANdefinedontheWebswitch,then
theVRRPbroadcastswillonlybesentoutontheVLANofwhichthe
associatedIPinterfaceisamember.

Lenovo Flex System Fabric CN4093 Specifications

General

Brand	Lenovo
Model	Flex System Fabric CN4093
Category	Switch
Language	English