Lenovo Flex System Fabric CN4093 User Manual

150 CN4093 Application Guide for N/OS 8.4
Protocol-Based VLANs
Protocol‐basedVLANs(PVLANs)allowyoutosegmentnetworktrafficaccording
tothenetworkprotocolsinuse.Trafficforsupportednetworkprotocolscanbe
confinedtoaparticularport‐basedVLAN.Youcangivedifferentprioritylevelsto
trafficgeneratedbydifferentnetworkprotocols.
WithPVLAN,theswitchclassifiesincomingpackets
byEthernetprotocolofthe
packets,notbytheconfigurationoftheingressport.Whenanuntaggedor
priority‐taggedframe arrivesataningressport,theprotocolinformationcarriedin
theframeisused todetermineaVLANtowhichtheframebelongs.Ifaframe’s
protocolisnotrecognized
asapre‐definedPVLANtype,theingressport’sPVIDis
assignedtotheframe.Whenataggedframearrives,theVLANIDintheframe’s
tagisused.
EachVLANcancontainuptoeightdifferentPVLANs.Youcanconfigureseparate
PVLANsondifferentVLANs,witheachPVLANsegmentingtraffic
forthesame
protocoltype.Forexample,youcanconfigurePVLAN1onVLAN2tosegment
IPv4traffic,andPVLAN 8onVLAN100tosegmentIPv4traffic.
TodefineaPVLANonaVLAN,configureaPVLANnumber(1‐8)andspecifythe
frametypeandtheEthernettype
ofthePVLANprotocol.Youmustassignatleast
oneporttothePVLANbeforeitcanfunction.DefinethePVLANframetypeand
Ethernettypeasfollows:
 Frametype—consistsofoneofthefollowingvalues:
 Ether2(EthernetII)
 SNAP(SubnetworkAccessProtocol)
 LLC(LogicalLinkControl)
 Ethernettype—consistsofa4‐digit(16bit)hexvaluethatdefinestheEthernet
type.YoucanusecommonEthernetprotocolvalues,ordefineyourownvalues.
FollowingareexamplesofcommonEthernetprotocolvalues:
 IPv4=0800
 IPv6=86dd
 ARP=0806
Port-Based vs. Protocol-Based VLANs
EachVLANsupportsbothport‐basedandprotocol‐basedassociation,asfollows:
 ThedefaultVLANconfigurationisport‐based.Alldataportsaremembersof
VLAN1,withnoPVLANassociation.
 WhenyouaddportstoaPVLAN,theportsbecomemembersofboththe
port‐basedVLANandthePVLAN.Forexample,ifyouaddportEXT1to
PVLAN1onVLAN2,theportalsobecomesamemberofVLAN2.
 WhenyoudeleteaPVLAN,it’smemberportsremainmembersofthe
port‐basedVLAN.Forexample,ifyoudeletePVLAN1fromVLAN2,port
EXT1remainsamemberofVLAN2.
 WhenyoudeleteaportfromaVLAN,theportisdeletedfromallcorresponding
PVLANs.

Lenovo Flex System Fabric CN4093 Specifications

General

Brand	Lenovo
Model	Flex System Fabric CN4093
Category	Switch
Language	English