Zte ZXR10 T600

ZXR10T600/T1200UserManual(IPv6Volume)
Accordingtodesign,RIPv1andRIPv2toadapttobothTCP/IP
suiteandothernetworkprotocolsuites.Therefore,routing
tableentriesofapacketcontainnetworkprotocolsuiteeld.
However ,itisseldomusedforothernon-IPnetworksin
practice.Therefore,supporttothisfunctionisremovedfrom
RIPng.
�NextHop
ThereisnoinformationaboutnexthopinRIPv1.Therouterat
thereceivingendtakesthesourceaddressofapacketasthe
nexthopfortheroutetothedestinationnetwork.RIPv2con-
tainsexplicitinformationaboutthenexthop,thusfacilitating
selectionoftheoptimumrouteandavoidingroutingloopand
slowconvergence.
DifferentfromRIPv1andRIPv2,thenexthopeldinRIPng
existsasaseparateRTEtoavoidoverlongRoutingtableEntry
(RTE)andtoimproveefciencyinrouteinformationtransmis-
sion.
�PacketLength
BothRIPv1andRIPv2setlimittothelengthofapacket,pro-
visioningthateachpacketcanonlycarryatmost25RTEs.
However ,RIPnghasnolimittothelengthofapacketandthe
numberofRTEs.ThelengthofapacketdependsontheMaxi-
mumTransmissionUnit(MTU)ofamedium.Processingonthe
packetlengthbyRIPngenablesnetworkstoimproveefciency
inrouteinformationtransmission.
�SecurityConsideration
RIPv1packetscontainnoauthenticationinformationwhichre-
sultsininsecurity.Anyhostthatsendspacketsthroughthe
UDPPort520willberegardedasarouterbyitsneighborhost,
whichislikelytocauserouterspoong.RIPv2isdesignedto
containauthenticationpacketstoenhancesecurity.Although
routersthatexchangerouteswitheachothercannotreceive
routeinformationfromeachotherbeforeauthentication,RIPv2
doesnothaveadequatesecurity.
IPv6containsperfectsecuritypolicies,sothereisnoneedto
designseparatesecurityauthenticationpacketforRIPngany
morebuttouseIPv6securitypolicies.
�PacketTransmissionMode
RIPv1sendsrouteinformationthroughbroadcast.Inthisway,
bothroutersandallthehostswithinthesameLANcanreceive
packets,whichisunnecessaryandinsecure.
However ,bothRIPv2andRIPngcansendpacketseither
throughbroadcastorthroughmulticast.Inthisway,packets
canbesentthroughmulticastinnetworksthatsupportmul-
ticast,thusgreatlyreducingthequantityofrouteinformation
thatistransmittedinnetworks.
28CondentialandProprietaryInformationofZTECORPORATION