BO CO MN HCMNG NNG CAO TI: GIAO THC NH TUYN NNG CAOV IPv6I HC NNGTR!NG I HC BCH "HOA"HOA CNG NGH# THNG TINNGUY$N V%N TINV& TH TH'O()P "HMT * "+, Nng, 08/2015Ni dung bo coIP Routing1IP Multicast2CacheCast 3AODV cho m ng MANET 4IP RoutingIPv4 v IPv! "#DN v O$en%lo&!IP RoutingP Routing l qu trnh Router thc hin chuyn mt gi tin t mt ja chi ngun n mt ja chi ch trong mang.Static Routejnhtuyntnhlqutrnhjnhtuyn m thc hin phi cu hnh bng tay tng ja chi ch cu th cho Router.K thut ny on gin, d thc hin.thaotntinguynmangvCPUx l trn router .Dynamic RouteCc router trao i thng tin jnh tuyn vinhau.T,mirouterthchin tnh ton xy dng bng jnh tuynVijnhtuynng,ccrouterphi chayccgiaothcjnhtuyn(routing protocol).c im ca Dynamic RouteCpnhtvttcccung,chon ung tt nht t vo bng jnh tuyn vxoikhiungkhngsdung uoc na.Khi cu trc mang c bt ky thay i th routertngcpnhtlaibngjnh tuyn.Thigianccrouterngbvi nhau cng ngn cng tt.Thut ton nh tuyn c bnThuttonecto!"hongcch:dng thuttonBellman-Ford.Sdungchiph (haytrongs)chomimtlinktgia ccnodetrongmang.GithngtintA n B dng ung i c tng chi ph thp nht.Thut tonVector khong cchTrang thi kt niThut ton t!#ng thi "t n$i% dng thut ton Dijkstra. Xy dng cu trc d liu dang cy, vi node hin tai l gc,vchamoinodekhctrongmang.Cynysau phucvuxydngbngjnhtuyn,uarabuc truyn k tip tt uu,. t mt node n bt ky node khc trn mang.Ni dung bo coIP Routing1IP Multicast2CacheCast 3AODV cho m ng MANET 4IP MulticastIPv4 v IPv! "#DN v O$en%lo&!IP &u'tica(tP Multicast l cng ngh da trn nn tng P. Mtgitincthchiathnhnhiugitingi nnhiunguinhn.Ccntmangctrch nhim ti tao v chuyn tip ti ngui nhn.IP &u'tica(tMt ja chi P Multicast l mt ja chi P lp mang D trong pham vi t 224.0.0.0 n 239.255.255.255.Mt s ja chi dnh ring cho P Multicast:)iao th*c t!ong &u'tica(tGiao thc PIM (Protocol ndependent Multicast)Sdungthngtintbngjnhtuynunicastthchinqutrnhkimtra Reverse Path Forwarding (RPF) t ua ra quyt jnh gi d liu. PM c th cu hnh hoat ng theo hai co ch l dense mode v sparse modeGiao thc DVMRP (Distance Vector Multicast Routing Protocol) DVMRP lgiaothc jnh tuyn multicasttheo vector khong cch. Trong giao thc ny, b jnh tuyn nhn gi multicast s xc jnh cc mrouter uoc kt ni vincnnhnginyhaykhng.DVMRPgiginttcccbjnh tuyn uoc kt ni v oi tr li. B jnh tuyn c my khng l thnh vin ca nhmstrvmtthngip"xnbt,nhtrnhvicgiccthngtin tip theo cho b jnh tuyn ny.Giao thc MOSPF (Multicast Open Shortest Path First) MOSPFlgiaothcxcjnhungingnnht. BjnhtuynMOSPFxy dngbncamhnhmang,baogmvjtrccnt,ccungivxc jnh ung i tt nht n cc mrouter khc.Ni dung bo coIP Routing1IP Multicast2CacheCast 3AODV cho m ng MANET 4CacheCastIPv4 v IPv! "#DN v O$en%lo&!+ache+a(tSABCAPBCBPCPH thng CacheCast hoat ng trn tng lin kt vmuctiulloaibtruynticcdliudu tha trn cc lin kt., t-.ng ca +ache+a(t Gm 2 phn m rng:-Cc on vj qun l b nh m (Cache Management Unit - CMU): noi lin kt loai b d liu du tha truc khi vo lin kt.-Cc on vj luu tr b nh m (Cache Store Unit - CSU): noi ti cu trc cc gi tin truc khi buc vo Router khc./in" +ache+acheab'e Pac"et(Cc gi tin mang theo mt CacheCast header goi l cacheable packet. CacheCast chi lm vic cc gi cacheable.I0D12:mttrungqunlchocochbnh m, n tr n vj tr ca payload trong CSU.Pay'oa3ID:xcjnhgipayloadduynhttai ngun v khi uoc kt hop vi ja chi ngun, n tr thnh mt gi duy nht trn mang.+ ch ca /in" +achendex012ndex012Payload D000Payload ---A P1 xP1P1 A P1 04ng +&5 4ng +S5CMU CSUCache miss+ ch ca /in" +acheCache hitndex012ndex012Payload DP1P2P3Payload ---B P2 xP1B 1P2P3P24ng +&5 4ng +S5CMU CSU67ch th-8c b9 nh8 :mKhi nim v Packet TrainL thi gian b nh m cthgimtpayloadmang theo trong gi u tin cho n khiheadercuicngcamt packet train n.Ngui ta cho rng thi gian b nh m gi gi payload thch hop l 10ms.Ni dung bo coIP Routing1IP Multicast2CacheCast 3AODV cho m ng MANET 4AODV cho m ng MANET IPv4 v IPv! "#DN v O$en%lo&!)iao th*c nh tuyn ;