Chapter6 Enhanced IGRP(EIGRP) and Open Shortest Path First(OSPF)

EIGRP的1大特点是它可以支持几种网络层协议:IP, 持数种网络层协议的还有 Intermediate System-to-Intermediate System(IS-IS)协议,但是这个协 议只支持 IP和 Connectionless Network Service(CLNS).EIGRP通过 PDMs来支持不同的网络 EIGRP 的 PDM 保持 1 个单独的路由信息表来装载某种协议(比如 IP)的路由信 IP/EIGRP表,IPX/EIGRP的表和 AppleTalk/EIGRP表 | Chapter6 Enhanced IGRP EIGRP and Open Shortest Path First OSPF EIGRP Features and Operation EIGRP M 1 AA classless WWïÎÂft Éft ft IGRP ÄEIGRP Mffl AS GMft IGRP A WM eigrp ÈWÂÈm tmïHfcfiWOMMm ftWIWWtWAWÂilWÆ VLSM ft Wt W ftO É W HÄEmM TSiÄfäS i tt EW OSPF MPW ftMM WWïÎÂftSMB EIGRP -ft ft ft WWWft ftft4P router WHtimWä BftHftftft fä ft HftWHtiO 1 000 W EIGRP W WÆ 1 ftft lW WAWAftft 1. PDMs Protocol-Dependent Module AA IP IPX ft AppleTalk 2. WAW4P router W 3. MA ftWfttft Reliable Transport Protocol RTP Effift 4. M A MBffti Diffusing Update Algorithm DUAL fë fê Protocol-Dependent Module EIGRP W 1 W MEW ft IW ft IP IPX ft AppleTalk . EIGRP A t IW tfttftW W Intermediate System-to-Intermediate System IS-IS ftK fiM ftft iftHAt IP ft Connectionless Network Service CLNS .EIGRP M PDMs W 1 W EIGRP W PDM W 1 WWOMm W IP W ÉB SÄMW IP EIGRP IPX EIGRP WAft AppleTalk EIGRP A Neighbor Discovery ÆfefrT EIGRP W router E BMft E ftft ft neighbor . ft M Æ T 3 1. Hello BS ACK 2. AS EK 3. K Ä ft ft E Æ Hello B ÄftW E WÄfäS ttW M B T EIGRP W router A4B Mtë IJ Hellos ftMW 1 AS router iW éftWÉB W W ÄftW .W W MÆ STO W as ÉBSWft ft EIGRP WBWWHtWftmft ftM OJW router ft WW router B ftWftA ftftJBW Wft AW É F WWftéft lJW router. ft router WMB ft E fë ftAM AB TA fë 1MÎTïiS feasible distance Ifë BWÆW ÉWS 2. successor M- mÎWW router ffia MW BWMWê router TC glJBWM 3. W reported distance ffi4B router Wffi4B router BB M BWÆW ÉW 4. f feasible successor MÎf M router BWM ÆS router SWfc W ÉKOM router M œWffi iS bWÎTÏÎ Hwo m wmù Reliable Transport Protocol RTP EIGRP i W RTP W ît tSÆfflT EIGRP W router ZfflWM RTP W MB reliable BP WW .RTP EIGRP MWWWWfôWfè w . Ba Æfë æ w fëwa w .MW e IGRP WOCTBWWRTP OÆM router fsljEOfîWlWl MÈ ftTT- Îftt. fê 3Stl S ttWtSÔWW tSÔ i 6 oj wram rfâ M- W m b 1WO Diffusing Update Algorithm DUAL EIGRP Æ DUAL WWllJ ÎroWM fe router J 4B M W- 1 g W mm router OfêWW Wmtë router WMBW wa imiwwm mR TAÆ i. WMm 2. fë VLSM 3.