網(wǎng)絡(luò)技術(shù)培訓(xùn)-EIGRP技術(shù)原理與配置

1、EIGRP技術(shù)原理與配置網(wǎng)絡(luò)技術(shù)基礎(chǔ)培訓(xùn)材料EIGRP 特性組播和單播替代廣播支持VLSM和不連續(xù)子網(wǎng)在任何一個(gè)節(jié)點(diǎn)可以進(jìn)行手動(dòng)匯總支持多種網(wǎng)絡(luò)層協(xié)議支持等代價(jià)和非等代價(jià)負(fù)載均衡高級(jí)距離矢量快速收斂配置簡(jiǎn)單增量更新100%無環(huán)的無類路由協(xié)議初始路由發(fā)現(xiàn)鄰居建立可以讓兩者在確定對(duì)方的身份之后再進(jìn)行更深入的交流。EIGRP MetricEIGRP 計(jì)算 metric 的標(biāo)準(zhǔn)選項(xiàng) :BandwidthDelayEIGRP 計(jì)算 metric的可選項(xiàng):ReliabilityLoadEIGRP的三張表DUAL TerminologySelects lowest-cost, loop-free paths

2、 to each destinationAD = cost between the next-hop router and the destination FD = cost from local router = AD of next-hop router + cost between the local router and the next-hop router Lowest-cost = lowest FDR1R3R210.10.0.0（20）（10）（10）（10）FD=20AD=10DUAL Terminology(Current) successor = next-hop rou

3、ter with lowest-cost, loop free pathFeasible successor = backup router with loop-free path (AD of feasible successor must be less than FD of current successor route)R1R3R210.10.0.0（20）（10）（10）（10）FD=30AD=20R5R4（20）（10）AD=30Network X Next Hop: BMetric : 9Network X Metric : 14Network X Metric : 8Netwo

4、rk X Metric : 5FD=9A or C = Feasible Successor ? FC = AD FDFD = 5 + 4 = 9AD(A) = 8 A = Feasible SuccessorAD(C) = 14 C Feasible SuccessorSuccessorNetwork XMetric : 4Metric : 6Metric : 5AD=14AD = 8DUAL TerminologyEIGRP 路徑計(jì)算（路由器 C）Router C Tables:配置 EIGRP指定本機(jī)上哪些接口能夠參與EIRGP進(jìn)程使用主類通告 Network 10.0.0.0表示只要一

5、個(gè)接口的IP屬于10.0.0.0這個(gè)主類網(wǎng)絡(luò)，就可以參與EIGRP的進(jìn)程。使用通配符掩碼EIGRP的標(biāo)準(zhǔn)通告方式是：network 接口網(wǎng)絡(luò)地址 接口反掩碼（0和1置換過的掩碼）Network 172.16.3.0 0.0.0.255 表示只要一個(gè)接口IP的前24bit和172.16.3.0的前24bit一一匹配就可以參與EIGRP進(jìn)程，這里的方法并不唯一驗(yàn)證 EIGRP: show ip eigrp neighborsRouterX# show ip eigrp neighborsIP-EIGRP Neighbors for process 77Address Interface Holdt

6、ime Uptime Q Seq SRTT RTO (secs) (h:m:s) Count Num (ms) (ms)172.16.81.28 Ethernet1 13 0:00:41 0 11 4 20172.16.80.28 Ethernet0 14 0:02:01 0 10 12 24172.16.80.31 Ethernet0 12 0:02:02 0 4 5 20驗(yàn)證 EIGRP: show ip route eigrp驗(yàn)證 EIGRP: show ip protocols驗(yàn)證 EIGRP: show ip eigrp topologyRouterX# show ip eigrp

7、topologyIP-EIGRP Topology Table for process 77Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - Reply statusP 172.16.90.0 255.255.255.0, 2 successors, FD is 46251776 via 172.16.80.28 (46251776/46226176), Ethernet0 via 172.16.81.28 (46251776/46226176), Ethernet1P 172.16.81.0 255.2

8、55.255.0, 2 successors, FD is 307200 via Connected, Ethernet1 via 172.16.81.28 (307200/281600), Ethernet1 via 172.16.80.28 (307200/281600), Ethernet0 RouterX# debug ip eigrpIP-EIGRP: Processing incoming UPDATE packetIP-EIGRP: Ext 192.168.3.0 255.255.255.0 M 386560 - 256000 130560 SM 360960 256000 10

9、4960IP-EIGRP: Ext 192.168.0.0 255.255.255.0 M 386560 - 256000 130560 SM 360960 256000 104960IP-EIGRP: Ext 192.168.3.0 255.255.255.0 M 386560 - 256000 130560 SM 360960 256000 104960IP-EIGRP: 172.69.43.0 255.255.255.0, - do advertise out Ethernet0/1IP-EIGRP: Ext 172.69.43.0 255.255.255.0 metric 371200

10、 - 256000 115200IP-EIGRP: 192.135.246.0 255.255.255.0, - do advertise out Ethernet0/1IP-EIGRP: Ext 192.135.246.0 255.255.255.0 metric 46310656 - 45714176 596480IP-EIGRP: 172.69.40.0 255.255.255.0, - do advertise out Ethernet0/1IP-EIGRP: Ext 172.69.40.0 255.255.255.0 metric 2272256 - 1657856 614400IP

11、-EIGRP: 192.135.245.0 255.255.255.0, - do advertise out Ethernet0/1IP-EIGRP: Ext 192.135.245.0 255.255.255.0 metric 40622080 - 40000000 622080IP-EIGRP: 192.135.244.0 255.255.255.0, - do advertise out Ethernet0/1debug ip eigrpNote: EIGRP routes are exchanged only when a change in topology occurs.EIGRP 和不連續(xù)子網(wǎng)默認(rèn)情況下，EIGRP在網(wǎng)絡(luò)邊界執(zhí)行匯總，無法支持不連續(xù)子網(wǎng)。no auto-summary解決不連續(xù)子網(wǎng)通過no auto-summary命令關(guān)閉網(wǎng)絡(luò)邊