思科Eigrp split-horizon丟失路由分析
思科Eigrp split-horizon丟失路由分析
cisco公司已成為公認的全世界網絡互聯解決方案的領先廠商，該公司出產的一系列路由器更是引領世界，那么你知道思科Eigrp split-horizon丟失路由分析嗎?下面是學習啦小編整理的一些關于思科Eigrp split-horizon丟失路由分析的相關資料，供你參考。
思科Eigrp split-horizon丟失路由分析：
我們測試的網絡類型是幀中繼(HUB-SPOKE)，R1分別與R2和R3建立frame映射，R1為 hub端，2，3 分別為spoke端 。R2只與 R1建立映射,R3也只與R1建立映射。
R2-----R1------R3
配置幀中繼：
R1配置：
R1#conf t
R1(config)#int lo 0
R1(config-if)#ip add 1.1.1.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#int s0/0
R1(config-if)#ip add 11.1.1.1 255.255.255.0
R1(config-if)#encapsulation frame-relay
R1(config-if)#no arp frame-relay
R1(config-if)#no frame inverse-arp
R1(config-if)#frame map ip 11.1.1.2 102 broadcast
R1(config-if)#frame map ip 11.1.1.3 103 broadcast (幀中繼的標準配置)
R1(config-if)#no sh
R2配置：
R2(config-if)#int s0/0
R2(config-if)#ip add 11.1.1.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#encapsulation frame-relay
R2(config-if)#no arp frame-relay
R2(config-if)#no frame inverse-arp
R2(config-if)#frame map ip 11.1.1.1 201 broadcast
R2(config-if)#no sh
R3配置：
R3(config-if)#int s0/0
R3(config-if)#ip add 11.1.1.3 255.255.255.0
R3(config-if)#encapsulation frame-relay
R3(config-if)#no arp frame-relay
R3(config-if)#no frame inverse-arp
R3(config-if)#frame map ip 11.1.1.1 301 broadcast
R3(config-if)#no sh
查看幀中繼建立情況
R1#sh frame map
Serial0/0 (up): ip 11.1.1.2 dlci 102(0x66,0x1860), static,
broadcast,
CISCO, status defined, active
Serial0/0 (up): ip 11.1.1.3 dlci 103(0x67,0x1870), static,
broadcast,
CISCO, status defined, active
R2#sh frame map
Serial0/0 (up): ip 11.1.1.1 dlci 201(0xC9,0x3090), static,
broadcast,
CISCO, status defined, active
R3#sh frame map
Serial0/0 (up): ip 11.1.1.1 dlci 301(0x12D,0x48D0), static,
broadcast,
CISCO, status defined, active
已經建立完畢
測試連通性：
R3#ping 11.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 11.1.1.1, timeout is 2 seconds:
!!!!!(成功)
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/77/96 ms
幀中繼有水平分割，在rip協議中，幀中繼的水平分割默認是被關閉的，在eigrp協議中 幀中繼的水平分割默認是被打開的可查看R1的S0/0接口
R1#sh ip int s0/0
Serial0/0 is up, line protocol is up
Internet address is 11.1.1.1/24
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Multicast reserved groups joined: 224.0.0.9
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is disabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is enabled
IP Flow switching is disabled
我們分別用 rip 和 eigrp做同樣的實驗，首先每臺路由器啟動RIP，通過查看路由表可以發現，R2 R3會學到對方的路由。
R2#sh ip route
1.0.0.0/24 is subnetted, 1 subnets
R 1.1.1.0 [120/1] via 11.1.1.1, 00:00:04, Serial0/0
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
3.0.0.0/24 is subnetted, 1 subnets
R 3.3.3.0 [120/2] via 11.1.1.3, 00:00:04, Serial0/0
11.0.0.0/24 is subnetted, 1 subnets
C 11.1.1.0 is directly connected, Serial0/0
可以看到3.3.3.0的路由
R3#sh ip route
1.0.0.0/24 is subnetted, 1 subnets
R 1.1.1.0 [120/1] via 11.1.1.1, 00:00:06, Serial0/0
2.0.0.0/24 is subnetted, 1 subnets
R 2.2.2.0 [120/2] via 11.1.1.2, 00:00:06, Serial0/0
3.0.0.0/24 is subnetted, 1 subnets
C 3.3.3.0 is directly connected, Loopback0
11.0.0.0/24 is subnetted, 1 subnets
C 11.1.1.0 is directly connected, Serial0/0
可以看到有2.2.2.0 的路由
現在去掉RIP啟動EIGRP再查看結果：
R1(config)#no router rip
R1(config)#router ei 100
R1(config-router)#no au
R1(config-router)#net 1.1.1.0 0.0.0.255
R1(config-router)#net 11.1.1.0 0.0.0.255
R2(config)#no router rip
R2(config)#router ei 100
R2(config-router)#no au
R2(config-router)#net 2.2.2.0 0.0.0.255
R2(config-router)#net 11.1.1.0 0.0.0.255
R3(config)#no router rip
R3(config)#router ei 100
R3(config-router)#no au
R3(config-router)#net 3.3.3.0 0.0.0.255
R3(config-router)#net 11.1.1.0 0.0.0.255