CCNP-EIGRP路由汇总

精选转载

IT失败者 2010-03-09 12:05:32 博主文章分类：转载

文章标签 职场路由 EIGRP 汇总休闲 文章分类 网络安全

CCNP-EIGRP路由汇总：

实验拓扑：

实验目标：

EIGRP的自动汇总和EIGRP的手工汇总

路由的基本配置（略）

IP地址配置：(R1.R2启用2个环回接口，R4启用4个环回接口)

r1(config)#in s1/0

r1(config-if)#ip add 219.146.0.1 255.255.255.0

r1(config-if)#no sh

r1(config-if)#in loo 0

r1(config-if)#ip add 219.146.4.1 255.255.255.0

r1(config-if)#in loo 1

r1(config-if)#ip add 219.146.5.1 255.255.255.0

r1(config-if)#exi

r2(config)#in s1/0

r2(config-if)#ip add 219.146.2.1 255.255.255.0

r2(config-if)#no sh

r2(config-if)#in loo 0

r2(config-if)#ip add 219.146.6.1 255.255.255.0

r2(config-if)#in loo 1

r2(config-if)#ip add 219.146.7.1 255.255.255.0

r2(config-if)#exi

r3(config)#in s1/0

r3(config-if)#ip add 219.146.0.2 255.255.255.0

r3(config-if)#no sh

r3(config-if)#in s1/1

r3(config-if)#ip add 219.146.2.2 255.255.255.0

r3(config-if)#no sh

r3(config-if)#in s1/2

r3(config-if)#ip add 219.146.3.1 255.255.255.0

r3(config-if)#no sh

r3(config-if)#exi

r4(config)#in s1/0

r4(config-if)#ip add 219.146.3.2 255.255.255.0

r4(config-if)#no sh

r4(config-if)#in loo 0

r4(config-if)#ip add 219.146.8.1 255.255.255.0

r4(config-if)#in loo 1

r4(config-if)#ip add 219.146.9.1 255.255.255.0

r4(config-if)#in loo 2

r4(config-if)#ip add 219.146.10.1 255.255.255.0

r4(config-if)#in loo 3

r4(config-if)#ip add 219.146.11.1 255.255.255.0

r4(config-if)#exi

EIGRP的自动汇总：

配置EIGRP:(不关闭自动汇总)

r1(config)#no router e 10

r1(config)#router e 10

r1(config-router)#net 219.146.0.0 0.0.0.255

r1(config-router)#net 219.146.4.0 0.0.1.255 //汇总宣告（并不是路由汇总）

r1(config-router)#exi

r2(config)#router e 10

r2(config-router)#net 219.146.2.0 0.0.0.255

r2(config-router)#net 219.146.6.0 0.0.1.255

r2(config-router)#exi

r3(config)#router e 10

r3(config-router)#net 219.146.0.0 0.0.0.255

r3(config-router)#net 219.146.2.0 0.0.1.255

r3(config-router)#exi

r4(config)#router e 10

r4(config-router)#net 219.146.3.0 0.0.0.255

r4(config-router)#net 219.146.8.0 0.0.0.255 //注意这里的宣告。不能全部汇总。

r4(config-router)#net 219.146.9.0 0.0.0.255

r4(config-router)#net 219.146.10.0 0.0.1.255

r4(config-router)#exi

现在来看一下路由表：

r1(config)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D 219.146.6.0/24 [90/2809856] via 219.146.0.2, 00:00:27, Serial1/0

D 219.146.7.0/24 [90/2809856] via 219.146.0.2, 00:00:27, Serial1/0

C 219.146.4.0/24 is directly connected, Loopback0

C 219.146.5.0/24 is directly connected, Loopback1

D 219.146.2.0/24 [90/2681856] via 219.146.0.2, 00:00:29, Serial1/0

D 219.146.3.0/24 [90/2681856] via 219.146.0.2, 00:00:29, Serial1/0

C 219.146.0.0/24 is directly connected, Serial1/0

D 219.146.10.0/24 [90/2809856] via 219.146.0.2, 00:00:26, Serial1/0

D 219.146.11.0/24 [90/2809856] via 219.146.0.2, 00:00:26, Serial1/0

D 219.146.8.0/24 [90/2809856] via 219.146.0.2, 00:00:26, Serial1/0

D 219.146.9.0/24 [90/2809856] via 219.146.0.2, 00:00:26, Serial1/0

r2(config)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

C 219.146.6.0/24 is directly connected, Loopback0

C 219.146.7.0/24 is directly connected, Loopback1

D 219.146.4.0/24 [90/2809856] via 219.146.2.2, 00:01:45, Serial1/0

D 219.146.5.0/24 [90/2809856] via 219.146.2.2, 00:01:45, Serial1/0

C 219.146.2.0/24 is directly connected, Serial1/0

D 219.146.3.0/24 [90/2681856] via 219.146.2.2, 00:01:45, Serial1/0

D 219.146.0.0/24 [90/2681856] via 219.146.2.2, 00:01:45, Serial1/0

D 219.146.10.0/24 [90/2809856] via 219.146.2.2, 00:01:44, Serial1/0

D 219.146.11.0/24 [90/2809856] via 219.146.2.2, 00:01:44, Serial1/0

D 219.146.8.0/24 [90/2809856] via 219.146.2.2, 00:01:44, Serial1/0

D 219.146.9.0/24 [90/2809856] via 219.146.2.2, 00:01:44, Serial1/0

r3(config-if)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D 219.146.6.0/24 [90/2297856] via 219.146.2.1, 00:02:04, Serial1/1

D 219.146.7.0/24 [90/2297856] via 219.146.2.1, 00:02:04, Serial1/1

D 219.146.4.0/24 [90/2297856] via 219.146.0.1, 00:02:06, Serial1/0

D 219.146.5.0/24 [90/2297856] via 219.146.0.1, 00:02:06, Serial1/0

C 219.146.2.0/24 is directly connected, Serial1/1

C 219.146.3.0/24 is directly connected, Serial1/2

C 219.146.0.0/24 is directly connected, Serial1/0

D 219.146.10.0/24 [90/2297856] via 219.146.3.2, 00:02:04, Serial1/2

D 219.146.11.0/24 [90/2297856] via 219.146.3.2, 00:02:04, Serial1/2

D 219.146.8.0/24 [90/2297856] via 219.146.3.2, 00:02:04, Serial1/2

D 219.146.9.0/24 [90/2297856] via 219.146.3.2, 00:02:04, Serial1/2

r4(config)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D 219.146.6.0/24 [90/2809856] via 219.146.3.1, 00:02:28, Serial1/0

D 219.146.7.0/24 [90/2809856] via 219.146.3.1, 00:02:28, Serial1/0

D 219.146.4.0/24 [90/2809856] via 219.146.3.1, 00:02:28, Serial1/0

D 219.146.5.0/24 [90/2809856] via 219.146.3.1, 00:02:28, Serial1/0

D 219.146.2.0/24 [90/2681856] via 219.146.3.1, 00:02:28, Serial1/0

C 219.146.3.0/24 is directly connected, Serial1/0

D 219.146.0.0/24 [90/2681856] via 219.146.3.1, 00:02:28, Serial1/0

C 219.146.10.0/24 is directly connected, Loopback2

C 219.146.11.0/24 is directly connected, Loopback3

C 219.146.8.0/24 is directly connected, Loopback0

C 219.146.9.0/24 is directly connected, Loopback1

看到虽然开启了自动汇总，但实际上并没有汇总，因为这里的有类网络相同(C类)，子网掩码相同(/24)，所以EIGRP不进行自动汇总。修改一下：

r1(config)#in loo 0

r1(config-if)#no ip add

r1(config-if)#ip add 219.146.4.1 255.255.255.128

r1(config-if)#in loo 1

r1(config-if)#no ip add

r1(config-if)#ip add 219.146.4.129 255.255.255.128

r1(config-if)#exi

r1(config)#router e 10

r1(config-router)#no net 219.146.4.0 0.0.1.255

r1(config-router)#net 219.146.4.0 0.0.0.255

r1(config-router)#exi

再查看一下：

r3(config)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D 219.146.6.0/24 [90/2297856] via 219.146.2.1, 00:18:06, Serial1/1

D 219.146.7.0/24 [90/2297856] via 219.146.2.1, 00:18:06, Serial1/1

D 219.146.4.0/24 [90/2297856] via 219.146.0.1, 00:00:05, Serial1/0

C 219.146.2.0/24 is directly connected, Serial1/1

C 219.146.3.0/24 is directly connected, Serial1/2

C 219.146.0.0/24 is directly connected, Serial1/0

D 219.146.10.0/24 [90/2297856] via 219.146.3.2, 00:18:06, Serial1/2

D 219.146.11.0/24 [90/2297856] via 219.146.3.2, 00:18:06, Serial1/2

D 219.146.8.0/24 [90/2297856] via 219.146.3.2, 00:18:06, Serial1/2

D 219.146.9.0/24 [90/2297856] via 219.146.3.2, 00:18:06, Serial1/2

已经进行了汇总。

下面在R1上关闭自动汇总，会发生什么情况？

r1(config)#router e 10

r1(config-router)#no au

r1(config-router)#exi

再看一下R3的路由表：

r3(config)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D 219.146.6.0/24 [90/2297856] via 219.146.2.1, 00:21:30, Serial1/1

D 219.146.7.0/24 [90/2297856] via 219.146.2.1, 00:21:30, Serial1/1

219.146.4.0/25 is subnetted, 2 subnets

D 219.146.4.0 [90/2297856] via 219.146.0.1, 00:01:16, Serial1/0

D 219.146.4.128 [90/2297856] via 219.146.0.1, 00:01:16, Serial1/0

C 219.146.2.0/24 is directly connected, Serial1/1

C 219.146.3.0/24 is directly connected, Serial1/2

C 219.146.0.0/24 is directly connected, Serial1/0

D 219.146.10.0/24 [90/2297856] via 219.146.3.2, 00:21:29, Serial1/2

D 219.146.11.0/24 [90/2297856] via 219.146.3.2, 00:21:29, Serial1/2

D 219.146.8.0/24 [90/2297856] via 219.146.3.2, 00:21:29, Serial1/2

D 219.146.9.0/24 [90/2297856] via 219.146.3.2, 00:21:29, Serial1/2

看到现在并没有进行汇总，当然在R2、R4上也没有进行汇总。

因为EIGRP只对参与的网络(直连网络)进行自动汇总。

总结：

EIGRP自动汇兑的条件：

(1)有类网络不同

(2)子网掩码不同

(3)参与的网络

EIGRP的手工汇总：

以R1为例：

r1(config)#in s1/0 //在接口下做路由汇总

r1(config-if)#ip summary-address eigrp 10 219.146.4.0 255.255.255.0

r1(config-if)#exi

r3(config)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D 219.146.6.0/24 [90/2297856] via 219.146.2.1, 00:40:19, Serial1/1

D 219.146.7.0/24 [90/2297856] via 219.146.2.1, 00:40:19, Serial1/1

D 219.146.4.0/24 [90/2297856] via 219.146.0.1, 00:00:34, Serial1/0

C 219.146.2.0/24 is directly connected, Serial1/1

C 219.146.3.0/24 is directly connected, Serial1/2

C 219.146.0.0/24 is directly connected, Serial1/0

D 219.146.10.0/24 [90/2297856] via 219.146.3.2, 00:40:18, Serial1/2

D 219.146.11.0/24 [90/2297856] via 219.146.3.2, 00:40:18, Serial1/2

D 219.146.8.0/24 [90/2297856] via 219.146.3.2, 00:40:18, Serial1/2

D 219.146.9.0/24 [90/2297856] via 219.146.3.2, 00:40:18, Serial1/2

已经汇总了。再查看一下R1.这样看：

r1#sh ip rou 219.146.4.0 255.255.255.0

Routing entry for 219.146.4.0/24

Known via "eigrp 10", distance 5, metric 128256, type internal

Redistributing via eigrp 10

Routing Descriptor Blocks:

* directly connected, via Null0

Route metric is 128256, traffic share count is 1

Total delay is 5000 microseconds, minimum bandwidth is 10000000 Kbit

Reliability 255/255, minimum MTU 1514 bytes

Loading 1/255, Hops 0

看到这条汇总的路由管理距离是5.这个管理距离只在本地有效。在别的路由器上看不是5.

r1#sh run int s1/0

Building configuration...

Current configuration : 146 bytes

interface Serial1/0

ip address 219.146.0.1 255.255.255.0

ip summary-address eigrp 10 219.146.4.0 255.255.255.0 5

serial restart-delay 0

end

这样也能看到管理距离是5.

手工汇总总结：

EIGRP手工汇总可以在任意接口下。（出接口）

EIGRP手工汇总后的度量值是汇总前所有路由度量值最小的。

EIGRP手工汇总后在本地会产生一条指向Null0的路由。（避免环路）

EIGRP手工汇总后只有当所有明细路由都消失了才会删除汇总路由。

EIGRP不支持CIDR（超网)。

本文出自 “放飞梦想” 博客，请务必保留此出处http://chenbin.blog.51cto.com/945033/281122

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CCNP-EIGRP路由汇总

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