1. EIGRP基本配置
1.1. 介绍
本文档描述了EIGRP的基本配置，
1.2. 拓扑图
1.3. 配置
1.3.1. R1配置
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip cef
!
!
interface Loopback0
ip address 1.1.1.1 255.255.255.0
!
interface Loopback1
ip address 1.1.2.1 255.255.255.0
!
interface Loopback2
ip address 1.1.3.1 255.255.255.0
!
interface FastEthernet0/0
ip address 12.1.1.1 255.255.255.0
duplex auto
speed auto
!
!
!
router eigrp 1 //起一个EIGRP进程。AS号要求一致
network 1.0.0.0
network 12.1.1.1 0.0.0.0
auto-summary //默认自动汇总
!
!
!
!
gatekeeper
shutdown
!
!
!
end
1.3.2. R2配置
Current configuration : 1006 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
interface FastEthernet0/0
ip address 12.1.1.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet2/0
ip address 23.1.1.2 255.255.255.0
duplex half
!
router eigrp 1
network 12.1.1.2 0.0.0.0
network 23.1.1.2 0.0.0.0
auto-summary
!
!
!
End
1.3.3. R3配置
R3#sh run
Building configuration...
Current configuration : 1057 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
interface Loopback0
ip address 3.3.1.1 255.255.255.0
!
interface Loopback1
ip address 3.3.2.1 255.255.255.0
!
interface Loopback2
ip address 3.3.3.1 255.255.255.0
!
interface FastEthernet2/0
ip address 23.1.1.3 255.255.255.0
duplex half
!
!
router eigrp 1
network 3.0.0.0
network 23.0.0.0
auto-summary
!
!
!
control-plane
!
!
!
end
1.4.R1调试过程
R1#debug eigrp packets query update reply //调试查看EIGRP的query、update、reply包
*Apr 20 20:38:45.867: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 12.1.1.2 (FastEthernet0/0) is up: new adjacency //形成邻接关系
*Apr 20 20:38:45.871: EIGRP: Enqueueing UPDATE on FastEthernet0/0 nbr 12.1.1.2 iidbQ un/rely 0/1 peerQ un/rely 0/0
*Apr 20 20:38:45.879: EIGRP: Received UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:45.879: AS 1, Flags 0x1, Seq 18/0 idbQ 0/0 iidbQ un/rely 0/1 peerQ un/rely 0/0
*Apr 20 20:38:45.887: EIGRP: Received UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:45.887: AS 1, Flags 0xA, Seq 19/0 idbQ 0/0 iidbQ un/rely 0/1 peerQ un/rely 0/0
*Apr 20 20:38:45.895: EIGRP: Enqueueing UPDATE on FastEthernet0/0 iidbQ un/rely 0/1 serno 1-6
*Apr 20 20:38:45.919: EIGRP: Enqueueing UPDATE on FastEthernet0/0 nbr 12.1.1.2 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 1-6
*Apr 20 20:38:45.927: EIGRP: Sending UPDATE on FastEthernet0/0
*Apr 20 20:38:45.927: AS 1, Flags 0xA, Seq 2/0 idbQ 0/0 iidbQ un/rely 0/0 serno 1-6
*Apr 20 20:38:45.943: EIGRP: Sending UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:45.943: AS 1, Flags 0x1, Seq 1/18 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/2
*Apr 20 20:38:46.015: EIGRP: Received UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:46.019: AS 1, Flags 0x8, Seq 19/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/2
*Apr 20 20:38:46.035: EIGRP: Sending UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:46.035: AS 1, Flags 0x8, Seq 2/19 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 1-6
*Apr 20 20:38:46.107: EIGRP: Received UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:46.11
R1(config-router)#1: AS 1, Flags 0x8, Seq 20/1 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Apr 20 20:38:46.115: EIGRP: Enqueueing UPDATE on FastEthernet0/0 iidbQ un/rely 0/1 serno 7-8
*Apr 20 20:38:46.123: EIGRP: Enqueueing UPDATE on FastEthernet0/0 nbr 12.1.1.2 iidbQ un/rely 0/0 peerQ un/rely 0/0 serno 7-8
*Apr 20 20:38:46.223: EIGRP: Received UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:46.227: AS 1, Flags 0x2, Seq 21/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/2
*Apr 20 20:38:46.231: EIGRP: Received UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:46.231: AS 1, Flags 0x0, Seq 21/2 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/2
*Apr 20 20:38:46.647: EIGRP: Sending UPDATE on FastEthernet0/0 nbr 12.1.1.2
*Apr 20 20:38:46.651: AS 1, Flags 0x8, Seq 4/21 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1 serno 1-6
1.5.查看路由表
1.5.1. R1的路由表
R1#sh ip route
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
1.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 1.1.1.0/24 is directly connected, Loopback0
D 1.0.0.0/8 is a summary, 00:02:36, Null0 //汇总路由指向了null0，用于防止环路
C 1.1.2.0/24 is directly connected, Loopback1
C 1.1.3.0/24 is directly connected, Loopback2
D 3.0.0.0/8 [90/158720] via 12.1.1.2, 00:02:35, FastEthernet0/0
//因为没有关闭自动汇总，在经过主类网络边界是自动汇总成/8位
D 23.0.0.0/8 [90/30720] via 12.1.1.2, 00:02:35, FastEthernet0/0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.1.1.0/24 is directly connected, FastEthernet0/0
D 12.0.0.0/8 is a summary, 00:02:35, Null0
1.5.2. R2的路由表
R2#sh ip route
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 1.0.0.0/8 [90/156160] via 12.1.1.1, 00:03:17, FastEthernet0/0
D 3.0.0.0/8 [90/156160] via 23.1.1.3, 01:02:35, FastEthernet2/0
23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 23.1.1.0/24 is directly connected, FastEthernet2/0
D 23.0.0.0/8 is a summary, 01:02:58, Null0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.1.1.0/24 is directly connected, FastEthernet0/0
D 12.0.0.0/8 is a summary, 01:02:58, Null0
1.5.3. R3的路由表
R3#sh ip route
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 1.0.0.0/8 [90/158720] via 23.1.1.2, 00:03:55, FastEthernet2/0
3.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 3.3.1.0/24 is directly connected, Loopback0
C 3.3.2.0/24 is directly connected, Loopback1
C 3.3.3.0/24 is directly connected, Loopback2
D 3.0.0.0/8 is a summary, 01:03:14, Null0
23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 23.1.1.0/24 is directly connected, FastEthernet2/0
D 23.0.0.0/8 is a summary, 01:03:14, Null0
D 12.0.0.0/8 [90/30720] via 23.1.1.2, 01:03:13, FastEthernet2/0