#文章首发挑战赛#
拓扑说明：如图六台路由器组网，OSPF协议区域、EIGRP协议区域、接口IP如图所示。
要求：全网互通，全网通过R1LO1口连接互联网，A1 A3区域只有R5 R6外挂网段的汇总路由，R5上EIGRP、OSPF双向引入，R3R2做虚链路解决A3区域没有与A0相连的问题。
配置：
R1
hostname R1
interface Loopback0
ip address 1.1.1.1 255.255.255.255
interface Loopback1
ip address 10.0.0.1 255.255.255.255
//LO1模拟外部互联网接口
interface GigabitEthernet0/1
ip address 12.0.0.1 255.255.255.0
interface GigabitEthernet0/2
ip address 15.0.0.1 255.255.255.0
router ospf 110
router-id 1.1.1.1
area 2 range 100.0.0.0 255.255.252.0
//区域2的100段路由汇总
network 1.1.1.1 0.0.0.0 area 0
network 12.0.0.1 0.0.0.0 area 0
network 15.0.0.1 0.0.0.0 area 2
default-information originate
//下发默认路由
ip route 0.0.0.0 0.0.0.0 Loopback1
//默认路由指出接口
R5
hostname R5
interface Loopback0
ip address 5.5.5.5 255.255.255.255
interface Loopback1
ip address 100.0.1.1 255.255.255.0
interface Loopback2
ip address 100.0.2.1 255.255.255.0
interface Loopback3
ip address 100.0.3.1 255.255.255.0
interface GigabitEthernet0/0
ip address 56.0.0.1 255.255.255.0
interface GigabitEthernet0/1
ip address 15.0.0.2 255.255.255.0
router eigrp 90
no auto-summary
network 56.0.0.1 0.0.0.0
redistribute ospf 110 metric 1500 100 255 1 1500
//OSPF路由重分布进Eigrp，metric值包含5个部分：带宽、延迟、可靠性、负载、MTU，对标的1500 100 255 1 1500是思科的建议值。
router ospf 110
router-id 5.5.5.5
summary-address 200.0.0.0 255.255.252.0
//外部引入的200路由进行汇总
redistribute eigrp 90 subnets
//Eigrp重分布进OSPF
network 5.5.5.5 0.0.0.0 area 2
network 15.0.0.2 0.0.0.0 area 2
network 100.0.1.1 0.0.0.0 area 2
network 100.0.2.1 0.0.0.0 area 2
network 100.0.3.1 0.0.0.0 area 2
R6
hostname R6
interface Loopback0
ip address 6.6.6.6 255.255.255.255
interface Loopback1
ip address 200.0.1.1 255.255.255.0
interface Loopback2
ip address 200.0.2.1 255.255.255.0
interface Loopback3
ip address 200.0.3.1 255.255.255.0
interface GigabitEthernet0/0
ip address 56.0.0.2 255.255.255.0
router eigrp 90
no auto-summary
network 6.6.6.6 0.0.0.0
network 56.0.0.2 0.0.0.0
network 200.0.1.1 0.0.0.0
network 200.0.2.1 0.0.0.0
network 200.0.3.1 0.0.0.0
R2
hostname R2
interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface GigabitEthernet0/0
ip address 12.0.0.2 255.255.255.0
interface GigabitEthernet0/1
ip address 23.0.0.1 255.255.255.0
router ospf 110
router-id 2.2.2.2
area 1 virtual-link 3.3.3.3
//在区域A1下与R3建立v-link
network 2.2.2.2 0.0.0.0 area 0
network 12.0.0.2 0.0.0.0 area 0
network 23.0.0.1 0.0.0.0 area 1
R3
hostname R3
interface Loopback0
ip address 3.3.3.3 255.255.255.255
interface GigabitEthernet0/0
ip address 34.0.0.1 255.255.255.0
interface GigabitEthernet0/1
ip address 23.0.0.2 255.255.255.0
router ospf 110
router-id 3.3.3.3
area 1 virtual-link 2.2.2.2
//在区域A1下与R2建立v-link
network 3.3.3.3 0.0.0.0 area 1
network 23.0.0.2 0.0.0.0 area 1
network 34.0.0.1 0.0.0.0 area 3
R4
hostname R4
interface Loopback0
ip address 4.4.4.4 255.255.255.255
interface GigabitEthernet0/0
ip address 34.0.0.2 255.255.255.0
router ospf 110
router-id 4.4.4.4
network 4.4.4.4 0.0.0.0 area 3
network 34.0.0.2 0.0.0.0 area 3
配置完成后检查R4 R6路由表，可以看到R4收到100 200两条汇总路由和全网其他路由
R6收到全网路由，互通完成。
