Shulou(Shulou.com)06/01 Report--

1. Experimental topology

2. Basic configuration

R1 configurations

interface Serial0/0

ip address 14.1.1.1 255.255.255.0

interface Serial0/1

ip address 13.1.1.1 255.255.255.0

R2 configuration

interface Serial0/0

ip address 24.1.1.2 255.255.255.0

interface Serial0/1

ip address 23.1.1.2 255.255.255.0

R3 configuration

interface Loopback0

ip address 3.3.3.3 255.255.255.0

interface Serial0/0

ip address 13.1.1.3 255.255.255.0

interface Serial0/1

ip address 23.1.1.3 255.255.255.0

R4 configuration

interface Loopback0

ip address 4.4.4.4 255.255.255.0

interface Serial0/0

ip address 14.1.1.4 255.255.255.0

interface Serial0/1

ip address 24.1.1.4 255.255.255.0

RIP and OSPF bidirectional redistribution (problematic)

R1 configurations

router ospf 110

router-id 1.1.1.1

redistribute rip subnets

network 13.1.1.0 0.0.0.255 area 0

router rip

version 2

redistribute ospf 110 metric 1

network 14.0.0.0

no auto-summary

R2 configuration

router ospf 110

router-id 2.2.2.2

redistribute rip subnets

network 23.1.1.0 0.0.0.255 area 0

router rip

version 2

redistribute ospf 110 metric 1

network 24.0.0.0

no auto-summary

R3 configuration

router ospf 110

router-id 3.3.3.3

network 3.3.3.0 0.0.0.255 area 0

network 13.1.1.0 0.0.0.255 area 0

network 23.1.1.0 0.0.0.255 area 0

R4 configuration

router rip

version 2

network 4.0.0.0

network 14.0.0.0

network 24.0.0.0

no auto-summary

At this point, we found that both R1 and R2 have abnormal routes, mainly due to AD values.

For example, R1 learned routes 4.4.4.0/24 and 24.1.1.0/24 from both RIP and OSPF. It is reasonable to choose the route learned from RIP, but because OSPF AD is smaller than RIP, all R1s prefer the route learned from OSPF. All you have to do is change the AD of RIP redistributed into OSPF to greater than 120 to resolve the problem.

R1 configurations

router ospf 110

distance 121 2.2.2.2 0.0.0.0

R2 configuration

router ospf 110

distance 121 1.1.1.1 0.0.0.0

It was followed by RID.

RIP and EIGRP bidirectional redistribution (no problem)

R1 configurations

router eigrp 90

redistribute rip metric 1500 100 255 1 1500

network 13.1.1.0 0.0.0.255

auto-summary

router rip

version 2

redistribute eigrp 90 metric 1

network 14.0.0.0

no auto-summary

R2 configuration

router eigrp 90

redistribute rip metric 1500 100 255 1 1500

network 23.1.1.0 0.0.0.255

no auto-summary

router rip

version 2

redistribute eigrp 90 metric 1

network 24.0.0.0

no auto-summary

R3 configuration

router eigrp 90

network 3.3.3.0 0.0.0.255

network 13.1.1.0 0.0.0.255

network 23.1.1.0 0.0.0.255

no auto-summary

R4 configuration

router rip

version 2

network 4.0.0.0

network 14.0.0.0

network 24.0.0.0

no auto-summary

5. OSPF and EIGRP bi-directional redistribution (no problem)

R1 configurations

router eigrp 90

redistribute ospf 110 metric 1500 100 255 1 1500

network 13.1.1.0 0.0.0.255

auto-summary

router ospf 110

router-id 1.1.1.1

redistribute eigrp 90 subnets

network 14.1.1.0 0.0.0.255 area 0

R2 configuration

router eigrp 90

redistribute ospf 110 metric 1500 100 255 1 1500

network 23.1.1.0 0.0.0.255

no auto-summary

router ospf 110

router-id 2.2.2.2

redistribute eigrp 90 subnets

network 24.1.1.0 0.0.0.255 area 0

R3 configuration

router eigrp 90

network 3.3.3.0 0.0.0.255

network 13.1.1.0 0.0.0.255

network 23.1.1.0 0.0.0.255

no auto-summary

R4 configuration

router ospf 110

router-id 4.4.4.4

network 4.4.4.0 0.0.0.255 area 0

network 14.1.1.0 0.0.0.255 area 0

network 24.1.1.0 0.0.0.255 area 0

It can be seen that there is no problem with EIGRP and RIP or OSPF bi-directional redistribution, and there is bi-directional redistribution before RIP and OSPF.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.