21. Special Area totally stub of OSPF configuration experiment

1, Special area totally stub analysis

Area type	Role	Default route	Note	Command
Stub	Filter LSA4, LSA5	ABR default 3 class default route, seed cost value is 1	All routers in the region must be configured as stubs, otherwise the neighbors do not come up and cannot contain ASBR	Area 2 stub Area 2 Default-cost X
Totally stub	Filter LSA3, LSA4, LSA5	ABR default 3 class default route, seed cost value is 1	All routers in the region must be configured as stubs, otherwise the neighbors do not come up and cannot contain ASBR	Area 2 stub no-summary

2. Experimental topology

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3. Experiment Configuration

R1 Configuration

Interface Loopback0

IP Address 1.1.1.1 255.255.255.0

Interface serial0/0

IP address 12.1.1.1 255.255.255.0

router OSPF 110

Router-id 1.1.1.1

Network 12.1.1.0 0.0.0.255 Area 2

R2 Configuration

Interface Loopback0

IP address 2.2.2.2 255.255.255.0

Interface serial0/0

IP address 12.1.1.2 255.255.255.0

Interface SERIAL0/1

IP address 23.1.1.2 255.255.255.0router OSPF 110

Router-id 2.2.2.2

Network 12.1.1.0 0.0.0.255 Area 2

Network 23.1.1.0 0.0.0.255 Area 0

R3 Configuration

Interface Loopback0

IP address 3.3.3.3 255.255.255.0

Interface serial0/0

IP address 34.1.1.3 255.255.255.0

Interface SERIAL0/1

IP address 23.1.1.3 255.255.255.0router OSPF 110

Router-id 3.3.3.3

Network 23.1.1.0 0.0.0.255 Area 0

Network 34.1.1.0 0.0.0.255 Area 1

R4 Configuration

Interface Loopback0

IP address 4.4.4.4 255.255.255.0

Interface serial0/0

IP address 34.1.1.4 255.255.255.0

Interface SERIAL0/1

IP address 45.1.1.4 255.255.255.0

router OSPF 110

Router-id 4.4.4.4

Redistribute RIP subnets

Network 34.1.1.0 0.0.0.255 Area 1

R5 Configuration

Interface Loopback0

IP address 5.5.5.5 255.255.255.0

Interface SERIAL0/1

IP address 45.1.1.5 255.255.255.0

Serial Restart-delay 0

Router RIP

Version 2

Network 5.0.0.0

Network 45.0.0.0

No auto-summary

4. Experimental verification

Filter LSA3, LSA4, LSA4

Before configuring the Totally stub

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ABR delegating Class 3 default route

Before configuring the Totally stub

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After configuring the totally stub

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This article is from the "Open Source Hall" blog, please be sure to keep this source http://kaiyuandiantang.blog.51cto.com/10699754/1718411

21. Special Area totally stub of OSPF configuration experiment