1, Special Area stub analysis
Area type |
Role |
Default route issued |
Note |
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 |
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 LSA4, LSA4
Before configuring stubs
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650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M00/76/C6/wKiom1ZcIOzwWsO3AAAS0Qq3IRs956.png "style=" float: none; "title=" Stub1.png "alt=" Wkiom1zciozwwso3aaas0qq3irs956.png "/>
650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M00/76/C6/wKioL1ZcIVGzPveMAAASwrSkLis444.png "style=" float: none; "title=" Stub2.png "alt=" Wkiol1zcivgzpvemaaaswrsklis444.png "/>
650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M01/76/C7/wKiom1ZcIO2j6zvhAAAzvMsF6Vc005.png "style=" float: none; "title=" Stub3.png "alt=" Wkiom1zcio2j6zvhaaazvmsf6vc005.png "/>
ABR delegating Class 3 default route
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650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/76/C6/wKioL1ZcIXzg99oWAABG391iLYw429.png "style=" float: none; "title=" Stub5.png "alt=" Wkiol1zcixzg99owaabg391ilyw429.png "/>
This article is from the "Open Source Hall" blog, please be sure to keep this source http://kaiyuandiantang.blog.51cto.com/10699754/1718287
20. Special Area stub of OSPF configuration experiment