Tag: ospf

OSPF Neighbor Troubleshooting

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Scenario: The hotel agency has had several network engineers trying to configure OSPF for them. As a result the whole network is one big mess and they decide to hire you to fix their problems. There are two…

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OSPF Summarization Troubleshooting

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Scenario: Mystical Corporation is using OSPF within their autonomous system. Their network is configured using different areas which seems to be working fine. One of the network engineers configured a summary for area 0 but it seems it’s…

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OSPF Summarization Discard Route

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Scenario: Ever since you encountered a router your quest has been to become a succesful network engineer. Your career is prosperous and there isn’t a bit that you haven’t slain before. This time however you are running into…

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OSPF Suppress Forward Address

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Scenario: You are the senior network engineer for a company that runs the show “Two and a half Router”. To increase OSPF performance your colleague has implemented a NSSA area and some prefix filters. Strangely enough you now…

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OSPF NSSA LSA Type 7 to 5 Translator Election

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Scenario: You run a company that sells Virtual Worlds for gamers. The network you are using is running on OSPF and one of the areas is a NSSA. At the moment you are not sure which router is…

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OSPF MD5 Authentication Rotating Key

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Scenario: You work for the government as a contracted network engineer. They want you to improve their OSPF security. Instead of using a single key for all routers they want to ensure each OSPF neighbor adjacency has a…

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OSPF Flood Reduction

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Scenario: You live on a tropical island and work as a network engineer and scientist. After years of study you have discovered a formula so you do not age anymore. Unfortunately your network is running OSPF and LSAs…

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OSPF Demand Circuit

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Scenario: Living on a tropical island isn’t all that bad. You run a small network used to order cocktails at the Coconut Bar so they are delivered at Palm beach. Unfortunately the links you are using are leased…

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OSPF Capability Transit Troubleshooting

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Scenario: After months of hard work, studying and doing labs you have the feeling you truly know how routing protocols work. Your boss decides to upgrade your salary and your title from Trainee to Junior network engineer and…

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OSPF per Neighbor Cost

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Scenario: The local fish trading market needs your help with their OSPF network. It seems their routers are unable to change the bandwidth or cost on the interfaces so you need to use another solution to influence OSPF…

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