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OSPF Summarization Discard Route
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…
Read More »OSPF Suppress Forward Address
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…
Read More »OSPF NSSA LSA Type 7 to 5 Translator Election
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…
Read More »OSPF MD5 Authentication Rotating Key
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…
Read More »OSPF Flood Reduction
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…
Read More »OSPF Demand Circuit
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…
Read More »OSPF per Neighbor Cost
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…
Read More »OSPF Auto Cost Reference Bandwidth
Scenario: The new muppet movie is almost finished. All the actresses prefer to have a dedicated internet connection in their trailers at the movie park. You configure a couple of routers with Gigabit and FastEthernet interfaces. Unfortunately OSPF…
Read More »OSPF DR BDR Election
Scenario: You end up working as one of the network engineers for a nuclear powerplant located in a cartoony looking town. OSPF is being used as the IGP routing protocol but there have been some problems with the…
Read More »OSPF Virtual Link
Scenario: You are a freelance network engineer specialized in routing and switching. One of your customers (a local butcher) has some trouble setting up their OSPF network. Some of the networks are not reachable and it’s up to…
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