Tag: ccie-rs
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 Capability Transit Troubleshooting
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…
Read More »EIGRP Summarization without Null0
Scenario: You are applying for a job as a senior network engineer at a large ISP. They heard you passed your CCIE so they want to test you by giving a topology with an EIGRP summarization question. Let’s…
Read More »EIGRP Summarization Leak-Map
Scenario: The movie industry is dominated by Holly- and Bollywood. Recently the two companies are creating movies together and using a shared network infrastructure. To make sure the routing tables of the EIGRP routes don’t grow too much…
Read More »ODR (On Demand Routing)
Scenario: The international network of the Benelux doesn’t have any more fancy equipment since the last cost saving project. The current routers don’t support any routing protocol except ODR (On Demand Routing). You don’t want to use static…
Read More »Recursive Routing Failure
Scenario: You work as the network engineer for a company with an ambitious plan to build a tunnel between Japan and Australia. To support this project you have to configure the network with some new routers. You configure…
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