Posts Tagged ‘contest solution’

Thanks to everyone that participated in Contest #3. Here are the solutions to both questions:

Question 1: eBGP peering with Loopback interfaces

There are actually three possible solutions to this:

  1. Use the neighbor x.x.x.x ebgp-multihop 2 command
  2. Use the neighbor x.x.x.x disable-connected-check command
  3. Use the neighbor x.x.x.x ttl-security hops 2 command

Many people think that it takes two hops to get from the loopback interface of one router to the loopback interface of a directly connected router but this is not true: it actually takes just one hop. You can refer to this article that attempts to clear up this misunderstanding.

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Contest #2 network

Thanks to everyone who participated in Contest #2 and to those who shared the link. Here is the solution:

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Thanks to everyone that participated and shared the link in some way. Contest #1 is now closed and here is the solution: (more…)