BGP Disable Connected Check


You are a big poker fan and also a master in networking. Your favorite online poker room has been experiencing connection problems and you decided to help them out. They added another link to the service provider for extra redundancy, now the only thing left to do is making sure the BGP configuration is also correct…can you go all-in on this one?


  • All IP addresses have been preconfigured as specified in the topology picture.
  • Create 2 static routes pointing to each others loopback interface:
    For the 10.1.12.X link use an administrative distance of 10.
    For the 10.2.12.X link use an administrative distance of 20.
  • Ensure you can ping every IP address.
  • Configure EBGP and use the correct AS numbers, the updates must be sources from the loopback interfaces.
  • You are not allowed to use EBGP Multihop to solve this problem.




BGP Disable Connected Check

Video Solution:

Configuration Files

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Written by René Molenaar - CCIE #41726

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About the Author: Rene Molenaar

René - CCIE #41726 is the creator of where he shares CCNA, CCNP and CCIE R&S labs. He also blogs about networking on


  1. To get more challenge in this lab add the following requirement:
    – You are not allowed to use disable-connected-check command

    There is one more choice to do this!

  2. link to the video has gone dead did you know ? video is still on youtube though..
    I think he has to talking about ttl-security command it similar to mutlihop but subtracts the hop count i.e 255-N ? and expects no less.

  3. if it isn’t ebgp multihop, nor is it disable-connected-check, it probably is ttl-security feature.

  4. It seems any combination of ebgp-multihop / ttl-security hops / disable-connected-check will work for this case and both sides don’t have to have the same configuration.

  5. So, how exactly does the disable-connected-check affect the TTL count? It’s a good lab, and it all works, but I’m looking for a quick explanation on what this command does behind the scenes.

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