What are three issues that may cause the forming a BGP neighbor relationship to fail? (Choose three.)

IT Questions BankCategory: CCNPWhat are three issues that may cause the forming a BGP neighbor relationship to fail? (Choose three.)
What are three issues that may cause the forming a BGP neighbor relationship to fail? (Choose three.) 1ITExamAnswers Staff asked 3 weeks ago

Question:

What are three issues that may cause the forming a BGP neighbor relationship to fail? (Choose three.)

  • TCP port 169 being blocked by a firewall
  • broken Layer 3 connectivity
  • the path to the neighbor being through the default route
  • interface being down
  • only iBGP being configured on the router
  • the holddown timer not matching between BGP peers

Explanation: Some of the reasons that a BGP neighbor relationship might not form are as follows:

  • Interface is down : The interface must be up/up.
  • Layer 3 connectivity is broken : The IP address for a neighbor must be reachable.
  • Path to the neighbor is through the default route : A neighbor must be reachable using a route other than the default route.
  • ACLs : An access control list (ACL) or a firewall may be blocking TCP port 179.
  • Timers : Timers do not have to match; however, if the minimum holddown from neighbor option is set, it could prevent a neighbor adjacency.

More Questions: CCNP Enterprise: Advanced Routing (Version 8.0) – BGP Exam


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