300-510 SPRI: Implementing Cisco Service Provider Advanced Routing SolutionsDemo

By Cisco · Question Mode

QuestionQ226

Unicast Routing

For what reason might two BGP peers be unable to establish a neighbor relationship?

  • A Their BGP send-community strings are misconfigured
  • B Their BGP timers are mismatched
  • C Their remote-as numbers are misconfigured
  • D They are both activated under an IPv4 address family
Explanation

A BGP session requires each peer’s configured remote-as to correspond to the autonomous system presented by the remote peer. A mismatched remote AS causes OPEN-message validation to fail, preventing the neighbor relationship from being established. Cisco documents that remote-as creates the BGP neighbor and identifies whether it is internal or external.

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