300-510 Implementing Cisco Service Provider Advanced Routing Solutions (SPRI)

A network consultant is troubleshooting IS-IS instances to identify why a routing domains is having communication problems between the two instances. Which description of the possible cause of issues in the routing domain is true?

  • A. The same interface cannot be advertised in two different IS-IS instances
  • B. The IS-IS “ISP” and “ISP2” instances are unrelated and unable to intercommunicate
  • C. The configured IS-IS NSEL value is not allowing the routing systems to establish a neighborship
  • D. The interface mode ip router is-is command was not included in the script
Answer: Option A.
Explanation: 

Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/xe-3s/irs-xe-3s-book/irs-instance-vrf.html

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