Which of the following causes IS-IS neighbor relationship failure? (Multiple choice)
A. The system ID of the device at both ends of the link are the same.
B. The IS-IS levels at both ends of the link do not match.
C. When establishing IS-IS Level-1 neighbors, the regional addresses of the devices at both ends of the link do not match.
D. IP addresses of the interfaces at both ends of the link are not on the same network segment.
Answer:A
Which of the following causes IS-IS neighbor relationship failure? (Multiple choice)
A. The system ID of the device at both ends of the link are the same. B. The IS-IS levels at both ends of the link do not match. C. When establishing IS-IS Level-1 neighbors, the regional addresses of the devices at both ends of the link do not match. D. IP addresses of the interfaces at both ends of the link are not on the same network segment.