Refer to the exhibit. Why did R1 and R2 not establish an adjacency?

Last Updated: Jan 2, 2025
IT Exam Items Repository › Category: CCNA › Refer to the exhibit. Why did R1 and R2 not establish an adjacency?

Refer to the exhibit. Why did R1 and R2 not establish an adjacency?

  • The IPv4 address of Fa0/0 interface of R1 has a wrong IP address.
  • The AS number does not match on R1 and R2.
  • The automatic summarization is enabled on R1 and R2.
  • There is no network command for the network 192.168.1.0/24 on R1.

Explanation: To establish adjacency, both routers must be configured with the same AS number. The network 192.168.0.0 .0.0.255.255 command issued on R1 includes all networks from 192.168.0.0 to 192.168.255.255. Therefore, the network 192.168.1.0/24 is also included.

Case 2:

  • The no shutdown command is misapplied on both routers.​
  • The AS number must be the same on R1 and R2.
  • The router ID must be the same on both routers.
  • R1 S0/0/0 and R2 S0/0/0 are on different networks.​
  • The link-local address must be the same on both routers.

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