Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 239
After implementing EIGRP on your network, you issue the show ip eigrp traffic command on router C. The following output is shown:
RouterC#show ip eigrp traffic -
IP-EIGRP Traffic Statistics for process 1
Hellos sent/received: 2112/2076 -
Updates sent/received: 47/38 -
Queries sent/received: 5/3 -
Replies sent/received: 3/4 -
Acks sent/received: 29/33 -
Input queue high water mark 2, 0 drops
SIA-Queries sent/received: 0/0 -
SIA-Replies sent/received: 0/0 -
Moments later, you issue the same command a second time and the following output is shown:
RouterC#show ip eigrp traffic -
IP-EIGRP Traffic Statistics for process 1
Hellos sent/received: 2139/2104 -
Updates sent/received: 50/39 -
Queries sent/received: 5/4 -
Replies sent/received: 4/4 -
Acks sent/received: 31/37 -
Input queue high water mark 2, 0 drops
SIA-Queries sent/received: 0/0 -
SIA-Replies sent/received: 0/0 -
Moments later, you issue the same command a third time and the following output is shown:
RouterC#show ip eigrp traffic -
IP-EIGRP Traffic Statistics for process 1
Hellos sent/received: 2162/2126 -
Updates sent/received: 53/42 -
Queries sent/received: 5/5 -
Replies sent/received: 5/4 -
Acks sent/received: 35/41 -
Input queue high water mark 2, 0 drops
SIA-Queries sent/received: 0/0 -
SIA-Replies sent/received: 0/0 -
What information can you determine about this network?
Answer options
- A. The network is stable.
- B. There is a flapping link or interface, and router C knows an alternate path to the network.
- C. There is a flapping link or interface, and router C does not know an alternate path to the network.
- D. EIGRP is not working correctly on router C.
Correct answer:
Explanation
The correct answer is B because the increases in hellos, updates, and acks indicate that there is activity and potential instability, suggesting a flapping link. Options A and D are incorrect as they do not reflect the observed traffic changes, and option C is also incorrect because the statistics show that router C is still receiving updates and acks, indicating it has an alternate path.