Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 326
The summary route is not shown in the Router_B routing table after this below configuration on Router_A:
interface ethernet 0
description location ID:S4318T3E77F02
ip address 192.168.3.1 255.255.255.0
ip summary-address eigrp 1 172.16.80.0 255.255.240.0
Which Router_A configuration resolves the issue by advertising the summary route to Router_B?
Answer options
- A. interface loopback 0 ip address 172.18.81.1 255.255.255.0 interface Ethernet 0 ip address 192.168.3.1 255.255.255.0 ip summary-address eigrp 1 172.16.80.0 255.255.240.0
- B. interface loopback 0 ip address 172.16.79.1 255.255.255.0 interface Ethernet 0 ip address 192.168.3.1 255.255.255.0 ip summary-address eigrp 1 172.16.80.0 255.255.240.0
- C. interface loopback 0 ip address 172.16.81.1 255.255.255.0 interface Ethernet 0 ip address 192.168.3.1 255.255.255.0 ip summary-address eigrp 1 172.16.80.0 255.255.240.0
- D. interface loopback 0 ip address 172.16.96.1 255.255.255.0 interface Ethernet 0 ip address 192.168.3.1 255.255.255.0 ip summary-address eigrp 1 172.16.80.0 255.255.240.0
Correct answer: C
Explanation
The correct answer is C because the loopback interface must have an IP address that falls within the range of the summary route being advertised. Options A and B use IP addresses that do not align with the summary route, while option D has an incorrect address as well, which prevents the summary route from being successfully advertised.