SIMULATION 17
Guidelines
This is a lab item in which tasks will be performed on virtual devices.
Refer to the Tasks tab to view the tasks for this lab item.

Refer to the Topology tab to access the device console(s) and perform the tasks.

Console access is available for all required devices by clicking the device icon or using the

tab(s) above the console window.
All necessary preconfigurations have been applied.

Do not change the enable password or hostname for any device.

Save your configurations to NVRAM before moving to the next item.

Click Next at the bottom of the screen to submit this lab and move to the next question.

When Next is clicked, the lab closes and cannot be reopened.

Topology

Tasks
Complete the tasks below.
Task 1
Ensure that R3's loopback is received via EIGRP on R2. Do not modify the EIGRP default administrative distance to achieve this task.
Task 2
Ensure that Area 1 can accept redistributed routes while blocking Type 5 LSAs. Upon completion, R3's Loopback should be seen on R4 learned via OSPF.
Task 3
Configure R3 so that traffic sourced from R4's Loopback 0 IP address destined to R2's Loopback
0 IP address will always use the path between R3 and R1. Use an ACL and route map named
"PBR" to achieve this task.

Correct Answer:
On R3, advertise Loopback0 directly into EIGRP so R2 learns it as an internal EIGRP route, configure OSPF Area 1 as NSSA and redistribute the loopback into OSPF, then use PBR inbound on the interface toward R4.
R3

R4

For Task 1, advertising R3's loopback directly under EIGRP makes it an internal EIGRP route, so R2 prefers it over the OSPF version without changing EIGRP administrative distance.
For Task 2, making Area 1 an NSSA allows redistributed routes to enter the area as Type 7 LSAs while preventing normal Type 5 LSAs from entering it. Redistributing R3's loopback into OSPF on R3 makes that route visible on R4 through OSPF.
For Task 3, PBR must be applied inbound on R3's interface that receives traffic from R4. The ACL matches traffic from R4 Loopback0 to R2 Loopback0, and the route map forces that traffic to use R1 as the next hop so it always takes the R3-R1 path.