SIMULATION
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 pre-configurations 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
R21 through R25 are routers that perform MPLS label-forwarding operations. Candidates are required to perform the below configuration and verification tasks as noted.
1. Configure R22 and R23 to discover each other as LDP-speaking routers on the connected link.
2. Ensure the logical interface is selected as the persistent identifier on both R22 and R23.
3. Modify R21 and R25 to enable the MPLS-TE tunnel to be signaled and up between them.
Initial configuration with IP addressing has been completed.
The candidate must not make any changes to the configurations except to fulfill the tasks listed above. Only use the provided logical interface for the applicable task.
*The candidates have console access to all the routers R21, R22, R23, R24 and R 25.