Examine the following diagram:What commands should you run to ensure that routing updates are getting to Router A from Router D? (Choose all that apply.)

Last Updated on July 31, 2021 by Admin 1

1. Examine the following diagram:

   

   Routing updates are not being received on Router A from Router D. The partial output of the show run command for Router B and Router C is shown below:

   

   What commands should you run to ensure that routing updates are getting to Router A from Router D? (Choose all that apply.)

   • routerC(config-router)# area 1 virtual-link 2.2.2.2

   • routerC(config-router)# no area 1 virtual-link 4.4.4.4
     
     routerC(config-router)# area 0 virtual-link 2.2.2.2

   • routerB(config-router)# area 0 virtual-link 3.3.3.3

   • routerB(config-router)# area 1 virtual-link 3.3.3.3

   • routerC(config-router)# no area 1 virtual-link 4.4.4.4
     
     routerC(config-router)# area 1 virtual-link 2.2.2.2

   • routerB(config-router)# area 1 virtual-link 4.4.4.4

   • routerB(config-router)# no area 1 virtual-link 4.4.4.4

   Explanation:
   The problem is that the virtual link that provides a connection from area 2 to area 0 is misconfigured on Router C, and is missing entirely from Router B. The current configuration on Router C uses the router ID 4.4.4.4 in the virtual link statement, but the neighbor that is on the other end of the link (Router B) has an ID of 2.2.2.2. Therefore, you must remove the incorrect statement with this command:

   routerC(config-router)# no area 1 virtual-link 4.4.4.4

   Then, you would recreate it correctly with the following command:

   routerC(config-router)# area 1 virtual-link 2.2.2.2

   The configuration of the virtual link on Router B is missing completely. To add it, you would use the area 1 virtual-link command and configure the neighbor as Router C at 3.3.3.3:

   routerB(config-router)# area 1 virtual-link 3.3.3.3

   You should not run the following command on Router C:

   routerC(config-router)# area 1 virtual-link 2.2.2.2

   This would apply a correct statement, but leave in the incorrect statement.

   You should not run any of the following sets of commands:

   routerC(config-router)# no area 1 virtual-link 4.4.4.4
   routerC(config-router)# area 0 virtual-link 2.2.2.2

   or

   routerB(config-router)# area 0 virtual-link 3.3.3.3

   These commands all incorrectly include the area 0 syntax. The area in the command should be the area being transited to get to area 0, which is area 1.

   You should not run the routerB(config-router)# area 1 virtual-link 4.4.4.4 command on Router B. This command uses an incorrect router ID. The neighbor for Router B should be Router C, 3.3.3.3

   You should not run the routerB(config-router)# no area 1 virtual-link 4.4.4.4 command on Router B. There is no virtual link to remove from Router B.

   Objective:
   Layer 3 Technologies
   Sub-Objective:
   Configure and verify network types, area types, and router types