A router-on-a-stick configuration will not allow PC1 on VLAN 10 to communicate with PC2 on VLAN 11. Which two of the following could be the problem? (Choose two.)

A router-on-a-stick configuration will not allow PC1 on VLAN 10 to communicate with PC2 on VLAN 11. Which two of the following could be the problem? (Choose two.)

• The physical port on the router is shut down.
• The switch SVI is not “up and up.”
• The port between the switch and the router is not a routed port.
• The port between the switch and the router has been placed in access mode.
• One or both of the router subinterfaces have been configured with an IP address in a different network.

Explanation: Common problems in a router on-a-stick configuration include the physical port on the router being shut down, native VLAN mismatch between the router and the switch, and improper IP addressing to match the VLAN. Remember that each VLAN must have a different network number. On the switch side, ensure VLANs 10 and 11 are in the VLAN database, ensure the port connecting to the router is a trunk, and ensure the native VLAN matches the configured native VLAN on the router (or is the default of 1).

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