What is a possible issue if a PC cannot communicate with another PC due to inter-VLAN routing configuration?

What is a possible issue if a PC cannot communicate with another PC due to inter-VLAN routing configuration?

• A. The VLAN is not configured correctly
• B. The encapsulation command contains the wrong VLAN
• C. Incorrect IP address assignments
• D. The router has insufficient bandwidth

Answer: (B)

The encapsulation command containing the wrong VLAN is a potential issue because inter-VLAN routing relies on proper VLAN tagging to ensure that the traffic between different VLANs is correctly identified and processed by the router. If the encapsulation command does not match the VLAN configuration, the router will not recognize the packets belonging to that VLAN, resulting in a failure to route the traffic between devices on different VLANs. Inter-VLAN routing involves the use of subinterfaces on the router, where each subinterface is associated with a specific VLAN ID. The encapsulation command is used to specify the VLAN ID for the traffic on that subinterface. When this configuration is incorrect, even if the VLANs themselves are set up properly on the switch, the router will not correctly route the packets, leading to communication issues between the PCs in different VLANs. Understanding the significance of VLAN encapsulation and its role in routing helps in diagnosing and fixing inter-VLAN communication problems effectively.

The encapsulation command containing the wrong VLAN is a potential issue because inter-VLAN routing relies on proper VLAN tagging to ensure that the traffic between different VLANs is correctly identified and processed by the router. If the encapsulation command does not match the VLAN configuration, the router will not recognize the packets belonging to that VLAN, resulting in a failure to route the traffic between devices on different VLANs.

Inter-VLAN routing involves the use of subinterfaces on the router, where each subinterface is associated with a specific VLAN ID. The encapsulation command is used to specify the VLAN ID for the traffic on that subinterface. When this configuration is incorrect, even if the VLANs themselves are set up properly on the switch, the router will not correctly route the packets, leading to communication issues between the PCs in different VLANs.

Understanding the significance of VLAN encapsulation and its role in routing helps in diagnosing and fixing inter-VLAN communication problems effectively.