Inter-VLAN routing is a process that allows devices on different VLANs to communicate with each other. It is an important part of configuring and managing networks, but it can also be a source of frustration if it is not working correctly. In order to ensure that your inter-VLAN routing is functioning properly, it is important to understand the common causes of issues and to identify ways to troubleshoot them.
Common Causes of Inter-VLAN Routing Issues
There are a few common causes that can lead to issues with inter-VLAN routing. One of the most common is a misconfigured or incorrectly assigned IP address. If the IP address is assigned to the wrong VLAN or is not in the proper subnet, then it will not be able to communicate with other devices on the network.
Another common cause of inter-VLAN routing issues is incorrect or missing routing protocols. Depending on the size and complexity of the network, different routing protocols may be needed in order to properly route traffic between VLANs. If the wrong routing protocols are configured or there are missing protocols, then the network will be unable to properly route traffic between VLANs.
The last common cause of inter-VLAN routing issues is a physical problem with the network. If the cabling is incorrect or there is a physical problem with the network equipment, then it will be impossible to route traffic between VLANs.
Troubleshooting Inter-VLAN Routing
In order to properly diagnose and fix inter-VLAN routing issues, it is important to understand the causes listed above and to identify ways to test and troubleshoot them. The first step is to ensure that the IP address is properly configured and that it is in the proper subnet. This can be done by using the “ping” command to test the connectivity between the two IP addresses. If the ping fails, then it is likely that the IP address is not properly configured.
The next step is to ensure that the correct routing protocols are configured and that they are correctly configured. This can be done by using the “show ip route” command to view the routing table and verify that the desired routes are present.
The final step is to verify that the network infrastructure is functioning properly. This can be done by checking the cabling and the physical port
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