Steps for verifying network interface operation

Determine whether a particular network interface is ready.

About this task

Figure 1 shows the decisions involved for verifying network interface operation.

Figure 1. Overview of verifying network interface operation

Perform the following steps to verify network interface operation:

1. Use the Netstat DEVLINKS/-d command to check the interface status. If the interface status is Ready, check the physical connectivity from the interface to the network and check for configuration errors in the network. For example, if you are using VLAN, verify that you have configured the proper VLAN IDs throughout the network. If the interface status is not Ready, try to start the interface by using the VARY TCPIP,,START command, and proceed to 2.
2. Use the Netstat DEVLINKS/-d command again to determine whether the interface is ready after being started. If the interface is not ready, check the system console for error messages issued from TCP/IP, VTAM®, or IOS and respond as suggested in the documentation for the messages that appear.