Troubleshooting Connecting to Data Domain System over Network
This post describes how to identify and correct issues that might occur when connecting to the Data Domain system over a network.
Symptoms might include
- Cannot access the Data Domain system
- The Data Domain system is not seen on the network
Use the following steps to isolate the cause for the issue and identify the solution. Perform the steps in order. Do not skip a step.
- Verify the Data Domain system is available on the network. Test the basic network setting to see if the Data Domain system is on the network.
- Verify the Data Domain system network connectivity. Test the network connection to ensure the cables and network hardware are in place and working.
- Verify the DNS entries and settings are correct on the server and on the device. Incorrect DNS setting can prevent the Data Domain system from connecting to the network.
- Verify the host name is valid. The host name must resolve. An invalid host entry can prevent the Data Domain system from connecting to the network.
- Verify network connectivity is persistent and not intermittent. For example, a duplicate IP address can cause a connection to appear unavailable.
- Verify the terminal software is compatible. If using terminal software to connect to the Data Domain system, ensure the software is compatible and the correct emulator settings are configured.
- Verify the username and password are correct. Correct accounts and passwords are needed to connect the Data Domain system to the network.
- Verify the client is listed in access list on the Data Domain system. If the hostname or IP address of the connecting system is not present in the access list (ACL) this can prevent the Data Domain system from connecting to the network.