Symptoms
The following is an alert created by the Data Domain Operating System (DDOS):
Current Alerts
--------------
Id Post Time Severity Class Object Message
-- ------------------------ -------- ------- ------ ----------------------------------------------------------
30 Tue Nov 25 15:46:53 2014 CRITICAL Network EVT-NETM-00009: Unable to communicate with configured DNS.
-- ------------------------ -------- ------- ------ ----------------------------------------------------------
Cause
In DDOS 5.5, a new feature was introduced to check on the functionality of the configured DNS. This feature attempts to resolve the domain "emc.com." If the name is not resolvable, the alert is posted.
Note: Starting with DDOS 7.10, the Data Domain looks for "dell.com" automatically.
Also note: The name the name is admin user configurable in DD OS 7.10+.
Resolution
Ensure that the DNS configuration can resolve the domain emc.com.
- To test the resolution, from the Command-Line Interface (CLI) interface, run:
# net lookup emc.com
Note: Starting with DD OS 7.10, the Data Domain looks for "dell.com" automatically.
- To check for the configured DNS address on the CLI, run:
# net show dns
- To correct the DNS entry, run:
# net set dns
Example: net set dns 10.10.10.10,10.10.10.11
- To check if the name is resolvable:
# net lookup <Name or IP that you are looking up>
- Starting in DD OS 7.10+: To change the name that the Data Domain looks for: (Ensure that this name is resolvable by your configured DNS server)
# reg set config.net.dns_domain_name=<Your resolvable name here>
Example: reg set config.net.dns_domain_name = anycomp.com
Additional Information
If the Data Domain is in a controlled environment where DNS is not used or only internal hostnames are resolved, see Dell article 81545,
Data Domain: EVT-NETM-00009: Unable to communicate with configured DNS to see if it is applicable.
Data Domain, Data Domain, Data Domain Boost – File System, Data Domain Boost - Open Storage, Data Domain Deduplication Storage Systems, DD Boost for Enterprise Applications, DD OS, DD OS Licensed Features