Table 26. DM5500 Configuration UI error messages(continued)
Error code Error message Troubleshooting steps
CONN0137 Connection timed out for DNS server
<DNS_server_IP>.
● Check DNS server firewall rules for port 53.
● Click Back and re-submit the configuration.
● If the issue persists, contact Customer Support.
CONN0139 DNS validation failed. Reverse lookup
entries
a
for IP <Management_IP>
do not match. Primary DNS
<DNS_server_IP_x> has reverse lookup
entry
a
as <reverse_lookup_of_IP_x>,
and secondary DNS <DNS_server_IP_y>
has reverse lookup entry
a
as
<reverse_lookup_of_IP_y>.
● Ensure primary and secondary DNS servers have same
lookup entries.
● Click Back and re-submit the configuration.
● If the issue persists, contact Customer Support.
CONN0142 Time difference <integer_value>
between <NTP_server> and <operating
environment> exceeded the maximum
allowed difference of 600 seconds.
● Ensure that the correct time is set on the NTP server.
● Click Back and re-submit the configuration.
● If the issue persists, contact Customer Support.
CONN0149 Destination subnet IP <IP_x> does not match
with its network IP <IP_y> .
● Enter the appropriate subnet for your network.
● If the issue persists, contact Customer Support.
CONN0157 IP <IP> is supposed to be free but it is
detected in use.
● Enter an IP address that is not in use.
● If the issue persists, contact Customer Support.
CONN0158 Management IP <IP_x> resolution <IP_y>
does not not match with given Management
FQDN <Management_FQDN>.
● Provide correct FQDN entry in the input field.
● If the issue persists, contact Customer Support.
CONN0159 Given Management FQDN
<Management_FQDN> does not ends with
domain name <domain_name>.
● Provide correct FQDN and domain name in the input field.
● If the issue persists, contact Customer Support.
CONN0161 IP <IP> is supposed to be free but it is
detected in use.
● Enter an IP address that is not in use.
● If the issue persists, contact Customer Support.
CONN0163 Failed to validate if network is already in use.
● Ensure the network is not already added.
● Once the problem is resolved, add the configuration again.
● If the issue persists, contact Customer Support.
CONN0164 Unable to reach to NTP server
<NTP_server_IP>.
● Check if the NTP server is reachable
● Check if NTP services are running on the NTP server.
● Check the firewall rules.
● Click Back and re-submit the configuration.
● If the issue persists, contact Customer Support.
a.
Reverse DNS lookup uses an IP address to find a domain name. Forward DNS lookup uses a domain name to find an IP
address.
68 Troubleshooting
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