XGS-5240-Series User Manual

Configuration Guide of XGS-5240-Series
69-6
69.4 DNS Troubleshooting
In configuring and using DNS, the DNS may fail due to reasons such as physical
connection failure or wrong configurations. The user should ensure the following:
 First make sure good condition of the TACACS+ server physical connection;
 Second all interface and link protocols are in the UP state (use “show interface”
command);
 Then please make sure that the DNS dynamic lookup function is enabled (use the
“ip domain-lookup” command) before enabling the DNS CLIENT function. To use
DNS SERVER function, please enable it (use the “ip dns server” command);
 Finally ensure configured DNS server address (use “dns-server” command), and th
e switch can ping DNS server;
 If the DNS problems remain unsolved, please use debug DNS all and other debug
ging command and copy the DEBUG message within 3 minutes, send the recorde
d message to the technical service center of our company.