3Com Switch 8800 Configuration Guide Chapter 14 DNS Configuration14-5III. Configuraiton procedureEnable dynamic domain name resolution[SW8800] dns resolveConfigure the IP address of the domain name server to 172.16.1.1.[SW8800] dns server 172.16.1.1Configure the domain name suffix as com.[SW8800] dns domain comPing a host with the specified domain name.[SW8800] ping ftpTrying DNS server (172.16.1.1)PING ftp.com (200.200.200.200): 56 data bytes, press CTRL_C to breakReply from 200.200.200.200: bytes=56 Sequence=1 ttl=128 time=2 msReply from 200.200.200.200: bytes=56 Sequence=2 ttl=128 time=2 msReply from 200.200.200.200: bytes=56 Sequence=3 ttl=128 time=2 msReply from 200.200.200.200: bytes=56 Sequence=4 ttl=128 time=2 msReply from 200.200.200.200: bytes=56 Sequence=5 ttl=128 time=2 ms--- ftp.com ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 2/2/2 msThe routing configuration between the switch and the domain name sever is omittedhere, and refer to the related chapter for the configuration.14.6 Troubleshooting Domain Name ResolutionConfigurationFault: Domain name resolution fails.Troubleshoot: Perform the following procedures:z Check whether the domain name resolution function is enabled.z Check whether the IP address of the domain name sever is correctly configured.z Check whether there is a correct route between the domain name sever and theswitch.z Check whether there is network connection failure, such as network cable break,loose connection, and so on.
