3com S7906E Manuel De Montage

 

1-10 

# Specify the DNS server 2.1.1.2. 

[SwitchB] dns server 2.1.1.2 

4) Configuration 

verification 

# Execute the ping host.com command on Switch B to verify that the communication between the 

Switch and the host is normal and that the corresponding destination IP address is 3.1.1.1. 

[SwitchB] ping host.com 

Trying DNS resolve, press CTRL_C to break 

 Trying DNS server (2.1.1.2) 

  PING host.com (3.1.1.1): 

  56  data bytes, press CTRL_C to break 

    Reply from 3.1.1.1: bytes=56 Sequence=1 ttl=126 time=3 ms 

    Reply from 3.1.1.1: bytes=56 Sequence=2 ttl=126 time=1 ms 

    Reply from 3.1.1.1: bytes=56 Sequence=3 ttl=126 time=1 ms 

    Reply from 3.1.1.1: bytes=56 Sequence=4 ttl=126 time=1 ms 

    Reply from 3.1.1.1: bytes=56 Sequence=5 ttl=126 time=1 ms 

 

  --- host.com ping statistics --- 

    5 packet(s) transmitted 

    5 packet(s) received 

    0.00% packet loss 

    round-trip min/avg/max = 1/1/3 ms 

After enabling the dynamic domain name resolution, the user cannot get the correct IP address. 

z 

Use the display dns dynamic-host command to verify that the specified domain name is in the 

cache. 

z 

If the specified domain name does not exist, check that dynamic domain name resolution is 

enabled and the DNS client can communicate with the DNS server. 

z 

If the specified domain name is in the cache, but the IP address is incorrect, check that the DNS 

client has the correct IP address of the DNS server. 

z 

Verify the mapping between the domain name and IP address is correct on the DNS server.