3com 4210 PWR 9-Port 3CR17341-91-ME User Manual
Product codes
3CR17341-91-ME
554
C
HAPTER
48: DNS C
ONFIGURATION
Reply from 3.1.1.1: bytes=56 Sequence=2 ttl=255 time=1 ms
Reply from 3.1.1.1: bytes=56 Sequence=3 ttl=255 time=1 ms
Reply from 3.1.1.1: bytes=56 Sequence=4 ttl=255 time=1 ms
Reply from 3.1.1.1: bytes=56 Sequence=5 ttl=255 time=1 ms
--- 3.1.1.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/1/3 ms
--- host.com ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss
Troubleshooting DNS
Symptom
After enabling the dynamic domain name resolution, the user cannot get the
correct IP address.
correct IP address.
Solution
■
Use the display dns dynamic-host command to check that the specified
domain name is in the cache.
domain name is in the cache.
■
If there is no defined domain name, check that dynamic domain name
resolution is enabled and the DNS client can communicate with the DNS server.
resolution is enabled and the DNS client can communicate with the DNS server.
■
If the specified domain name exists in the cache but the IP address is incorrect,
check that the DNS client has the correct IP address of the DNS server.
check that the DNS client has the correct IP address of the DNS server.
■
Check that the mapping between the domain name and IP address is correct
on the DNS server.
on the DNS server.