Troubleshooting Ipv4 Dns Configuration; Symptom; Solution; Troubleshooting Ipv6 Dns Configuration - H3C MSR 2600 Configuration Manual

Verifying the configuration
# Use the ping ipv6 host.com command on Device B to verify that the connection between the device and
the host is normal and that the translated destination IP address is 3000::1.
[DeviceB] ping ipv6 host.com
Ping6(56 data bytes) 2000::1 --> 3000::1, press escape sequence to break
56 bytes from 3000::1, icmp_seq=0 hlim=128 time=1.000 ms
56 bytes from 3000::1, icmp_seq=1 hlim=128 time=0.000 ms
56 bytes from 3000::1, icmp_seq=2 hlim=128 time=1.000 ms
56 bytes from 3000::1, icmp_seq=3 hlim=128 time=1.000 ms
56 bytes from 3000::1, icmp_seq=4 hlim=128 time=0.000 ms
--- Ping6 statistics for host.com ---
5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.000/0.600/1.000/0.490 ms

Troubleshooting IPv4 DNS configuration

Symptom

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

Solution

1. Use the display dns host ip command to verify that the specified domain name is in the cache.
2. If the specified domain name does not exist, check that the DNS client can communicate with the
DNS server.
3. 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.
4. Verify that the mapping between the domain name and IP address is correct on the DNS server.

Troubleshooting IPv6 DNS configuration

Symptom
After enabling dynamic domain name resolution, the user cannot get the correct IPv6 address.
Solution
1. Use the display dns host ipv6 command to verify that the specified domain name is in the cache.
2. If the specified domain name does not exist, check that dynamic domain name resolution is
enabled, and that the DNS client can communicate with the DNS server.
3. If the specified domain name is in the cache, but the IPv6 address is incorrect, check that the DNS
client has the correct IPv6 address of the DNS server.
4. Verify that the mapping between the domain name and IPv6 address is correct on the DNS server.
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