Troubleshooting
Diagnostic Tools
Viewing the Current DNS Configuration
The show ip command displays the current DNS configuration along with
other IP configuration information. If the switch configuration currently
includes a non-default (non-null) DNS entry, it will also appear in the show run
command output.
ProCurve# show ip
Internet (IP) Service
IP Routing : Disabled
Default Gateway : 10.28.192.2
Default TTL : 64
Arp Age : 20
Domain Suffix : pubs.outdoors.com
DNS server : 10.28.229.10
DNS Resolver Configuration in the
show ip command output
VLAN | IP Config IP Address Subnet Mask
------------ + ---------- --------------- ---------------
DEFAULT_VLAN | Manual 10.28.192.1 255.255.255.0
Figure C-25. Example of Viewing the Current DNS Configuration
Operating Notes
â– The DNS server must be accessible to the switch, but it is not neces-
sary for any intermediate devices between the switch and the DNS
server to be configured to support DNS operation.
â– A DNS configuration must include the IP address for a DNS server
that is able to resolve host names for the desired domain. If a DNS
server has limited knowledge of other domains, then its ability to
resolve ping or traceroute requests is also limited.
â– If the DNS configuration includes a DNS server IP address but does
not also include a domain suffix, then any ping or traceroute
command should include the target host’s fully qualified domain
name. Refer to figure C-C-19 on page C-51.
â– The switch supports one DNS entry; that is, one DNS server IP address
and the corresponding domain name suffix.
C-56
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