Avaya Cajun P580, User Manual, Page: 312 / 770

11-4 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.0
Chapter 11
■
Up to six DNS name servers can be configured.
■
Up to six default DNS Domain Suffixes can be configured.
■
When DNS is enabled, DNS names can be used in place of IP
addresses for
ping
,
telnet
,
connect, traceroute and
copy tftp
CLI commands.
■
The DNS client name can consist of up to 255 characters.
■
A single label within a DNS client name can consist of 63
characters.
Once enabled, you have the option of specifying a DNS suffix to add to
unqualified host names. If so, you need only type the host name, in place of
the IP address, without the suffix when entering commands. The suffix will
be appended to host names that have no suffix.
For example: You can specify the avaya.com suffix. So when you want to
ping hostA in the avaya.com domain, you need only type the host name
without the suffix.
Avaya(configure)# ping hostA
instead of:
Avaya(Configure)# ping hostA.avaya.com
Order of
Operations for
DNS on the Avaya
Multiservice
Switch
You can configure up to six DNS servers and up to six DNS suffixes. When
you use a name instead of an IP address in a command, the Avaya
Multiservice switch will first check to see if the name is a fully qualified
domain name (ex: hostA.avaya.com). If it is, this will be sent to the first
DNS server in the list of servers.
If it is not a fully qualified domain name (ex: just hostA) and a suffix(es)
has been specified, the first suffix will be appended to the name; and then
sent to the DNS server. If no suffix(es) is configured, it will be sent as is for
resolution.
If the server cannot resolve the name, the Avaya Multiservice switch will
use the same method with the second configured suffix. Once it has
exhausted the configured DNS suffixes, it will attempt the query with the
second DNS server.