Avaya Cajun P882 User Manual page 276

Chapter 8
Order of
Operations for
DNS on the
Avaya
Multiservice
Switch
8-4
The following DNS Client features are supported:
The DNS Client on the Avaya Multiservice switch is Stub
Resolver (i.e. it does not support Iteration). This means that
referral answers will be discarded. A Recursive DNS server must
be used if you intend on using FQDN for which the configured
DNS servers do not have resource records.
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
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.
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1