Advanced Operational Features
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If all three servers with priority 10 are unavailable, the next highest priority record is selected, in this case backupbox. This
could be a server in another physical location.
The server entries in the
aastra.cfg
file can use DNS hostnames or can use IP addresses. If hostnames are used, any pre-
cached DNS A records via the host file mechanism are used before resorting to live DNS query if there is no local match.
For example, the following hostfile.text uses IP addresses that are used in the DNS server queries:
hostfile.txt
192.168.2.3 bigbox.example.com
192.168.3.4 smallbox1.example.com
192.168.8.1 smallbox2.example.com
47.28.05.69 backupbox.example.com
Use the following procedure in the configuration files to configure DNS server query support for the phones.
Use the following procedure to configure DNS SRV record pre-caching.
Configuration Files
For the specific parameter you can set in the configuration files, see Appendix A, the section,
on