Cisco 7800 Series Administration Manual page 63

Cisco IP Phone Installation
Entry Type
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
Default
IPv4 Fields
Description
Optional backup TFTP server
that the phone uses if the
primary TFTP server is
unavailable.
If neither the primary TFTP
server nor the backup TFTP
server is listed in the CTL or
ITL file on the phone, you must
unlock either of the files before
you can save changes to the
TFTP Server 2 option. In this
case, the phone deletes either of
the files when you save changes
to the TFTP Server 2 option. A
new CTL or ITL file downloads
from the new TFTP Server 2
address.
If you forget to unlock the CTL
or ITL file, you can change the
TFTP Server 2 address in either
file, then erase them by pressing
Erase from the Security
Configuration menu. A new
CTL or ITL file downloads from
the new TFTP Server 2 address.
When the phone looks for the
TFTP server, it gives
precedence to manually
assigned TFTP servers,
regardless of the protocol. If
your configuration includes both
IPv6 and IPv4 TFTP servers, the
phone prioritizes the order that
it looks for the TFTP server by
giving priority to manually
assigned IPv6 TFTP servers and
IPv4 TFTP servers. The phone
looks for the TFTP server in the
following order:
1. Any manually assigned
IPv4 TFTP servers
2. Any manually assigned
IPv6 servers
3. DHCP assigned TFTP
servers
4. DHCPv6 assigned TFTP
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