B. Configuration Files
65
B.4.2.1
Mandatory Parameter Settings
Although the default values for the following parameters may be set properly for your network
configuration, it is highly recommended that the configuration files explicitly set the values for
these parameters.
IF0DHCP:
When DHCP is enabled, the DHCP server should dynamically provide an IP address
and subnet mask for the phone along with IP addresses for the DNS servers, default gateway,
NTP server, and TFTP server.
If DHCP is not enabled, or if the DHCP server is unable to return addresses for any of these
servers, you must specify valid IP addresses for each server or the phone will not properly
configure on startup.
TFTPSERVER:
This parameter may be used to override the local DHCP specified Option 66 TFTP
server. Many firewalls and NATs incorrectly supply this option in a non-configurable manner,
which prevents remote management of phones through a VPN. Specifying this parameter
overrides the locally supplied TFTP server and directs the phone to the central management
TFTP server at the company headquarters. This option can be ignored on a local LAN-only
deployment.
B.4.2.2
Sample Configuration File
Figure B-5 displays the Network Configuration section from a sample configuration file.
IF0IPGATEWAY
Parameter is IP address of default gateway
that is used for manual configuration when
IF0DHCP is set to ‘FIXED’ or DHCP does not
provide the default gateway (DHCP option 3).
Valid setting is an IP address in dotted
decimal notation.
Default value is an empty string.
3.35
IF0IPNETMASK
Parameter is Subnet mask that is used for
manual configuration of the phone when
IF0DHCP is set to ‘FIXED’ or DHCP does not
return mask (DHCP option 1). Valid setting is
an IP netmask in dotted decimal notation.
Default value is an empty string.
3.35
TFTPSERVER
IP address of TFTP server. Parameter used
only if IF0DHCP is set to ‘FIXED’ or DHCP
does not return a TFTP server (DHCP option
66). Parameter value is an IP address in dotted
decimal notation.
Default value is an empty string.
3.38
Parameter
Description
Equivalent
web interface
parameter
Version
Introduced
Figure B-4
Network Configuration Parameters (Continued)
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