Version 6.2 275 February 2011
SIP User's Manual 3. Web-Based Management
h. Option 66 - TFTP Server Name: This option is used to identify a TFTP server.
i. Option 67 - Boot File Name: This option is used to identify the boot file name.
j. Option 2 - Time offset: Specifies the offset of the client's subnet in seconds from
Coordinated Universal Time (UTC). The offset is expressed as a two's
complement 32-bit integer. A positive offset indicates a location east of the zero
meridian and a negative offset indicates a location west of the zero meridian. The
code for the time offset option is 2, and its length is 4 octets.
k. Option 42 - NTP server: Network Time Protocol (NTP) Servers option specifies
a list of IP addresses indicating NTP servers available to the client. Servers
should be listed in order of preference. The code for this option is 42. Its
minimum length is 4, and the length must be a multiple of 4.
l. Option 150 - TFTP server: DHCP option (RFC 2132) contains one or more IPv4
addresses that the client may use. The current use of this option is for
downloading configuration from a VoIP server via TFTP; however, the option may
be used for purposes other than contacting a VoIP configuration server.
m. Click OK to save the settings.
5. If you selected 'DHCP Relay', the following appears:
Figure 3-190: Defining DHCP Relay (DHCP for LAN Bridge)
a. Click the New IP Address link; the following page appears:
Figure 3-191: Defining DHCP Server's IP Address
b. In the 'IP Address' field, enter the IP address of the DHCP server.
c. Click OK to save the settings, and then click OK again.
d. You now need to configure the WAN to operate in routing mode, which is
necessary for DHCP relay:
a. Click the Connections item (Configuration tab > Data Settings menu >
Data System > Connections).
b. Click the Edit
icon corresponding to the 'WAN Ethernet' connection.
c. Select the Routing tab and then from the 'Routing Mode' drop-down list,
select 'Route'.
d. Click OK to save the settings.
You can also view a list of computers currently recognized by the DHCP server:
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