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ISC Server 339
Sample DHCP Configuration File (continued)
subclass "BRANCH_CALLP" "3Com-VCX-7200-7.0.1c";
The previous line defines the vendor class identifier string sent by the VCX
server in the branch office when it sends a DHCP request. The string for
BRANCH_CALLP depends on the VCX software release. For example, a
VCX server running release 7.0.3c would use 3Com-VCX-7200-7.0.3c as
the vendor class identifier string.
subclass "GATEWAY" "Mediant-1000";
The previous line defines the vendor class identifier string sent by the
PSTN gateway. The string is the same regardless of whether the PSTN
gateway is a separate unit or is contained within the same box as the VCX
server.
subclass "PHONES" "3Com-Phone-2101";
subclass "PHONES" "3Com-Phone-2102";
subclass "PHONES" "3Com-Phone-3100";
subclass "PHONES" "3Com-Phone-3101";
subclass "PHONES" "3Com-Phone-3102";
subclass "PHONES" "3Com-Phone-3103";
The previous set of lines define vendor class identifier strings for 3Com
telephones. These strings are used by the match statement in each of the
class statements. This file includes a sample line for each possible
telephone type. In your dhcpd.conf file, include the lines for the
telephone types that are in the branch office.
option space phone-184;
The previous line creates an option space called phone-184. The name of
this option space is your choice. The space is intended to contain
vendor-specific options related to DHCP Option 184, as defined in RFC
2132.
option phone code 184 = encapsulate phone-184;
The previous line encapsulates all of the attributes of option 184 under
the name “phone-184.” There are three separate attributes associated
with option 184 and by encapsulating them, the attributes can be
delivered to DHCP clients (telephones) in a single package.
option phone-184.first_row code 1 = {ip-address};
The previous line defines option code 1 as an IP address. In this case the IP
address is for the branch office VCX server. Telephones in a branch office
normally obtain call processing services from this server.