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Configure ISC DHCP Server 643

match if option vendor-class-identifier =

4e:6f:72:74:65:6c:2d:69:32:30:30:34:2d:41:00;}

The Hex string represents the text string "Nortel-i2004-A".

If the vendor-class-identifier obtained from the client’s

DHCPDISCOVER message match this Hex-encoded string, then

the server adds this client to the "i2004-clients" class. Once a

client is classified as a member of a class, it must follow the

rules of the class.

2 Declare a pool of IP addresses exclusively for the members of

the "i2004-clients" class. The pool declaration is used to group

a range of IP addresses together with options and parameters

that apply only to the pool.

3 Restrict access to the pool. Use the allow or deny statement

to include or exclude the members of a particular class. For

example, the follow configuration code enables only members of

"i2004-clients" to use this IP address pool:

pool{

allow members of "i2004-clients";

range 47.147.75.60 47.147.75.65;

option routers 47.147.75.1;

# Nortel special string

option vendor-encapsulated-options

80:3d:4e:6f:72:É;}

If a client is not a member of this class, it is not assigned an IP

address from this pool, even if there were no other available IP

addresses.

4 The DHCPOFFER from the ISC server must include the Voice

Gateway Media Card information if the client is an IP Phone

2001, IP Phone 2002, IP Phone 2004, or IP Phone 2007. There

are two methods to encode the necessary information for the IP

Phone 2004 client:

a Use the vendor-encapsulated-options option (as in the

previous example) to encode the information as a sub option.

b Define a Site Specific option to carry the necessary

information. To define a site specific option:

• give a declaration in the form of the name of the option,

the option code, and the type of data it carries outside any

pool or network declarations. For example:

option Nortel-specific-info code 144 = string;

•

replace the vendor-encapsulated option inside the pool

statement with the definition,

option Nortel-specific-info = "Nortel É";

Nortel Communication Server 1000

IP Phones Fundamentals

NN43001-368 05.06 30 April 2010