Specifying A Dhcp Client Identifier - LevelOne GEL-1061 User Manual

Chapter 16
| IP Services
Dynamic Host Configuration Protocol
Specifying a DHCP
Client Identifier
Use the IP Service > DHCP > Client page to specify the DHCP client identifier for a
VLAN interface.
Command Usage
◆
The class identifier is used identify the vendor class and configuration of the
switch to the DHCP server, which then uses this information to decide on how
to service the client or the type of information to return.
◆
The general framework for this DHCP option is set out in RFC 2132 (Option 60).
This information is used to convey configuration settings or other identification
information about a client, but the specific string to use should be supplied by
your service provider or network administrator. Options 60, 66 and 67
statements can be added to the server daemon's configuration file.
Table 30: Options 60, 66 and 67 Statements
Option
Keyword
60 vendor-class-identifier
66 tftp-server-name
67 bootfile-name
◆
By default, DHCP option 66/67 parameters are not carried in a DHCP server
reply. To ask for a DHCP reply with option 66/67 information, the DHCP client
request sent by this switch includes a "parameter request list" asking for this
information. Besides, the client request also includes a "vendor class identifier"
that allows the DHCP server to identify the device, and select the appropriate
configuration file for download. This information is included in Option 55 and
124.
Table 31: Options 55 and 124 Statements
Option
Keyword
55 dhcp-parameter-request-list
124 vendor-class-identifier
◆
The server should reply with the TFTP server name and boot file name.
◆
Note that the vendor class identifier can be formatted in either text or
hexadecimal, but the format used by both the client and server must be the
same.
Parameters
These parameters are displayed:
◆
VLAN – ID of configured VLAN.
Statement
Parameter
a string indicating the vendor class identifier
a string indicating the tftp server name
a string indicating the bootfile name
Statement
Parameter
a list of parameters, separated by ' , '
a string indicating the vendor class identifier
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