LevelOne GEL-5261, User Manual

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Chapter 18
| 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 34: Options 60, 66 and 67 Statements
60 vendor-class-identifier a string indicating the vendor class identifier
66 tftp-server-name a string indicating the tftp server name
67 bootfile-name a string indicating the 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 35: Options 55 and 124 Statements
55 dhcp-parameter-request-list a list of parameters, separated by ','
124 vendor-class-identifier a string indicating the 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.