Dhcp Options; Option 66 And 67 - Tripp Lite NGI-M08C4POE8-2 Owner's Manual

6.4 DHCP Options

6.4.1 Option 66 and 67

The Dynamic Host Configuration Protocol (DHCP) is used by device for requesting Internet
Protocol parameters, such as an IP address from a network server. The protocol operates based
on the client-server model.
When the Switch connects to a network, its DHCP client software in the operating system sends
a broadcast query requesting necessary information like IP address. Any DHCP server on the
network may service the request. The DHCP server manages a pool of IP addresses and
information about client configuration parameters such as default gateway, domain name, the
name servers, and time servers, and "DHCP option 66 and 67".
DHCP option 66 is used to identify a TFTP server when the "TFTP server name" field in the
DHCP header has been used for DHCP options. DHCP option 67 is used to identify a TFTP
server when the "file name" field in the DHCP header has been used for DHCP options. If DHCP
server supplys "DHCP option 66 and 67" then the user can set it. When the switch connects to a
network, the switch will get DHCP option 66 and 67's information from DHCP sever. The user
can put the configure file on the TFTP server. The Switch will download configure file from
TFTP server automatically and it will take effect the configuration file immediately.
The procedures to use the DHCP option 66 and 67
Set DHCP option 66 and 67's information on the DHCP server as below:

DHCP option 66: 192.168.202.102
DHCP option 67: vcmsh_config.save
Put configuration file"vcmsh_config.save" in TFTP server.

Enable DHCP option 66 and 67 on the Switch.

Enable DHCP client on the Switch.

When the Switch gets an IP from DHCP server, the DHCP server also gives the option

66's and 67's information to the Switch.
132