Dhcp Option; Tech Support: 1.888.678.9427 - Comnet CWGE24MS2 Installation And Operation Manual

INSTALLATION AND OPERATION MANUAL

DHCP Option

Option 66/67
Introduction
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. 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 supply
"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:
Configurations:
» 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.

TECH SUPPORT: 1.888.678.9427

CWGE24MS2
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