H3C Technologies H3C S10500 Series Switches - Manual (Page 56)

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• Extend existing DHCP options. When the current DHCP options cannot meet the customers’
requirements (for example, you cannot use the dns-list command to configure more than eight DNS
server addresses), you can configure a self-defined option for extension.
Follow these steps to configure a self-defined DHCP option in the DHCP address pool:
To do… Use the command… Remarks
Enter system view system-view —
Enter DHCP address pool view
dhcp server ip-pool pool-name
[ extended ]
—
Configure a self-defined DHCP
option
option code { ascii ascii-string |
hex hex-string&<1-16> |
ip-address ip-address&<1-8> }
Required
No DHCP option is configured by
default.
Table 2 Description of common options
Option Option name Corresponding command Command parameter
3 Router Option gateway-list ip-address
6 Domain Name Server Option dns-list ip-address
15 Domain Name domain-name ascii
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NetBIOS over TCP/IP Name
Server Option
nbns-list ip-address
46
NetBIOS over TCP/IP Node Type
Option
netbios-type hex
66 TFTP server name tftp-server ascii
67 Bootfile name bootfile-name ascii
43 Vendor Specific Information — hex
Enabling DHCP
Enable DHCP before performing other configurations.
Follow these steps to enable DHCP:
To do… Use the command… Remarks
Enter system view system-view —
Enable DHCP dhcp enable
Required
Disabled by default.
Enabling the DHCP server on an interface
With the DHCP server enabled on an interface, upon receiving a client’s request, the DHCP server will
assign an IP address from its address pool to the DHCP client.
Follow these steps to enable the DHCP server on an interface: