H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – DHCP
H3C S7500E Series Ethernet Switches Chapter 2 DHCP Server Configuration
2-13
To do… Use the command… Remarks
Specify the bootfile
name
bootfile-name
bootfile-name
Optional
Not specified by default.
2.5.11 Configuring Self-Defined DHCP Options
By configuring self-defined DHCP options, you can
z Define new DHCP options. New configuration options will come out with DHCP
development. To support these new options, you can add them into the attribute
list of the DHCP server.
z Define existing DHCP options. Some options have no unified definitions in RFC
2132; however, vendors can define such options as needed. The self-defined
DHCP option enables DHCP clients to obtain vendor-specific information.
z 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
—
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 2-1 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
44
NetBIOS over TCP/IP
Name Server Option
nbns-list ip-address
46
NetBIOS over TCP/IP
Node Type Option
netbios-type hex
51 IP Address Lease Time
expired hex