R211x-HP Flexfabric 11900 Layer 3 - IP Services Command Reference
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ascii ascii-string: Specifies an ASCII string of 1 to 255 characters as the option content.
hex hex-string: Specifies a hex string of even numbers from 2 to 256 as the option content.
ip-address ip-address&<1-8>: Specifies the IP addresses as the option content. &<1-8> indicates that you
can specify up to eight IP addresses separated by spaces.
Usage guidelines
The DHCP server fills the customized option with the specified ASCII string, hex string, or IP addresses,
and sends it in a response to the client.
If you use the option command with the same code specified, the most recent configuration takes effect.
You can customize options for the following purposes:
• Add newly released options.
• Add options for which the vendor defines the contents, for example, Option 43.
• Add options for which the CLI does not provide a dedicated configuration command. For example,
you can use the option 4 ip-address 1.1.1.1 command to define the time server address 1.1.1.1 f o r
DHCP clients.
• Add all option values if the actual requirement exceeds the limit for a dedicated option
configuration command. For example, the dns-list command can specify up to eight DNS servers.
To specify more than eight DNS server, you must use the option 6 command to define all DNS
servers.
If a DHCP option is specified by both the dedicated command and the option command, the DHCP
server assigns the content specified by the dedicated command. For example, if a DNS server address
is specified by the dns-list command and the option 6 command, the server uses the address specified
by dns-list command.
Examples
# Configure Option 7 to specify the log server address 2.2.2.2 in address pool 0.
<Sysname> system-view
[Sysname] dhcp server ip-pool 0
[Sysname-dhcp-pool-0] option 7 ip-address 2.2.2.2
Related commands
display dhcp server pool
reset dhcp server conflict
Use reset dhcp server conflict to clear IP address conflict information.
Syntax
reset dhcp server conflict [ ip ip-address ]
Views
User view
Predefined user roles
network-admin
mdc-admin