Self-Defined Option Configuration Example - HP 4800G Series Configuration Manual

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[SwitchA-dhcp-pool-1] network 10.1.1.0 mask 255.255.255.128

[SwitchA-dhcp-pool-1] gateway-list 10.1.1.126

[SwitchA-dhcp-pool-1] expired day 10 hour 12

[SwitchA-dhcp-pool-1] nbns-list 10.1.1.4

[SwitchA-dhcp-pool-1] quit

# Configure DHCP address pool 2 (address range, gateway, and lease duration).

[SwitchA] dhcp server ip-pool 2

[SwitchA-dhcp-pool-2] network 10.1.1.128 mask 255.255.255.128

[SwitchA-dhcp-pool-2] expired day 5

[SwitchA-dhcp-pool-2] gateway-list 10.1.1.254

Self-Defined Option Configuration Example

Network requirements

DHCP server (Switch).

The IP address that the DHCP client obtains belongs to network segment 10.1.1.0/24.

The PXE server addresses that the DHCP client obtains are 1.2.3.4 and 2.2.2.2.

The DHCP server assigns PXE server addresses to DHCP clients through Option 43, a

self-defined option. The format of Option 43 and that of the PXE server address list are shown in

this example is 80 0B 00 00 02 01 02 03 04 02 02 02 02. The number 80 is the value of the

sub-option type. The number 0B is the value of the sub-option length. The numbers 00 00 are the

value of the PXE server type. The number 02 indicates the number of servers. The numbers 01 02

03 04 02 02 02 02 indicate that the PXE server addresses are 1.2.3.4 and 2.2.2.2.

Figure 2-3 Network diagram for self-defined option configuration

Configuration procedure

Specify IP addresses for the interfaces (omitted).

Configure the DHCP server

# Enable DHCP.

<Switch> system-view

[Switch] dhcp enable

# Configure DHCP address pool 0.

[Switch] dhcp server ip-pool 0

[Switch-dhcp-pool-0] network 10.1.1.0 mask 255.255.255.0

[Switch-dhcp-pool-0] option 43 hex 80 0B 00 00 02 01 02 03 04 02 02 02 02

2-3, the DHCP client obtains an IP address and PXE server addresses from the

1-7, respectively. The value of Option 43 configured on the DHCP server in

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