Dhcp Client Configuration Example; Network Requirements; Configuration Procedure - HP 830 Series Configuration Manual

DHCP client configuration example

Network requirements

As shown in
IP address, DNS server address, and static route information. The DHCP client IP address resides on
network 10.1.1.0/24. The DNS server address is 20.1.1.1. The next hop of the static route to network
20.1.1.0/24 is 10.1.1.2.
The DHCP server uses Option 121 to assign static route information to DHCP clients.
format of Option 121. The destination descriptor field comprises two parts, subnet mask length and
destination network address. In this example, the value of the destination descriptor field takes 18 14 01
01, a hexadecimal number indicating that the subnet mask length is 24 and destination network address
is 20.1.1.0, and the value of the next hop address field takes 0A 01 01 02, a hexadecimal number
indicating that the next hop is 10.1.1.2.
Figure 26 Option 121 format
Figure 27 Network diagram

Configuration procedure

Configure Switch A:
1.
# Specify the IP address of VLAN-interface 2.
<SwitchA> system-view
[SwitchA] interface vlan-interface 2
[SwitchA-Vlan-interface2] ip address 10.1.1.1 24
[SwitchA-Vlan-interface2] quit
# Enable the DHCP service.
[SwitchA] dhcp enable
# Exclude an IP address from automatic allocation.
[SwitchA] dhcp server forbidden-ip 10.1.1.2
# Configure DHCP address pool 0 and specify the subnet, lease duration, DNS server address,
and a static route to subnet 20.1.1.0/24.
Figure 27, on a LAN, Switch B contacts the DHCP server via VLAN-interface 2 to obtain an
51
Figure 26 shows the