HPE FlexNetwork 10500 Series Configuration Manual page 74

Configure two subnets in the address pool on the DHCP server: 10.1.1.0/24 as the primary subnet
and 10.1.2.0/24 as the secondary subnet. The DHCP server selects IP addresses from the
secondary subnet when the primary subnet has no assignable addresses.
Switch A assigns the following parameters:
•
The default gateway 10.1.1.254/24 to clients on subnet 10.1.1.0/24.
•
The default gateway 10.1.2.254/24 to clients on subnet 10.1.2.0/24.
Figure 24 Network diagram
DHCP client
Configuration procedure
# Enable DHCP.
<SwitchA> system-view
[SwitchA] dhcp enable
# Configure the primary and secondary IP addresses of VLAN-interface 10.
[SwitchA] interface vlan-interface 10
[SwitchA-Vlan-interface10] ip address 10.1.1.1 24
[SwitchA-Vlan-interface10] ip address 10.1.2.1 24 sub
# Enable the DHCP server on VLAN-interface 10.
[SwitchA-Vlan-interface10] dhcp select server
[SwitchA-Vlan-interface10] quit
# Create DHCP address pool aa.
[SwitchA] dhcp server ip-pool aa
# Specify the primary subnet and the gateway address for dynamic allocation.
[SwitchA-dhcp-pool-aa] network 10.1.1.0 mask 255.255.255.0
[SwitchA-dhcp-pool-aa] gateway-list 10.1.1.254
# Specify the secondary subnet and the gateway address for dynamic allocation.
[SwitchA-dhcp-pool-aa] network 10.1.2.0 mask 255.255.255.0 secondary
[SwitchA-dhcp-pool-aa-secondary] gateway-list 10.1.2.254
[SwitchA-dhcp-pool-aa-secondary] quit
[SwitchA-dhcp-pool-aa] quit
Verifying the configuration
# Verify that the DHCP server assigns clients IP addresses and gateway address from the secondary
subnet when no address is available from the primary subnet. (Details not shown.)
# Display the primary and secondary subnet IP addresses the DHCP server has assigned. The
following is part of the command output.
[SwitchA] display dhcp server ip-in-use
Switch A
DHCP server
Vlan-int10
10.1.1.1/24
10.1.2.1/24 sub
...
DHCP client DHCP client Gateway
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