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Step
5.
(Optional.) Specify an IP
address range for a DHCP user
class.
6.
(Optional.) Set the address
lease duration.
7.
(Optional.) Exclude the
specified IP addresses in the
address pool from dynamic
allocation.
8.
Return to system view.
9.
(Optional.) Exclude the
specified IP addresses from
automatic allocation globally.
Specifying a primary subnet and multiple secondary subnets for a DHCP address pool
If an address pool has a primary subnet and multiple secondary subnets, the server assigns IP
addresses on a secondary subnet when the primary subnet has no assignable IP addresses.
Follow these guidelines when you specify a primary subnet and secondary subnets for a DHCP
address pool:
•
You can specify only one primary subnet in each address pool. If you use the network
command multiple times, the most recent configuration takes effect.
•
You can specify a maximum of 32 secondary subnets in each address pool.
•
IP addresses specified by the forbidden-ip command are not assignable in the current address
pool, but are assignable in other address pools. IP addresses specified by the dhcp server
forbidden-ip command are not assignable in any address pool.
To specify a primary subnet and secondary subnets for a DHCP address pool:
Step
1.
Enter system view.
2.
Enter DHCP address pool view.
3.
Specify the primary subnet.
4.
(Optional.) Specify a secondary
subnet.
5.
(Optional.) Return to address
pool view.
Command
class class-name range
start-ip-address end-ip-address
expired { allow-hint | { day day
[ hour hour [ minute minute
[ second second ] ] ] | unlimited }
[ allow-hint ] }
forbidden-ip ip-address&<1-8>
quit
dhcp server forbidden-ip
start-ip-address [ end-ip-address ]
[ vpn-instance
vpn-instance-name ]
Command
system-view
dhcp server ip-pool pool-name
network network-address
[ mask-length | mask mask ]
network network-address
[ mask-length | mask mask ]
secondary
quit
100
Remarks
By default, no IP address
range is specified for a user
class.
The DHCP user class must
already exist.
To specify address ranges for
multiple DHCP user classes,
repeat this step.
The default setting is 1 day.
By default, all the IP
addresses in the DHCP
address pool are assignable.
N/A
By default, except for the IP
address of the DHCP server
interface, all IP addresses in
address pools are assignable.
To exclude multiple IP
address ranges, repeat this
step.
Remarks
N/A
By default, no DHCP
address pool exists.
By default, no primary subnet
is specified.
By default, no secondary
subnet is specified.
N/A
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Troubleshooting
