H3C Technologies H3C S10500 Series Switches - Manual (Page 51)

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To do… Use the command… Remarks
Specify the address lease duration
expired { day day [ hour hour
[ minute minute ] [ second
second ] ] | unlimited }
Optional
One day by default.
Return to system view quit —
Exclude IP addresses from
automatic allocation dhcp server forbidden-ip
low-ip-address [ high-ip-address ]
Optional
Except IP addresses of the DHCP
server interfaces, all addresses in
the DHCP address pool are
assignable by default.
NOTE:
•
In common address pool view, using the network or network ip range command repeatedly overwrites
the previous configuration.
• After you exclude IP addresses from automatic allocation by using the dhcp server forbidden-ip
command, neither a common address pool nor an extended address pool can assign these IP addresses
through dynamic address allocation.
• Using the dhcp server forbidden-ip command repeatedly can exclude multiple IP address ranges from
allocation.
Configuring dynamic address allocation for an extended
address pool
Extended address pools support dynamic address allocation only.
When configuring an extended address pool, you must specify:
• Assignable IP address range
• Mask
After the assignable IP address range and the mask are specified, the address pool becomes valid.
Follow these steps to configure dynamic address allocation for an extended address pool:
To do… Use the command… Remarks
Enter system view system-view —
Enter extended address pool
view dhcp server ip-pool pool-name
extended
—
Specify the IP address range
network ip range min-address
max-address Required
Not specified by default.
Specify the IP address mask network mask mask
Required
Not specified by default.
Specify the IP address range for
the DHCP clients of a specified
vendor
vendor-class-identifier
hex-string&<1-255> ip range
min-address max-address
Optional
Not configured by default.
Specify the address lease
duration
expired { day day [ hour hour
[ minute minute [ second second ] ] ]
| unlimited }
Optional
One day by default.