3Com S7902E, Configuration Manual

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2-7
z
In common address pool view, using the network command repeatedly overwrites the previous
configuration.
z
After you exclude IP addresses from automatic allocation 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.
z
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 address allocation for an extended address pool, you need to specify:
z
Assignable IP address range
z
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 address lease
duration expired { day day [ hour hour
[ minute minute ] ] | unlimited }
Optional
One day by default.
Exclude IP addresses from
dynamic allocation
forbidden-ip ip-address &<1-8>
Optional
Except IP addresses of the
DHCP server interfaces, all
addresses in the DHCP
address pool are assignable by
default.
Excluded IP addresses specified with the forbidden-ip command in DHCP address pool view are not
assignable in the current extended address pool, but are assignable in other address pools.