H3C Technologies H3C S5560 Series Switches - Manual (Page 50)

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• If you use the network or address range command multiple times for the same address pool, the
most recent configuration takes effect.
• 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 multiple address ranges for a DHCP address pool:
Step Command Remarks
1. Enter system view. system-view N/A
2. Create a DHCP user class and
enter DHCP user class view.
dhcp class class-name
Required for client
classification.
By default, no DHCP user class
exists.
3. Configure the match rule for the
DHCP user class.
if-match rule rule-number option
option-code [ hex hex-string [ offset
offset length length | mask mask ] ]
Required for client
classification.
By default, no match rule is
specified for a DHCP user
class.
4. Return to system view. quit N/A
5. Enter address pool view. dhcp server ip-pool pool-name N/A
6. Specify the primary subnet for
the address pool. network network-address
[ mask-length | mask mask ] By default, no primary subnet is
specified.
7. (Optional.) Specify the common
address range.
address range start-ip-address
end-ip-address By default, no IP address range
is specified.
8. (Optional.) Specify an IP
address range for a DHCP user
class.
class class-name range
start-ip-address end-ip-address
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.
9. (Optional.) Set the address
lease duration.
expired { day day [ hour hour
[ minute minute [ second second ] ] ]
| unlimited }
The default setting is 1 day.
10. (Optional.) Exclude the
specified IP addresses in the
address pool from dynamic
allocation.
forbidden-ip ip-address&<1-8>
By default, all the IP addresses
in the DHCP address pool are
assignable.
To exclude multiple address
ranges from dynamic
allocation, repeat this step.
11. Return to system view. quit N/A
12. (Optional.) Exclude the
specified IP addresses from
automatic allocation globally.
dhcp server forbidden-ip
start-ip-address [ end-ip-address ]
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.