3com 3031 Instruccion De Instalación

By default, no DHCP address pool is available for dynamic allocation. 

If you use the command repeatedly, the new configurations will overwrite the 
previous ones. 

In configuring address allocation by DHCP server, you should exclude those IP 
addresses which have been occupied. Otherwise, one IP address may be allocated 
to two hosts, which will cause address conflict. 

Perform the following in the System View. 

By default, all addresses in the DHCP address pool will be automatically allocated. 

Using this command repeatedly, you can exclude multiple IP addresses from being 
allocated. When using the 

 command, make 

sure all parameter selected in the command are consistent with those in 
forbidding operation. 

DHCP server can assign different lease duration limit for different address pools, 
but the same lease duration limit for the addresses in the same address pool. 

Address lease duration limit cannot be renewed automatically. 

The system provides different configuration modes for different types of address 
pools. 

Perform the following in the DHCP Address Pool View. 

Table 421   Configuring IP address range for dynamic allocation

Configures IP address range for dynamic 
allocation

network ip-address [ mask netmask ]

Delete dynamic IP address range

Table 422   Excluding IP address from auto allocation

Forbids auto allocation of an 
IP address

dhcp server forbidden-ip low-ip-address [ 
high-ip-address ]

Allows auto allocation of 
the IP address

undo dhcp server forbidden-ip low-ip-address 
[ high-ip-address ]

Table 423   Configuring lease expiry limit for global DHCP address pool

Configures expiry limit for dynamic IP 
address lease

expired { day day [ hour hour [ minute 
minute ] ] | unlimited }

Resets the lease expiry limit to the 
default value