3com 5500-ei pwr Instrução De Instalação

 

2-18 

z 

The IP addresses statically bound in interface address pools and the interface IP addresses must 

be in the same network segment. 

z 

There is no limit to the number of IP addresses statically bound in an interface address pool, but the 

IP addresses statically bound in interface address pools and the interface IP addresses must be in 

the same segment.  

z 

An IP address can be statically bound to only one MAC address or one client ID. A MAC address or 

client ID can be bound with only one IP address statically.  

z 

The IP address to be statically bound cannot be an interface IP address of the DHCP server; 

otherwise the static binding does not take effect. 

 

As an interface-based address pool is created after the interface is assigned a valid unicast IP address, 

the IP addresses contained in the address pool belong to the network segment where the interface 

resides in and are available to the interface only. So specifying the range of the IP addresses to be 

dynamically assigned is unnecessary. 

To avoid address conflicts, the DHCP server automatically excludes IP addresses (used by the gateway, 

FTP server and so forth) specified with the dhcp server forbidden-ip command from dynamic 

allocation. 

To avoid IP address conflicts, the IP addresses to be dynamically assigned to DHCP clients are those 

not occupied by specific network devices (such as gateways and FTP servers). 

The lease time can differ with address pools. But that of the IP addresses of the same address pool are 

the same. Lease time is not inherited, that is to say, the lease time of a child address pool is not affected 

by the configuration of the parent address pool. 

Follow these steps to configure the dynamic IP address allocation mode: 

Enter system view 

— 

interface interface-type 
interface-number 

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

Configure for 
the current 
interface 

Configure 
the lease 
time 

Configure 
multiple 
interfaces in 
system view 

dhcp server expired { day day 
[ hour hour [ minute minute ] ] | 
unlimited } { interface 
interface-type interface-number 
[ to interface-type 
interface-number ] | all } 

Optional 

The default lease time is one 
day. 

Specify the IP addresses 
that are not dynamically 
assigned 

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

Optional 

By default, all IP addresses in a 
DHCP address pool are 
available for being dynamically 
assigned.