3com 5500-ei pwr Instrução De Instalação

 

2-15 

Configure a self-defined DHCP 
option 

option code { ascii ascii-string | hex 
hex-string&<1-10> | ip-address 
ip-address&<1-8> } 

Required 

Not configured by 
default. 

 

Be cautious when configuring self-defined DHCP options because such configuration may affect the 

DHCP operation process. 

 

 

In the interface address pool mode, after the addresses in the interface address pool have been 

assigned, the DHCP server picks IP addresses from the global interface address pool containing the 

network segment of the interface address pool and assigns them to the DHCP clients. As a result, the IP 

addresses obtained from global address pools and those obtained from interface address pools are not 

on the same network segment, so the clients cannot communicate with each other.  

Therefore, in the interface address pool mode, if the DHCP clients in a VLAN need to obtain IP 

addresses from the same network segment, the number of DHCP clients cannot exceed the number of 

the IP addresses assignable in the VLAN interface address pool. 

 

An interface address pool is created when the interface is assigned a valid unicast IP address and you 

execute the dhcp select interface command in interface view. The IP addresses contained in it belong 

to the network segment where the interface resides in and are available to the interface only. 

You can perform certain configurations for DHCP address pools of an interface or multiple interfaces 

within specified interface ranges. Configuring for multiple interfaces eases configuration work load and 

makes you to configure in a more convenient way. 

Complete the following tasks to configure the interface address pool based DHCP server: