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3com 5500-ei pwr Instruccion De Instalación

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Displaying and Maintaining the DHCP Server 
To do… 
Use the command… 
Remarks 
Display the statistics on IP 
address conflicts 
display dhcp server conflict { all | ip 
ip-address } 
Display lease expiration 
information 
display dhcp server expired { ip ip-address | 
pool [ pool-name ] | interface [ interface-type 
interface-number ] | all } 
Display the free IP addresses 
display dhcp server free-ip 
Display information about 
address binding 
display dhcp server ip-in-use { ip ip-address | 
pool [ pool-name ] | interface [ interface-type 
interface-number ] | all } 
Display the statistics on a 
DHCP server 
display dhcp server statistics 
Display information about 
DHCP address pool tree 
display dhcp server tree { pool [ pool-name ] | 
interface [ interface-type interface-number ] | 
all } 
Available in 
any view 
Clear IP address conflict 
statistics 
reset dhcp server conflict { all | ip ip-address } 
Clear dynamic address binding 
information 
reset dhcp server ip-in-use { ip ip-address | 
pool [ pool-name ] | interface [ interface-type 
interface-number ] | all } 
Clear the statistics on a DHCP 
server 
reset dhcp server statistics 
Available in 
user view 
 
 
Executing the save command will not save the lease information on a DHCP server to the flash memory. 
Therefore, the configuration file contains no lease information after the DHCP server restarts or you 
clear the lease information by executing the reset dhcp server ip-in-use command. In this case, any 
lease-update requests will be denied, and the clients must apply for IP addresses again. 
 
DHCP Server Configuration Examples 
Currently, DHCP networking can be implemented in two ways. One is to deploy the DHCP server and 
DHCP clients in the same network segment. This enables the clients to communicate with the server 
directly. The other is to deploy the DHCP server and DHCP clients in different network segments. In this 
case, IP address assigning is carried out through DHCP relay agent. Note that DHCP server 
configuration is the same in both scenarios. 
DHCP Server Configuration Example 
Network requirements 
z 
The DHCP server (Switch A) assigns IP address to clients in subnet 10.1.1.0/24, which is 
subnetted into 10.1.1.0/25 and 10.1.1.128/25.