3com 5500-ei pwr Guía De Referencia

 

4-2 

System view 

interval: Interval (in seconds) for a port disabled due to the DHCP traffic exceeding the set threshold to 

be brought up again. This argument ranges from 10 to 86,400. 

Use the dhcp protective-down recover interval command to set an auto recovery interval. 

Use the undo dhcp protective-down recover interval command to restore the default interval. 

With the port state auto-recovery function enabled on a switch, the auto recovery interval defaults to 

300 seconds. 

Note that: 

z 

Before configuring the port state auto-recovery interval, you must enable port state auto-recovery 

on the switch first. 

z 

The new port state auto-recovery interval only applies to the ports that are shut down after the 

dhcp protective-down recover interval command is last executed. 

# Set the port state auto-recovery interval to 30 seconds. 

<Sysname> system-view 

System View: return to User View with Ctrl+Z. 

[Sysname] dhcp protective-down recover enable  

[Sysname] dhcp protective-down recover interval 30 

dhcp rate-limit rate 

Ethernet port view 

rate: Maximum rate of DHCP traffic in pps. This argument ranges from 10 to 150. 

Use the dhcp rate-limit command to configure the maximum rate of DHCP traffic for the port. When 

the number of DHCP packets received on the port per second exceeds the specified threshold, the 

switch will discard the exceeding DHCP packets. 

Use the undo dhcp rate-limit command to restore the default. 

By default, after the DHCP traffic limit is enabled, the maximum rate of DHCP traffic is 15 pps. 

Note that: