Configuring Port State Auto Recovery; Rate Limit Configuration Example - 3Com 4500 PWR 26-Port Configuration Manual

To do...
Enter port view
Enable the DHCP packet
rate limit function
Configure the maximum
DHCP packet rate allowed
on the port
Enable the port state auto-recovery function before setting the auto-recovery interval.
You are not recommended to configure DHCP packet rate limit on the ports of an aggregation
group.

Configuring Port State Auto Recovery

Follow these steps to configure port state auto re
To do...
Enter system view
Enable port state auto-recovery
Configure the port state
auto-recovery interval
Rate Limit Configuration Example
N etwork requirements
As shown in Figure
1 /0/2 is connected to client B and Ethernet 1/0/11 is connected to client A.
Enable DHCP snooping on the switch, and specify Ethernet 1/0/1 as the DHCP snooping trusted
port.
Configure DHCP packet rate limit on Ethernet 1/0/11 and set the maximum DHCP packet rate
allowed on the port to 100 pps.
Set the port state auto-recovery interval to 30 seconds on the switch.
Use the command...
interface interface-type
interface-number
dhcp rate-limit enable
dhcp rate-limit rate
Use the command...
system-view
dhcp protective-down
recover enable
dhcp protective-down
recover interval interval
42-1, Ethernet 1/0/1 of the S4500 switch is connected to the DHCP server. Ethernet
—
Required
By default, DHCP packet rate limit is
disabled.
Optional
By default, the maximum rate is 15
pps.
covery:
42-2
Remarks
Remarks
—
Required
By default, this function is
disabled.
Optional
By default, the auto-discovery
interval is 300 seconds.