Arp Rate-Limit - 3Com 5500-EI PWR Reference Manual

By default, when the port state auto-recovery function is enabled, the recovery interval is 300 seconds.
Note that:
You need to enable the port state auto-recovery feature before you can configure the
auto-recovery interval.
If you use the arp protective-down recover interval command to modify the recovery time when
the current port has been already shut down due to an excessive ARP packet receiving rate, the
previously configured interval applies to the first port state recovery. Starting from the next state
recovery, the new recovery interval will take effect.
Examples
# Set the auto-recovery interval to 30 seconds.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] arp protective-down recover enable
[Sysname] arp protective-down recover interval 30

arp rate-limit

Syntax
arp rate-limit rate
undo arp rate-limit
View
Ethernet port view
Parameters
rate: Maximum ARP packet receiving rate on the port, in the range of 10 to 1,024 pps.
Description
Use the arp rate-limit command to specify the maximum ARP packet receiving rate on the port. If a rate
is specified, exceeding packets will be discarded.
Use the undo arp rate-limit command to restore the default.
By default, after a port is enabled with the ARP packet rate limit function, the maximum ARP packet
receiving rate on the port is 15 pps.
Note that:
You must enable the ARP packet rate limit function before you can specify the maximum ARP packet
receiving rate on the port by using the arp rate-limit command.
Examples
# Set the maximum ARP packet receiving rate on Ethernet 1/0/11 to 100 pps.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface ethernet 1/0/11
[Sysname-Ethernet1/0/11] arp rate-limit enable
[Sysname-Ethernet1/0/11] arp rate-limit 100
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