ZyXEL Communications MES3500-24F User Manual
Chapter 26 IP Source Guard
MES3500-24/24F User’s Guide
231
open this screen, click Advanced Application > IP Source Guard > ARP Inspection >
Configure > Port.
Configure > Port.
Figure 122
ARP Inspection Port Configure
The following table describes the labels in this screen.
Table 85
ARP Inspection Port Configure
LABEL
DESCRIPTION
Port
This field displays the port number. If you configure the * port, the settings are applied to all
of the ports.
of the ports.
Trusted State
Select whether this port is a trusted port (Trusted) or an untrusted port (Untrusted).
The Switch does not discard ARP packets on trusted ports for any reason.
The Switch discards ARP packets on untrusted ports in the following situations:
•
The sender’s information in the ARP packet does not match any of the current bindings.
•
The rate at which ARP packets arrive is too high. You can specify the maximum rate at
which ARP packets can arrive on untrusted ports.
Limit
Rate and Burst Interval settings have no effect on trusted ports.
Rate (pps)
Specify the maximum rate (1-2048 packets per second) at which the Switch receives ARP
packets from each port. The Switch discards any additional ARP packets. Enter 0 to disable
this limit.
packets from each port. The Switch discards any additional ARP packets. Enter 0 to disable
this limit.
Burst interval
(seconds)
(seconds)
The burst interval is the length of time over which the rate of ARP packets is monitored for
each port. For example, if the Rate is 15 pps and the burst interval is 1 second, then the
Switch accepts a maximum of 15 ARP packets in every one-second interval. If the burst
interval is 5 seconds, then the Switch accepts a maximum of 75 ARP packets in every five-
second interval.
each port. For example, if the Rate is 15 pps and the burst interval is 1 second, then the
Switch accepts a maximum of 15 ARP packets in every one-second interval. If the burst
interval is 5 seconds, then the Switch accepts a maximum of 75 ARP packets in every five-
second interval.
Enter the length (1-15 seconds) of the burst interval.
Apply
Click Apply to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the Save link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
changes if it is turned off or loses power, so use the Save link on the top navigation panel to
save your changes to the non-volatile memory when you are done configuring.
Cancel
Click this to reset the values in this screen to their last-saved values.