ZyXEL Communications XS3800-28, User Manual, Page: 626 / 789

Chapter 84 ARP Inspection
XS3800-28 User’s Guide
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Figure 493 SECURITY > IPv4 Source Guard > ARP Inspection > ARP Insp. Port Setup (Stacking Mode)
The following table describes the labels in this screen.
Table 336 SECURITY > IPv4 Source Guard > ARP Inspection > ARP Insp. Port Setup
LABEL DESCRIPTION
SLOT This field appears only in Stacking mode. Click the drop-down list to choose the slot
number of the Switch in a stack.
Port This field displays the port number. In Stacking mode, the first number represents the slot
ID and the second is the port number. Please note that the default stacking ports (the last
four ports of your Switch) cannot be configured. They are reserved for stacking only.
* Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this row first
to set the common settings and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you make
them.
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.