ZyXEL Communications 43222612 User Manual page 343

The following table describes the fields in the above screen.
Table 175 Advanced Application > Anti-Arpscan > Configure
LABEL DESCRIPTION
Active Select this to enable Anti-arpscan on the Switch.
Port Threshold A port threshold is determined by the number of packets received per second on the port.
If the received packet rate is over the threshold, then the port is put into an Err-Disable
state. Type the maximum number of packets per second allowed on the port before it is
blocked.
Note: The allowed range is 2 to 255 packets received per second.
Host Threshold A host threshold is determined by the number of ARP-request packets received per
second. This is the global threshold rate for all hosts. If the rate of a host is over the
threshold, then that host is blocked by using a MAC address filter. A blocked host is
released automatically after the MAC aging time expires.
Type the maximum number of ARP-request packets allowed by a host before it is blocked.
Note: The allowed range is 2 to 100 ARP-request packets per second.
Note: The port-based threshold must be larger than the host-based threshold or
Port This field displays the port number.
* 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 Untrusted or Trusted for the associated port. Anti-arpscan is not performed on
trusted hosts.
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.
Cancel Click this to reset the values in this screen to their last-saved values.
Chapter 37 Anti-Arpscan
the host-based threshold will not be applied.
GS2220 Series User's Guide
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