ZyXEL Communications XS3800-28, Руководство пользователя, Страница: 586 / 789

Chapter 78 Anti-Arpscan
XS3800-28 User’s Guide
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Figure 461 SECURITY > Anti-Arpscan > Anti-Arpscan Setup (Stacking Mode)
The following table describes the fields in the above screen.
Table 313 SECURITY > Anti-Arpscan > Anti-Arpscan Setup
LABEL DESCRIPTION
Active Enable the switch button 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
the host-based threshold will not be applied.
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.