ZyXEL Communications 43222612 User Manual page 276

Configure.
Figure 207 Advanced Application > IP Source Guard > IPv4 Source Guard Setup > ARP Inspection >
Configure
The following table describes the labels in this screen.
Table 129 Advanced Application > IP Source Guard > IPv4 Source Guard Setup > ARP Inspection >
Configure
LABEL DESCRIPTION
Active Select this to enable ARP inspection on the Switch. You still have to enable ARP inspection
on specific VLAN and specify trusted ports.
Filter Aging Time
Filter aging time This setting has no effect on existing MAC address filters.
Enter how long (1 – 2147483647 seconds) the MAC address filter remains in the Switch after
the Switch identifies an unauthorized ARP packet. The Switch automatically deletes the
MAC address filter afterwards. Type 0 if you want the MAC address filter to be permanent.
Log Profile
Log buffer size Enter the maximum number (1 – 1024) of log messages that were generated by ARP packets
and have not been sent to the syslog server yet. Make sure this number is appropriate for
the specified Syslog rate and Log interval.
If the number of log messages in the Switch exceeds this number, the Switch stops recording
log messages and simply starts counting the number of entries that were dropped due to
unavailable buffer. Click Clearing log status table in the ARP Inspection Log Status screen to
clear the log and reset this counter.
Syslog rate Type the maximum number of syslog messages the Switch can send to the syslog server in
one batch. This number is expressed as a rate because the batch frequency is determined
by the Log Interval. You must configure the syslog server to use this. Enter 0 if you do not
want the Switch to send log messages generated by ARP packets to the syslog server.
The relationship between Syslog rate and Log interval is illustrated in the following examples:
•
•
Log interval Type how often (1 – 86400 seconds) the Switch sends a batch of syslog messages to the
syslog server. Enter 0 if you want the Switch to send syslog messages immediately. See Syslog
rate for an example of the relationship between Syslog rate and Log interval.
Four invalid ARP packets per second, Syslog rate is 5, Log interval is 1: the Switch sends 4
syslog messages every second.
Six invalid ARP packets per second, Syslog rate is 5, Log interval is 2: the Switch sends 5
syslog messages every 2 seconds.
GS2220 Series User's Guide
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