ZyXEL Communications XGS3700-48 User Manual page 283

Figure 195 IP Source Guard > IPv4 Source Guard Setup > ARP Inspection > Configure
The following table describes the labels in this screen.
Table 132 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. See
25.7.2 on page
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
page
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.
Chapter 25 IP Source Guard
281.
485) to use this. Enter 0 if you do not want the Switch to send log messages
4 invalid ARP packets per second, Syslog rate is 5, Log interval is 1: the Switch
sends 4 syslog messages every second.
6 invalid ARP packets per second, Syslog rate is 5, Log interval is 2: the Switch
sends 5 syslog messages every 2 seconds.
GS3700/XGS3700 Series User's Guide
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Section
(Chapter 50 on