Arp Inspection Configure - ZyXEL Communications GS1920-24 User Manual

25.9

ARP Inspection Configure

Use this screen to enable ARP inspection on the Switch. You can also configure the length of time
the Switch stores records of discarded ARP packets and global settings for the ARP inspection log.
To open this screen, click Advanced Application > IP Source Guard > ARP Inspection >
Configure.
Advanced Application > IP Source Guard > ARP Inspection > Configure
Figure 156
The following table describes the labels in this screen.
Advanced Application > IP Source Guard > ARP Inspection > Configure
Table 99
LABEL
Active
Filter Aging Time
Filter aging time
Log Profile
Log buffer size
Chapter 25 IP Source Guard
DESCRIPTION
Select this to enable ARP inspection on the Switch. You still have to enable ARP
inspection on specific VLAN and specify trusted ports.
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. Enter 0 if you want the MAC
address filter to be permanent.
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.
25.8 on page 213.
GS1920 Series User's Guide
215
See Section