ZyXEL ES-3148 Guida Utente

 Chapter 24 IP Source Guard

ES-3148 User’s Guide

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.

Figure 109   Advanced Application > IP Source Guard > ARP Inspection > Configure

The following table describes the labels in this screen.

Table 80   Advanced Application > IP Source Guard > ARP Inspection > Configure

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. Enter 0 if 

you want the MAC address filter to be permanent.

Log Profile

Log buffer size

Enter the maximum number (0-1024) 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