ZyXEL Communications Plumbing Product metrogigabit switch User Manual

Chapter 26 IP Source Guard

MGS3700-12C User’s Guide

Use this screen to specify whether ports are trusted or untrusted ports for ARP 
inspection. You can also specify the maximum rate at which the Switch receives 

Syslog rate

Enter 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:

• 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.

Log interval

Enter 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.

Apply

Click Apply to save your changes to the Switch’s run-time 
memory. The Switch loses these changes if it is turned off or loses 
power, so use the Save link on the top navigation panel to save 
your changes to the non-volatile memory when you are done 
configuring.

Cancel

Click this to reset the values in this screen to their last-saved 
values.

Table 90   ARP Inspection Configure (continued)