1 arp inspection port configure – ZyXEL Communications XGS-4526 User Manual
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Chapter 26 IP Source Guard
XGS-4526 User’s Guide
261
26.7.1 ARP Inspection Port Configure
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
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
.
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:
• 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
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.
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 85 ARP Inspection Configure (continued)
LABEL
DESCRIPTION