ZyXEL Communications ES-2024 Series, User Manual, Page: 176 / 282

Chapter 23 IP Source Guard
ES-2024 Series User’s Guide
176
Figure 98 ARP Inspection Log Status
The following table describes the labels in this screen.
23.5 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 .
Table 61 ARP Inspection Log Status
LABEL DESCRIPTION
Clearing log status table Click Apply to remove all the log messages that were generated by ARP
packets and that have not been sent to the syslog server yet.
Total number of logs This field displays the number of log messages that were generated by
ARP packets and that have not been sent to the syslog server yet. If one or
more log messages are dropped due to unavailable buffer, there is an
entry called overflow with the current number of dropped log messages.
Index This field displays a sequential number for each log message.
Port This field displays the source port of the ARP packet.
VID This field displays the source VLAN ID of the ARP packet.
Sender MAC This field displays the source MAC address of the ARP packet.
Sender IP This field displays the source IP address of the ARP packet.
Num Pkts This field displays the number of ARP packets that were consolidated into
this log message. The Switch consolidates identical log messages
generated by ARP packets in the log consolidation interval into one log
message. You can configure this interval in the ARP Inspection
Configure screen. See Section 23.5 on page 176 .
Reason This field displays the reason the log message was generated.
static deny : An ARP packet was discarded because it violated a static
binding with the same MAC address and VLAN ID.
deny : An ARP packet was discarded because there were no bindings with
the same MAC address and VLAN ID.
static permit : An ARP packet was forwarded because it matched a static
binding.
In the
ARP Inspection VLAN Configure screen, you can configure the
Switch to generate log messages when ARP packets are discarded or
forwarded based on the VLAN ID of the ARP packet. See Section 23.5.2
on page 179 .
Time This field displays when the log message was generated.