Chapter 28 ARP Inspection
GS2220 Series User’s Guide
275
Fig ure 206 Advanced Application > IP Source Guard > IPv4 Source Guard Setup > ARP Inspection > Log
Status
The following table describes the labels in this screen.
28.2 ARP Inspe c tio n Co nfig ure
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 Adva nc e d Applic a tio n > IP So urc e G ua rd > IPv4 Sourc e G ua rd Se tup > ARP Inspe c tio n >
Table 128 Advanced Application > IP Source Guard > IPv4 Source Guard Setup > ARP Inspection > Log
Status
LABEL DESC RIPTIO N
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 o ve rflo w 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 Inspe c tio n Co nfig ure screen.
Reason This field displays the reason the log message was generated.
dhc p de ny: An ARP packet was discarded because it violated a dynamic binding with
the same MAC address and VLAN ID.
sta tic de ny: An ARP packet was discarded because it violated a static binding with the
same MAC address and VLAN ID.
de ny: An ARP packet was discarded because there were no bindings with the same
MAC address and VLAN ID.
dhc p pe rm it: An ARP packet was forwarded because it matched a dynamic binding.
sta tic pe rm it: An ARP packet was forwarded because it matched a static binding.
In the ARP Inspe c tio n VLAN Co nfig ure 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.
Time This field displays when the log message was generated.
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