PLANET XGS3-24040 - Manual (Page 191)

Chapter 21 Layer 3 Forward Configuration
21-21
21.5.3 ARP Troubleshooting
If ping from the switch to directly connected network devices fails, the following can be used to check the
possible cause and create a solution.
 Check whether the corresponding ARP has been learned by the switch.
 If ARP has not been learned, then enabled ARP debugging information and view the sending/receiving
condition of ARP packets.
 Defective cable is a common cause of ARP problems and may disable ARP learning.