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How can I monitor ARP?
07/27/2023 
28 People found this article helpful
262,287 Views
Description
ARP (Address Resolution Protocol) maps layer 3 (IP addresses) to layer 2 (physical or MAC addresses) to enable communications between hosts residing on the same subnet. ARP is a broadcast protocol that can create excessive amounts of network traffic on your network. To minimize the broadcast traffic, an ARP cache is maintained to store and reuse previously learned ARP information.
Cause
L2 loops, ARP floods, 802.1q mismatch, subnet mask mismatch, etc.
Resolution
NOTE: Admin would need to enable different features like AppFlow Monitor or MAC-IP Anti-Spoof.
- MONITOR | Real-Time Charts | Protocol Monitor | ARP RATE
- NETWORK | System | ARP | ARP Cache | Statistics
- NETWORK | System/MAC IP Anti-spoof | Anti-spoof Cache | Statistics
- NETWORK | System/MAC IP Anti-spoof | Spoof Detected List
- MONITOR | Logs | System Logs and Filter by keyword "ARP"
- MONITOR | Tools & Monitors | Core0 Processes, and search for arp tasks usage
- Using the Packet Monitor follow the link Diagnose your network topology with SonicWall built-in Packet Monitor (layer 2 loops)
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