SM ARP-NAT Support

SM ARP-NAT Support, Beginning with Software Release 3.3:

ARP-NAT or Wireless Client Bridging is a special MAC address translation mechanism. It is similar to NAT for IP networks, except it works one layer deeper. Instead of translating IP network addresses, the ePMP device translates between the MAC hardware addresses on both sides of the interface.

If a device on the wired side of the router makes an ARP request for the MAC address of an IP on the wireless side, then the ePMP device forwards the request as if it came from the ePMP device. When the response comes back, it translates the address again. Instead of passing back the real MAC (which resides on the wireless network), the ePMP device gives its own wired MAC address. Then, when it receives frames for IP addresses on the wireless network, it forwards them through (conducted on both sides of the bridge).

ARP-NAT is configured on the SM in section Configuration > Network > Advanced.


PPPoE Client on PCs connected to the SM is not supported and throughput decreases when ARP-NAT feature is enabled.

 ARP-NAT SNMP Reference

The following SNMP/CLI objects are available in Software Release 3.3 for configuration and monitoring of ARP-NAT functions:



Default Value







Enables ARPNAT feature, translates ARP requests from Ethernet side of SM to Wireless and vice-versa:

0 - Disabled

1 - Enabled

Device Allocation:SM

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