Support Center Application Notes General Application Notes
 
  
What can be achieved with Bind IP to MAC ?

1. DHCP assign fixed IP -- Normal mode

Assuming you have 2 DHCP clients in your local LAN. One is VoIP device which you want to assign a fixed IP address always, say 172.17.1.4. The MAC address of this VoIP device is 00:50:7F:27:4E:21.

1-1. Select Enable.
1-2. Manually enter the IP-MAC info and added it to the IP Bind List.



1-3. In the DHCP table you will find the corresponding settings are finished. When the VoIP device is connected to the router, it will always get the IP address 172.17.1.4.

Note : In this DHCP table you will find the device with MAC address 00:50:7F:33:31:F9 gets a dynamic IP address 172.17.1.11. This device and all the other devices which use static IP addresses ( from 172.17.1.20 to 172.17.1.24 ) can also access the Internet.



2. Add Static ARP for Wake on LAN -- Normal mode

Wake on LAN allows you to send a magic packet from anywhere in the world to remotely wake up a WOL enabled computer on a LAN. The router must have the ARP information of the PC to be waked up. Since the ARP record has a lifetime in the ARP cache, when the PC is in an idle/standby state, its ARP record will be deleted soon. You may use telnet command to add the ARP record the time when you want to wake up a PC. Or you may use Bind-IP-MAC feature to add static ARP record which will be permanently kept.

Assuming the computer for WOL is 172.17.1.4 with MAC address 00:50:7F:27:4E:21.

2-1. Select Enable.
2-2. Add the IP-MAC into the IP Bind List.



2-3. In the ARP table you will find the corresponding settings are finished. No matter whether this computer is up or down, its ARP information is always kept in the router.



3. IP based application ( firewall, filter ) -- Strict mode

For some IP based applications, such as Bandwidth Management ( Session Limit, Bandwidth Limit, QoS ) and Firewall ( IP filter ), if the users change their IP addresses, the rules are invalid. With the IP-MAC binding function ( Strict mode ) you can limit the users to use appointed IP addresses.


Page last modified : 13 October 2008