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Cooper Bussmann BU-245U-E Wireless Ethernet & Device Server User Manual

ARP Filter Configuration

ARP (Address Resolution Protocol) is a broadcast message and is primarily used for finding a MAC address when only its IP or some other
Network Layer address is known.
On large networks, you generally tend to get a high proportion of broadcast messages.Using ARP filters is useful for reducing broadcast traffic
on the wireless network by only allowing ARP requests for known units to pass,or blocking ARP requests for high use addresses.
Select “Blacklist”or “Whitelist” A Blacklist will block ARP requests that match the entry.
A Whitelist will allow only ARP Requests that match the entry.All other devices are blocked.
Add Entry Add a row to the table of ARP Address filter rules.
Delete Entry Delete the currently selected ARP address filter rule.
Enable Check this box to enable the rule.
IP Address This sets the IP address that you wish to filter.
IP Netmask Sets the IP Netmask.
Save Changes Save changes to non-volatile memory (Reset is required to activate).
Save Changes and Reset Save to non-volatile memory and restart to activate changes.
3.17 Serial Port Configuration
The BU-245U-E has an RS-232, and an RS-485 port for serial communications.These ports may be used for different purposes. The BU-245U-E
offers three different serial functions, which are PPP server; Serial Gateway; and Modbus TCP to RTU Gateway.

RS-232 PPP Server

The BU-245U-E can be used as a PPP (Point-to-Point Protocol) Server to connect the wireless system to serial devices via the RS232 or RS485
serial ports.
PPP Server enables a network connection to the BU-245U-E over a serial cable. This is much like dial up internet.The maximum serial data rate is
115,200bps. Hardware or Software flow control may be selected.
With minimal configuration on the PC, you may use Dial up networking in Windows XP to connect to the network via the serial port.
For the BU-245U-E, users must configure the local IP address for the BU-245U-E and the remote device IP address.Some care must be taken in
selecting these IP addresses.
• If you wish to use routing over this serial network connection, then the IP addresses selected must not lie on Wireless or Wired Ethernet
networks already configured into the device.You must ensure they set routing rules appropriately for devices either side of the network.
• If you want the serial device visible as present on the Wireless or Wired network, then the local IP address must be the same as the IP address
set for the desired port.A process called “Proxy ARP” is used to make the device visible on the network. In this process, the BU-245U-E
pretends that it holds the IP address on the network, and responds on behalf of the remote device.
The result of this is similar to bridging for a single device, with some exceptions.One of these exceptions is the inability to handle name ser ver
searches of the network via this serial link. For example,you would encounter difficulty if you were to use Windows Explorer over the serial link to
find a PC on the wired network. For this to operate correctly you must explicitly map computer names to IP addresses in the “LMHOSTS”file on
your PC.
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