User's Manual

If a single server is used, the AMU also supports client bridging provided the option is selected.

The client bridging allows clients under the same server to communicate with each other based

on MAC address via an AMU.

With Ethernet bridging, the packet forwarding only happens between the two Ethernet ports in the

AMU (i.e.: packets received from a interface would not be transmitted over the same interface,

even the address table indicates that the destination is on the same Ethernet port). With client

bridging, the bridging software compares the destination address against its address table. If a

match is found, the packet would be forwarded to the Ethernet port regardless whether the

original message is received on the same port.

3.1 Default Configuration of AMU

Upon factory test and before shipment, each AMU has been configured by the following default values:

• Software bridging is turned on with Spanning Tree enabled.

• Ethernet A (EthA) is configured with

o IP address 192.168.169.170

o IP mask 255.255.255.0

• Ethernet 1 (EthB) is configured with no IP address

• Default Gateway IP address: 192.168.169.171

3.2 Modifying the Default AMU Configuration

There are two ways to modify the default configuration of AMU: using a Web based configuration utility

embedded in the AMU, or using an external SNMP manager (such as HP Open View).

The following parameters may be configured via either a Web interface or an SNMP manager:

• IP address for EthA

• IP network mask for EthA

• Default gateway IP address

• Disable/Enable Bridging /Routing

• Disable/Enable Spanning Tree Protocol

After modification of above items, the AMU must be rebooted in order for the modification to take place.

The rebooting process may also be initiated via a Web or a SNMP manager interface.

Note: Client bridging does not work in the multiple base radio transceiver environment. The multi-

base radio transceiver environment requires a Ethernet switch between base radio transceivers

and AMU, and the Ethernet switch will not forward packets to the AMU if clients associated with

the same base radio transceiver try to communicate with each other.

3.3 Configuring AMU using Web Browser

When configuring AMU using Web based configuration utility, an external device (such as a PC or

workstation) equipped with an Ethernet port is needed. An Ethernet crossover cable should be used to

connect the PC to the AMU Ethernet port A (EthA). A general-purpose browser (Netscape or Internet

Explore) should be used to configure the unit.

When configuring the AMU for the first time (AMU with default manufacture setting), the steps described

below should be used:

Step 1: The device (a PC or a workstation) must be configured with IP address in the

192.168.169.0 network (such as 192.168.169.171). Don’t use 192.168.169.170 since it is already

used by the AMU.