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Eliminating Bridge When configuring more than one LEC in a LANplex 2500 or

Loops in ELAN CoreBuilder 2500 system, a bridge loop may be created. This possibility Configurations exists because the LANplex can bridge between all ports, including logical

bridge ports (LECs). Because the Spanning Tree Protocol (STP) is off by default, we recommend following this procedure when you create multiple LECs with Intelligent Switching software:

1After you define all LECs, at the Enable State prompt, enter enable

2Enable STP. From the top level of the Administration Console, enter: bridge stpState enabled

3Reboot the system.

The system adds the LECs to the bridge table.

Configuring Clients to You can configure a LAN Emulation Client (LEC) to join an existing 802.3 Join an Existing emulated LAN by providing information about the LAN Emulation Server

Emulated LAN (LES) and the Broadcast and Unknown Server (BUS).

Defining LAN Emulation Clients

When you define a LAN Emulation Client, you give information necessary for a client to be included in the emulated LAN. A BUS and a LES must already be defined as part of the emulated LAN before you can define a client.

When the client attempts to join the emulated LAN, some of the configured information is carried along with the join request sent to the LES. The LES can alter this information. The client then has the option of accepting or rejecting any changes made by the LES. If the changes are accepted or if there are no changes, the client successfully joins the emulated LAN. Otherwise, the join fails.

To define a client:

1From the top level of the Administration Console, enter: atm lane define

2Enter the number of the ATM port to which the client is attached. You can attach only one client per port to the same emulated LAN.

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3Com Version 8.1.2 manual Emulated LAN LES and the Broadcast and Unknown Server BUS, Defining LAN Emulation Clients

Version 8.1.2 specifications

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