Cisco Systems 78-6897-01 manual Implementing LANE, Supporting LAN Protocols, Addressing

Implementing LANE

•LANE server (LES)—A server that registers LECs to join the ELAN. In LANE 1.0, without Simple Server Redundancy Protocol (SSRP), each ELAN has only one Cisco LES, which handles LAN Emulation Address Resolution Protocol (LE_ARP) requests.

•Broadcast-and-unknown server (BUS)—A server that floods unknown destination addresses and forwards multicast and broadcast traffic to clients within an ELAN. In LANE 1.0 without SSRP, one Cisco BUS exists per ELAN.

Implementing LANE

The following sections describe specific information and considerations you might need to consider prior to LANE implementation:

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Supporting LAN Protocols

Addressing

Assigning Components to Interfaces and Subinterfaces

Supporting LAN Protocols

The ATM switch router supports both Ethernet and Token Ring LANE. This chapter describes only Ethernet configuration information. For Token Ring configuration information, refer to the ATMSwitch Router Software Configuration Guide.

Addressing

On a LAN, packets are addressed by the MAC-layer address of the destination and source stations. To provide similar functionality for LANE, every LANE client must have a MAC address. In addition, every LANE component (LES, LEC, BUS, and LECS) must have a unique ATM address.

All LANE clients on the same interface have the same automatically assigned MAC address, which is also used as the end-system identifier (ESI) part of the ATM address. Although client MAC addresses are not unique, all ATM addresses are unique.

Configuring LANE 4-3