Setting up LAN Emulation Basic Configuration and Setup
8-10 Centillion 1200N ATM Switch User Manual
NTP 297-8103-903
Setting up LAN Emulation
The following shows an example of LAN emulation with two ATM switches
interconnected and a LAN emulation client attached to each switch.
LAN emulation, as its name suggests, emulates an Ethernet LAN environment a nd
is also known as MAC over ATM. Various proto cols such a s TCP/IP, Netware IPX,
and Appletalk can be transported over the Ethernet. In this section we will assume
that a successful LAN emulation environment is built by confirming a TCP/IP
connection with a ping command between clients.
LAN emulation requires a LAN Emulation Service within an emulated LAN to
provide services for features of a shared media network which have to be spe ciall y
emulated in a switched network, such as address resolution or broadcast message.
An example is a broadcast message. An example is a broadcast message. A LAN
emulation service consists of three servers: LAN Emulation Configuration Server
(LECS), LAN Emulation Server (LES), and Broadcast/Unknown Server (BUS).
All of these three servers are implemented in software within an 8550 switch
interface card/or module which is not currently available for a product release.
Port 01, network UNI 3.0
PC
LEC
NETNEX 8550-LES
#1
Clock: MASTER
PNNI 0.5Port 00, network
Port 00, user
UNI 3.0
Port 03, network
NETNEX 8550
#2
PC
LEC/MAT
IP address: 133.205.8.39
Network Prefix: 470079-00000000000000000000
LECS ATM address: 470079-00000000000000000000-777777777777-00
LES ATM address: 470079-00000000000000000000-888888888888-00
BUS ATM address: 470079-00000000000000000000-999999999999-00
IP address: 133.205.8.10
Network Prefix: 470079-11111111111111111111
IP address: 133.205.8.1
IP address: 133.205.8.xx