Ubuntu Manpage: les, bus - ATM LAN Emulation service demons

NAME

       les, bus - ATM LAN Emulation service demons

SYNOPSIS

       les [-d module] [-m module] [-f configuration_file]

       bus [-d module] [-m module] [-f configuration_file]

DESCRIPTION

LE Service consists of three components: LAN Emulation Configuration Server (lecs(8)), LAN Emulation
Server (les) and Broadcast and Unknown Server (bus).

Les performs the control coordination function for the emulated LAN. LE clients register MAC addresses
and/or route descriptors they represent to les, and later query it when they want to resolve MAC
addresses/route descriptors into ATM addresses. Other LE control messages which are to be distributed to
every client in ELAN are also sent to les. Les forwards these messages using Control Distribute VCC which
it has set up to every client in ELAN.

Bus handles data sent by clients to broadcast and multicast MAC addresses and some of the data directed
to unicast addresses. LE Client has a possibility to send data directed to some unicast address to the
bus before target's ATM address has been resolved and the Data Direct VCC has been established.

Configuration file example for les and bus:

[main]
memdebug=True
debug=True
[load]
#memdebug=True
#debug=True
[conn]
debug=True
#S1, LE Server's ATM address
#S1=:47:00:23:00:00:00:03:00:00:01:00:02:01:00:20:ea:00:05:aa:00
S1=:47:00:23:00:00:00:03:03:00:01:00:02:01:00:20:ea:00:0a:e9:01
#S2, LAN Type
S2="802.3"
#S3, Maximum Frame Size
S3=1516
#S4, Join Timeout, s
S4=15
#S5, Maximum Frame Age, s
S5=6
#S6, BUS Atm address
S6=:47:00:23:00:00:00:03:03:00:01:00:02:01:00:20:ea:00:0a:e9:02 #viulu
#S6=0,0,170
#ELANNAME="asdf"

The configuration file contains each modules name in brackets followed by variable definitions for that
module. The definitions are of form variable=value, where value can be either an integer, a truth value
(True/False), a string enclosed in double quotes ("string") or an ATM address in hexadecimal format.
Variables that can be set are the debug/memdebug for each module and variables S1-S6 as defined in LE
specification.

S1=Address of the LES. This address is used in ATM
signalling.
S2=Type of the emulated LAN. Valid values is "802.3".
S3=Maximum frame size. Valid value is 1516.
S4=Join Timeout. Time in seconds which LES waits for
LE_JOIN_REQUEST before tearing down a connection.
S5=Maximum frame Age. Currently not used.
S6=Address of the BUS. This address is used in ATM signalling.
ELANNAME= Name of the emulated LAN

SIGHUP causes restart of the server. All resources are released and server is started. SIGUSR1 causes the
server to dump its internal state. SIGUSR2 shuts down the server (hopefully) gracefully.

OPTIONS

       -d module
              Set debugging messages on for a module. "All" sets debugging on for all modules.

       -m module
              Set memory debugging messages on for a module. "All" sets debugging on for all modules.

       -f configuration_file
              Use the specified configuration file instead of .lanevars.

FILES

       .lanevars                configuration file

BUGS

       Servers  don't establish point-to-multipoint connections to LE clients as the specification states, which
       means that some LE clients won't work with these servers.

       Supports only IEEE 802.3 / Ethernet type of ELANs.

       This manual page is confusing.

AUTHOR

       Marko Kiiskila, TUT <carnil@cs.tut.fi>