ATMARPD(8) Maintenance Commands ATMARPD(8)NAME
atmarpd - ATMARP demon
SYNOPSIS
atmarpd [-b] [-d] [-D directory] [-l logfile] [-m] [-n]
atmarpd -V
DESCRIPTION
atmarpd implements the ATMARP protocol as specified in RFC1577 and RFC1755. Address resolution requests are sent from the kernel (using a
comparably simple protocol) to the ATMARP demon, which then performs the dialog with the network.
atmarpd can operate as an ATMARP client and as an ATMARP server. If also supports the concurrent use of several IP over ATM interfaces.
atmarpd is configured from the command line using the atmarp program. Unless debugging is enabled, the ATMARP table is written after every
change to the file /var/run/atmarpd.table (or to a file with the same name in a different directory, if the -D option is used).
Note that atmarpd disables support for SVCs if signaling is not available at start time, i.e. if atmsigd is not running.
OPTIONS -b Run in background (i.e. in a forked child process) after initializing.
-d Enables (lots of) debugging output. By default, atmarpd is comparably quiet.
-D dump_dir
Changes the directory where atmarpd writes its table (atmarpd.table). By default, /var/run is used.
-l logfile
Write diagnostic messages to the specified file instead of to standard error. The special name syslog is used to send diagnostics to
the system logger.
-m Enables merging of incoming calls if the address is known. An incoming connection on which no InARP reply has been received yet,
but which originates from an ATM address for which an ATMARP entry already exists, is automatically added to that entry. This
assumes that there is a 1:1 mapping between IP addresses and ATMARP addresses. By default, this assumption is not made, which fre-
quently results in the setup of duplicate connections. Note that RFC1577 requires that an ATMARP server sends an InARP request on an
incoming connection. Merging may therefore violate RFC1577 in this case.
-n Prints addresses in numeric format only, i.e. no address to name translation is attempted.
-V Prints the version number of atmarpd on standard output and exits.
FILES
/var/run/atmarpd.table ATMARP table
/proc/atm/arp table of currently active IP over ATM VCs
BUGS
atmarpd removes ATMARP entries from the kernel table while refreshing them.
AUTHOR
Werner Almesberger, EPFL ICA <werner.almesberger@epfl.ch>
SEE ALSO atmarp(8), atmsigd(8)Linux April 26, 2000 ATMARPD(8)
Check Out this Related Man Page
ATMSIGD(8) Maintenance Commands ATMSIGD(8)NAME
atmsigd - ATM signaling demon
SYNOPSIS
atmsigd [-b] [-c config_file] [-d] [-D dump_dir] [-l logfile] [-m mode] [-n] [-q qos] [-t trace_length] [-u uni_version] [[itf.]vpi.vci
[input output]]
atmsigd -V
DESCRIPTION
atmsigd implements the ATM UNI signaling protocol. Requests to establish, accept, or close ATM SVCs are sent from the kernel (using a com-
parably simple protocol) to the signaling demon, which then performs the dialog with the network.
Note that atmsigd is not able to accept or establish connections until the local ATM address of the interface is configured by ilmid or
manually using atmaddr.
The default signaling VC (interface 0, VPI 0, VCI 5) can be overridden on the command line by specifying a different PVC address.
When overriding the default VC, optionally a pair of named pipes to use for communicating with the user of signaling can be specified. Nor-
mally, the kernel is the user of signaling and atmsigd opens a special socket for communication with it.
If atmsigd is killed, all system calls requiring interaction with it will return with an error and set errno to EUNATCH.
OPTIONS -b Run in background (i.e. in a forked child process) after initializing.
-c config_file
Use the specified configuration file instead of /etc/atmsigd.conf If an option is specified in the configuration file and on the
command line, the command line has priority.
-d Enables (lots of) debugging output. By default, atmsigd is comparably quiet.
-D dump_dir
Specifies the directory to which atmsigd will write status and trace dumps. If -D is not specified, dumps are written to /var/tmp.
-l logfile
Write diagnostic messages to the specified file. The special name syslog is used to send diagnostics to the system logger, stderr is
used to send diagnostics to standard error. If -l is absent, the setting in atmsigd.conf is used. If atmsigd doesn't specify a des-
tination either, messages are written to standard error.
-m mode
Set the mode of operation. The following modes are available: user for the user side (the default), network for the network side
(useful if you have two PCs but no switch), and switch for operation with a signaling relay in a switch.
-n Prints addresses in numeric format only, i.e. no address to name translation is attempted.
-q qos Configures the signaling VC to use the specified quality of service (see qos(7) for the syntax). By default, UBR at link speed is
used on the signaling VC.
-t trace_length
Sets the number of entries that should be kept in the trace buffer. -t 0 disables tracing. If -t is not specified, atmsigd uses a
default of 20 trace entries.
-u uni_version
Sets the signaling mode. The following modes are supported: uni30 for UNI 3.0, uni31 for UNI 3.1, uni31+uni30 for UNI 3.1 with 3.0
compatibility, uni40 for UNI 4.0, and uni40+q.2963.1 for UNI 4.0 with Q.2963.1 peak cell rate renegotiation.
-V Prints the version number of atmsigd on standard output and exits.
FILES
/etc/atmsigd.conf default configuration file
/var/tmp/atmsigd.pid.status.version
default location of status dumps
/var/tmp/atmsigd.pid.trace.version
default location of signaling trace dumps
DEBUGGING
When receiving a SIGUSR1 signal, atmsigd dumps the list of all internal socket descriptors. With SIGUSR2, it dumps the contents of the
trace buffer. If a dump directory was set, dumps are written to files called atmsigd.pid.status.number and atmsigd.pid.trace.number,
respectively, with number starting at zero and being incremented for every dump. If no dump directory is set, dumps are written to standard
error.
Dumps are also generated whenever atmsigd detects a fatal error and terminates. No attempt is made to catch signals like SIGSEGV.
BUGS
The generation of traces is a comparably slow process which may already take several seconds for only 100 trace entries. To generate a
trace dump, atmsigd therefore forks a child process that runs in parallel to the signaling demon.
AUTHOR
Werner Almesberger, EPFL ICA <Werner.Almesberger@epfl.ch>
SEE ALSO atmaddr(8), atmsigd.conf(4), ilmid(8), qos(7)Linux April 26, 2000 ATMSIGD(8)