latcp(8)latcp(8)NAMElatcp - Local Area Transport (LAT) Control Program
SYNOPSIS
/usr/sbin/latcp [options]
OPTIONS
This section is organized by the tasks you can perform with the latcp
command. Each task subsection provides the latcp command syntax and
the options to use to complete the tasks.
Starting LAT
Syntax: latcp-s
Starts LAT and enables LAT connections. If the following LAT parame‐
ters have not been set, they take on the default values: Node name --
The default value is the host name. Multicast timer -- The default
value is 60 seconds. Network adapter -- The default is all network
adapters connected to broadcast media. Service name -- The default
value is taken from the LAT node name parameter. This default service
is an unbound interactive service.
The following parameters are set to the following defaults for
each service, unless specified: Service description -- The
default value is “Tru64 UNIX Version X.X LAT SERVICE.” Rating
-- The default is dynamic rating. Group code -- The default
value is 0. Outgoing port groups -- The default value is 0.
Agent status -- The default is disabled. Maximum number of
learned services -- The default value is 100.
Halting LAT
Syntax: latcp-h
Shuts down LAT and disables LAT connections.
Adding a Service on a Host Node
Syntax: latcp-A-aservice [-idescription] [-o | -ptty_list]
Adds a service on the host node. Specifies the name of the service to
add. The service name must conform to the rules specified in the
DESCRIPTION section. Sets the service identification to the value
specified by the description field. The description field can contain
up to 64 characters. If the field contains more than one word, you
must enclose the string in double quotation marks ("). If you do not
specify a value for the description field, the default identification
string (“Tru64 UNIX Version X.X LAT Service”) is used. Indicates that
the service you are adding is an optional or dedicated service to be
used by specialized applications (such as an application service). For
example, you must use the -o option when adding the service used for
the LAT/Telnet gateway. Do not specify this option with the -p option.
For more information, refer to the Network Administration: Connections
manual.
Services added without the -o option are default services.
These services are used for making interactive connections to
the Tru64 UNIX LAT host through getty entries that are spawned
from the /etc/inittab file. Identifies this service as a bound
interactive service, and binds the specified LAT terminal
devices to the named service. See lat_intro(7) for a descrip‐
tion of bound services. Do not specify this option with the -o
option.
The tty_list can be a single LAT terminal device or a list of
LAT terminal devices separated by commas with no spaces. The
LAT terminal device name syntax is only restricted by the name
of the LAT terminal device in the device directory. The follow‐
ing example adds the bound interactive service siteapp and binds
devices 620, 621, 622, and 623 to the service. # latcp-A
-asiteapp -p620,621,622,623
Mapping an Application Port
Syntax: latcp-A-ptty -Hremote_node { -Rremote_port | -Vremote_ser‐
vice } [-Q] [-wpassword | -W]
Maps an application port on the host node. Identifies the LAT terminal
device to be mapped to an application port. The LAT terminal device
name syntax is only restricted by the name of the LAT terminal device
in the device directory.
Application ports are typically not mapped using a LAT terminal
device that is also used in the /etc/inittab file. This is only
done if a dedicated terminal device (tty) on a specific terminal
is desired. For information on how to provide a dedicated tty
on a terminal, see the Network Administration: Connections man‐
ual.
If a connection is to be made to a specific port for a service,
specify the server port name. No default values are available
for the input fields when creating an application port. Identi‐
fies the remote node (terminal server) to be mapped to the LAT
terminal device specified by -ptty. The -H option is required
for mapping application ports. The remote node name must conform
to the rules specified in the DESCRIPTION section. Identifies
the name of the remote port on a server that is to be mapped to
the LAT terminal device specified by -ptty. The remote port name
must conform to the rules specified in the DESCRIPTION section.
Do not use this option with the -V option. Identifies the ser‐
vice name offered by the server that is to be mapped to the LAT
terminal device specified by -ptty. The service name must con‐
form to the rules specified in the DESCRIPTION section. Do not
use this option with the -R option. Specifies that the type of
access requested is nonqueued. There are two types of access
requests: queued and nonqueued. A queued or nonqueued request
is accepted by the server if the remote port is free. If the
remote port is busy and queuing is enabled on the server, a
queued request is queued on the server until the port becomes
available; a nonqueued request is rejected immediately.
If you do not specify the -Q option, the application port is set
to queued by default. Allows the user to specify the password
for the remote service that will be accessed through the mapped
application port. When the remote service to be accessed has
password checking enabled, this password is needed or the con‐
nection is rejected. The password is not case sensitive and
spaces are disallowed.
When using the -w option, the password is specified on the com‐
mand line and is visible. When the -W option is used, the user
will be prompted for the password and it will not be echoed.
The -w option should be used when adding this command to the LAT
/etc/latstartup.conf startup file. When you use this method, it
is recommended that the /etc/latstartup.conf file have read and
write permission for root only.
To change (or remove) the password, delete the application port
(latcp -D -ptty) and add it back with the new password (or with‐
out a password).
Mapping an Outgoing Port
Syntax: latcp-A-ptty -O -V learned_service [-Hremote_node [-Rre‐
mote_port]] [-wpassword | -W]
Maps an port on the host node. The -O option identifies the type of
port. Identifies the LAT terminal device to be mapped to an outgoing
port. The LAT terminal device name syntax is only restricted by the
name of the LAT terminal device in the device directory. Identifies
the mapped port as an outgoing port. Identifies the service name
offered by the remote node that is to be mapped to the LAT terminal
device specified by -ptty. The service name must conform to the rules
specified in the DESCRIPTION section. Identifies the remote node that
provides the service specified by -Vlearned_Service. The -H option is
optional when mapping an outgoing port. The remote node name must con‐
form to the rules specified in the DESCRIPTION section. Identifies the
name of the remote port on the remote node (remote_node) that provides
the service specified by -Vlearned_service. The -R option must be spec‐
ified with the -H option, but is optional. The remote port name must
conform to the rules specified in the DESCRIPTION section. Allows the
user to specify the password for the remote service that will be
accessed through the outgoing port. When the remote service to be
accessed has password checking enabled, this password is needed or the
connection is rejected. The password is not case sensitive and spaces
are disallowed.
When using the -w option, the password is specified on the com‐
mand line and is visible. When the -W option is used, the user
will be prompted for the password and it will not be echoed.
The -w option should be used when adding this command to the LAT
/etc/latstartup.conf startup file. When you use this method, it
is recommended that the /etc/latstartup.conf file have read and
write permission for root only.
To change (or remove) the password, delete the outgoing port
(latcp -D -ptty) and add it back with the new password (or with‐
out a password).
Adding a Reserved Service
Syntax: latcp-A-V reserved_service
Adds a reserved service on the host node. Specifies the name of the
reserved service to add. A reserved service is a permanent entry in
the learned services database. The reserved service name must conform
to the rules specified in the DESCRIPTION section.
If the reserved service does not exist, a new reserved service
is created. If the specified reserved service is an existing
learned service, the learned service is marked as a reserved
service.
Setting the Maximum Number of Learned Services
Syntax: latcp-ccount
Sets the maximum number of learned services in the local learned ser‐
vices database to count. The value of count can range from 0 to 1000.
The actual number of learned services can range from 1 to 1000. A
value of zero (0) indicates that the maximum number of learned services
is restricted by the amount of system memory. By default, the maximum
number of learned services is 100.
Deleting Services and Ports
Syntax: latcp-D { -aservice | -vreserved_service | -ptty_list }
Deletes a service or reserved service, or unmaps an application port or
outgoing port from the host node. You must specify either a service
(-a), a reserved service (-v), or a port (-p) with the -D option.
Specifies the service to be deleted. When a service is deleted, active
sessions associated with the service remain.
When a service is deleted, it is no longer available to terminal
server users. If a service name is not specified, an error mes‐
sage is generated. Specifies the name of the reserved service
to be deleted. When a reserved service is deleted, active ses‐
sions associated with the service remain.
When a reserved service is deleted, it is removed from the
learned service database on the host node. Unmaps the specified
list of LAT terminal devices from the application port or outgo‐
ing port to which they were bound. The list can be a single LAT
terminal device or a list of LAT terminal devices separated by
commas.
When you delete a bound interactive service the ttys bound to it
are unbound. If the ttys remain in the /etc/inittab file they
will become associated with any existing unbound interactive
services. For more information, see the description in the Bind‐
ing and Unbinding LAT Devices to Bound Interactive Services sec‐
tion.
If there is only one unbound interactive service running on the
system, you cannot delete it.
When an application port is unmapped, the port is unmapped from
its associated virtual terminal line; any active session remains
active.
Binding and Unbinding LAT Devices to Bound Interactive Services
Syntax: latcp [-ptty_list | -Ptty_list] [-aservice]
Binds (-p) or unbinds (-P) the specified list of LAT terminal devices
to the specified bound interactive service. The list can be a single
LAT terminal device or a list of LAT terminal devices separated by com‐
mas. The following example binds LAT devices 620, 621, 622, and 623 to
the bound interactive service siteapp. Not that only the last compo‐
nent of the LAT terminal devices needs to be specified (for example,
620 instead of /dev/lat/620). # latcp-p 620,621,622,623 -asiteapp
When you bind LAT terminal devices to a service, they cannot be
used for other services.
When LAT terminal devices are unbound from a bound interactive
service, the devices should be removed from the /etc/inittab
file before you unbind them. If the entries remain in the
/etc/inittab file after you unbind them from the service, the
getty process running on that device exits and is respawned.
When the getty process is respawned, the device becomes associ‐
ated with the existing unbound interactive services. If this
behavior is not desired, remove the entries from the /etc/init‐
tab file. Specifies the service to be bound or unbound.
Setting the Service Identification
Syntax: latcp-idescription -aservice
Sets the service identification to the specified value. The descrip‐
tion field can contain up to 64 characters. If the field contains more
than one word, you must enclose the string in double quotation marks
("). Specifies the service for which you are changing the service
identification.
The -aservice option is required. The service name must conform
to the rules specified in the DESCRIPTION section.
Enabling and Disabling Service Node Groups
Syntax: latcp [-glist | -Glist] -aservice
Enables (-g) and disables (-G) the service node groups specified in the
list. Group codes can range from 0 to 255. Group 0 is enabled by
default for all service nodes and servers. Specifies the service name.
The -aservice option is required. The service name must conform to the
rules specified in the DESCRIPTION section. The following example
specifies a single node group of 128 for the service siteapp: # latcp-g 128 -asiteapp
If you enter a group list, use commas (,) to separate individual
groups. The following example shows multiple node groups being
specified for the service transapp: # latcp-g
56,5,102,10,20,30,40,50,60,...,
110,150,200,210,255 -atransapp
If the string exceeds the width of the screen, it must wrap to
the following line. You cannot use a carriage return to break a
string. Note that the individual group codes are separated by
commas with no spaces.
Enabling and Disabling Node Agent Status
Syntax: latcp [-j | -J]
Enables (-j) and disables (-J) node agent status.
When a node tries to connect to a service that is not in its
learned service database, it transmits a solicit message to
request service information. When a node with node agent status
enabled receives a solicit message, the node responds with a
response information message containing the service information,
if it has information about the service.
By default, node agent status is disabled to reduce the amount
of network traffic from response information messages. You
should leave node agent status disabled for this reason.
Purging Non-Reserved Services
Syntax: latcp-Y
Purges all of the existing non-reserved learned services; reserved
learned services are not purged.
After the non-reserved learned services are purged, if the sys‐
tem receives a Service Announcement Message for a service, the
service is added to the learned service database.
Specifying Service Ratings
Syntax: latcp-xrating -aservice
Specifying a rating of -1 causes service ratings to be calculated
dynamically based on the node's activity. The service ratings are
placed in service announcement messages multicasted to all LAT nodes.
Specifying a rating of 0 through 255 causes the rating to be
static for the named service. Specifying a service rating of 0
makes the service less available to users; specifying 255 makes
the service highly available.
The default rating is dynamic. Specifies the service name. The
-aservice option is required. The service name must conform to
the rules specified in the DESCRIPTION section.
Setting the Node Name
Syntax: latcp-nnode
Sets the node name to the name specified with the node argument. The
node name specifies the name by which the node will be known. The node
name must be unique within the LAT network and must conform to the
rules specified in the DESCRIPTION section.
The default node name is the value of the utsname.nodename field
defined in <sys/utsname.h>. If the utsname.nodename field con‐
tains a period (.), the LAT node name is truncated to contain
the characters (16 characters maximum) that occur before the
first period.
Setting the Multicast Transmission Timer
Syntax: latcp-mtime
Sets multicast transmission timer to the specified time in seconds. A
node advertises its presence to other LAT nodes by sending out a multi‐
cast message over the network. The multicast timer determines the time
between the multicast messages. Valid intervals range from 10 to 180
seconds. (The default is 60 seconds.)
Displaying LAT Parameters on the Host Node
Syntax: latcp-d
Displays LAT characteristics on the host node. For example, the fol‐
lowing command shows the LAT parameters at their current setting: #
/usr/sbin/latcp -d
Node name: SERVICE1 Multicast timer: 60 seconds LAT version: 5
ECO: 2 Outgoing Port Groups: 0
Selected Interface Name(s): fza0 ln0 LAT Protocol is active Agent
Status: Disabled Maximum Number of Learned Services: 100
Service information
Service name: SERVICE1
Service ID: Tru64 UNIX Version n.n LAT SERVICE
Rating: Dynamic 255
Groups: 0
Service information
Service name: BOUNDSVC (Bound)
Service ID: Tru64 UNIX Version n.n LAT SERVICE
Rating: Dynamic 255
Groups: 0
Ports: 620
Service information
Service name: DEDICATED (Optional)
Service ID: Tru64 UNIX Version n.n LAT SERVICE
Rating: Dynamic 255
Groups: 0
A service without Bound or Optional next to the name is an
unbound interactive service. For bound services, the display
includes a Ports entry that shows the LAT terminal devices
(ttys) that are bound to the bound interactive service.
Displaying Learned Services
Syntax: latcp-d-l [-vlearned_service]
Displays LAT characteristics specified by the following option. Dis‐
plays current learned services. For example: # /usr/sbin/latcp -d -l
Number of Available Services: 98
Available Services:
Service Name Status Identification
ADJECT AVAILABLE Tru64 UNIX Version Vn.n LAT SERVICE ALFIKR
AVAILABLE Tru64 UNIX Version Vn.n LAT SERVICE ANDERSON AVAILABLE
Tru64 UNIX Version Xn.n LAT SERVICE ARCHIE AVAILABLE Tru64 UNIX
Version Vn.n LAT SERVICE Displays information about learned_service.
The learned service name must conform to the rules specified in the
DESCRIPTION section. For example: # /usr/sbin/latcp -d -l -vzipcode
Available Service: ZIPCODE
Node Name Status Rating Identification
ZIPCODE AVAILABLE 155 Tru64 UNIX Version Vn.n LAT SERVICE
Displaying LAT Characteristics for a Remote Node
Syntax: latcp-d-Hremote_node
Displays LAT characteristics specified by the following option. Dis‐
plays characteristics for remote_node. The remote node name must con‐
form to the rules specified in the DESCRIPTION section.
For example: # /usr/sbin/latcp -d -Hzipcode
LATCP Remote Node Characteristics for ZIPCODE
Ethernet Address: 08-00-2b-39-ba-c8 LAT version: 5
ECO: 2
Identification: Tru64 UNIX Version Vn.n LAT NODE
Node Groups: 0
Number of Available Services: 1
Available Services:
Service Name Status Identification
ZIPCODE AVAILABLE Tru64 UNIX Version Vn.n LAT SERVICE
Displaying LAT Counters for Remote Nodes
Syntax: latcp-d-C
Displays LAT characteristics specified by the following option. Dis‐
plays counter information for the remote nodes with which the host cur‐
rently has a virtual circuit. For example: # /usr/sbin/latcp -d -C
LATCP Server Counters for SERVER1
120 Seconds since last reset 0 Fwd out-of-seq messages
22 Run messages received 0 Retransmitted messages
26 Run messages transmitted 0 Bad circuit messages
20 Slots received 0 Bad circuit slots
22 Slots transmitted 0 Accepted host-initiated
104 Bytes received 0 Rejected host-initiated
0 Duplicate messages 0 Multiple nodes seen
Displaying LAT Counters for the Host Node
Syntax: latcp-d-N
Displays LAT characteristics specified by the following option. Dis‐
plays counter information for the local host node. For example: #
/usr/sbin/latcp -d -N
LATCP Node Counters
160020 Seconds since last reset 0 Fwd out-of-seq messages
283 Run messages received 0 Retransmitted messages
301 Run messages transmitted 0 Bad circuit messages
191 Slots received 0 Bad circuit slots
191 Slots transmitted 0 Accepted host-initiated
937 Bytes received 0 Rejected host-initiated
0 Duplicate messages 0 Multiple nodes seen
LATCP Node Statistics
2 Circuits created 0 Circuit timeouts
9 Sessions created 2826 Service messages xmit
285 Frames received 2826 Service messages recv
3130 Frames transmitted 2826 Service messages used
0 Illegal frames
LATCP Node Errors
0 Circuit Start 0 HIC Solicit
0 Circuit Run 0 HIC Response
0 Circuit Halt 0 HIC Command
0 Service Announcement 0 HIC Status
0 Other Message
Displaying Remote Node Addresses and Sessions
Syntax: latcp-d-S
Displays LAT characteristics specified by the following option. Dis‐
plays the address of the remote nodes and the number of sessions with
which the host currently has a virtual circuit. For example: #
/usr/sbin/latcp -d -S
LATCP Server Characteristics for MABBAM Ethernet address: 08-00-2B-
a3-90-85 Number of Active Circuits: 1 Number of Active Sessions: 1
Displaying Port Characteristics on the Host Node
Syntax: latcp-d-P [-ptty_list | -L | -I | -O]
Displays LAT characteristics specified by the following option. Dis‐
plays the characteristics for ports on the host node. If this option
is issued without an argument, all application ports, active interac‐
tive sessions, and outgoing ports on the host node are displayed.
Identifies the LAT terminal devices for which data is to be printed.
The list can be a single LAT terminal device or a list of LAT terminal
devices separated by commas. Do not use with the -L, -I, and -O
options. Sets the display of port characteristics to display all
application ports. Do not use with the -p, -I, and -O options. Sets
the display of port characteristics to display all interactive ports.
Do not use with the -p, -L, and -O options. Sets the display of port
characteristics to display all outgoing ports. Do not use with the -p,
-L, and -I options.
Adding and Removing Adapters
Syntax: latcp [-eadapter | -Eadapter]
Adds (-e) or removes (-E) the specified adapter to or from the list of
adapters over which LAT can run.
If no adapters are defined before you start LAT, latcp searches
for all suitable adapters and starts LAT on them. To prevent
this from occurring, you can define adapters in the /etc/lat‐
startup.conf file by including latcp-e commands for the spe‐
cific adapters.
If you remove an adapter, all active sessions running over the
adapter are terminated. If there is only one adapter on the
system, you cannot delete it. If you remove an adapter and add
another one, issue a latcp-s command to force a service
announcement message.
Note that LAT is not supported over NetRAIN virtual interfaces
or the adapters that compose NetRAIN sets.
Clearing LAT Counters
Syntax: latcp-z
Sets to zero all counters displayed by the -d -C and -d -N options. You
can test system performance over time by setting the counters to zero
and observing the information that accumulates.
Resetting LAT Parameters
Syntax: latcp-r
Resets the LAT parameters to the default values. See the -s option for
information.
All services (except the default service) are deleted. If that
service was an optional service, it is reset to a default ser‐
vice. The default service is an unbound interactive service
(added without the -o or -ptty_list options) which has the same
name as the LAT node name. This service is used for incoming
interactive connections to the Tru64 UNIX LAT host through getty
routines that are spawned in the /etc/inittab file.
Note
All learned services and reserved services are not removed from
the learned services database.
Enabling or Disabling Outgoing Port Groups
Syntax: latcp [-ulist | -Ulist]
Enables (-u) or disables (-U) the outgoing port groups specified in the
list. Outgoing port groups range from 0 to 255. Group 0 is enabled by
default.
If you enter a group list, use commas (,) to separate individual
groups. If the string exceeds the width of the screen, it must
wrap to the following line; do not use a carriage return to
break a string. Individual group codes are separated by commas
with no spaces. For example: # latcp-u 1,10,100,200
Outgoing port groups restrict access to services in the network
that belong to the specified groups. Your local system can
access only those service nodes associated with the outgoing
port groups specified.
DESCRIPTION
The latcp utility provides the essential functions for LAT control and
management. It allows nonprivileged users to display host, port, cir‐
cuit, and server information and privileged users to perform the fol‐
lowing tasks: Add, delete, change, and display service and port
attributes Add and delete network interface adapters Add, delete, and
display reserved services Bind and unbind LAT devices to specific ser‐
vices Map and unmap outgoing LAT devices to remote services Change the
node name Enable and disable node group codes, node agent status, and
outgoing port groups Purge non-reserved learned services Set and dis‐
play maximum number of learned services Display learned services Dis‐
play remote node information Change service rating Display and reset
counter information Start and stop the LAT driver
When LAT automatic startup and shutdown is enabled, the
/sbin/init.d/lat script is executed upon reaching run level 3. When
this script is executed, it reads and executes the latcp commands in
the /etc/latstartup.conf file (if it exists).
Note
If your system is a member of a cluster, you must create the /etc/lat‐
startup.conf file as a Context-Dependent Symbolic Link (CDSL). See the
System Administration guide for more information.
LAT automatic startup and shutdown can be enabled or disabled with the
latsetup utility. See the Network Administration: Connections manual
for additional information.
The latcp program only effects one operation per invocation. Therefore,
you can only specify one command on a command line.
For introductory information on LAT, see the lat_intro(7) reference
page.
Service, Node, and Port Names
Some of the options require that you specify a name for the service,
node, or port. The names can contain 1 to 16 of the following ASCII
characters: Uppercase letters A to Z Lowercase letters a to z
Lowercase letters are converted to uppercase. Digits 0 to 9
Period (.) Underscore (_) Hyphen (-)
You cannot use a hyphen as the first character.
FILES
Specifies the LAT control device.
SEE ALSO
Commands: llogin(1), latsetup(8)
NetworkServices: lat_intro(7), lat_manual_setup(7)
Network Administration: Connections
latcp(8)
