---
name: "ltpdriver"
section: "1"
platform: "linux"
package: "ion"
version: "3.2.1+dfsg-1.1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/ltpdriver"
---

# ltpdriver(1)

LTP transmission test program

## NAME

ltpdriver - LTP transmission test program

## SYNOPSIS

**ltpdriver** *remoteEngineNbr* *clientId* *nbrOfCycles* *greenLength* \[ *totalLength*\]

## DESCRIPTION

**ltpdriver** uses LTP to send *nbrOfCycles* service data units of length indicated by *totalLength*, of which the trailing *greenLength* bytes are sent unreliably, to the **ltpcounter** client service process for client service number *clientId* attached to the remote LTP engine identified by *remoteEngineNbr*.  If omitted, *length* defaults to 60000.  If *length* is 1, the sizes of the transmitted service data units will be randomly selected multiples of 1024 in the range 1024 to 62464.

Whenever the size of the transmitted service data unit is less than or equal to *greenLength*, the entire SDU is sent unreliably.

When all copies of the file have been sent, **ltpdriver** prints a performance report.

## EXIT STATUS

- "0"

  **ltpdriver** has terminated.  Any problems encountered during operation will be noted in the **ion.log** log file.

- "1"

  **ltpdriver** was unable to start, because it could not attach to the LTP protocol on the local node.  Run **ltpadmin** to start LTP, then try again.

## FILES

The service data units transmitted by **ltpdriver** are sequences of text obtained from a file in the current working directory named "ltpdriverAduFile", which **ltpdriver** creates automatically.

## ENVIRONMENT

No environment variables apply.

## DIAGNOSTICS

Diagnostic messages produced by **ltpdriver** are written to the ION log file *ion.log*.

- ltpdriver can't initialize LTP.

  **ltpadmin** has not yet initialized LTP protocol operations.

- Can't create ADU file

  Operating system error.  Check errtext, correct problem, and rerun.

- Error writing to ADU file

  Operating system error.  Check errtext, correct problem, and rerun.

- ltpdriver can't create file ref.

  ION system error.  Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun.

- ltpdriver can't create ZCO.

  ION system error.  Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun.

- ltpdriver can't send message.

  LTP span to the remote engine has been stopped.

- ltp\_send failed.

  LTP system error.  Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun.

## BUGS

Report bugs to \<ion-bugs@korgano.eecs.ohiou.edu\>

## SEE ALSO

[*ltpadmin*(1)](/ltpadmin/1.md), [*ltpcounter*(1)](/ltpcounter/1.md), [*ltp*(3)](/ltp/3.md)