Service manual

88 Cyclades ACS 5000 Advanced Console Server Command Reference Guide

the parameter s1.data_buffering, though the value cannot be zero since a zero value turns off

data buffering.

The conf.nfs_data_buffering parameter format is,

For example, if data buffering is enabled for port 1, the data is stored in the file ttyS1.data in local

directory /var/run/DB or in remote server indicated by conf.nfs_data_buffering.

Ramdisk

Data buffering files are created in the directory /var/run/DB. If the parameter s<nn>.alias is

configured for the port <nn>, this name is used. For example, if the alias is called fremont_server,

the data buffering file is named fremont_server.data.

Linear vs. Circular buffering

For local data buffering, this parameter allows users to buffer data in either a circular or linear

fashion. Circular format (cir) is a revolving buffer file that is overwritten whenever the limit of the

buffer size (set by all.data_buffering) is reached. In linear format (lin), data transmission between

the remote device and the serial port ceases once the 4k bytes Rx buffer in the kernel is reached.

Then if a session is established to the serial port, the data in the buffer is shown

(all.dont_show_DBmenu or sxx.dont_show_DBmenu must be 2), cleared and data transmission is

resumed. Linear buffering is impossible if flow control is set to none. Default is cir.

To configure data buffering:

1. Execute the following command to configure data buffering. Refer to Table 5.12 for the

configuration parameters.

cli> config physicalports all databuffering [parameter] <value>

2. Activate and save your configuration.

Table 5.12: Data Buffering Configuration Parameters

Parameter Value Description

bufferonlynosession no|yes Buffer only when connected to the serial port.

buffersyslogonlynose

ssion

no|yes Only syslog is buffered.

desttype local | remote Define the data buffering location.

filesize <file size in bytes> Defines the maximum size of the data buffer file. This

parameter must be greater than zero otherwise all

parameters relating to data buffering are disregarded.

mode cir | lin Choose between circular or linear data buffering.

nfspath <pathname> Define the NFS path.