Deployment Guide

Defaults Core dumps for kernal and application crashes are stored in the local flash of the Control Processor CPU.
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
9.0(1.0) Introduced on the S5000.
Usage
Information
The switch supports full core dumps for kernel crashes. The kernel core dump applies to all CPUs and
is not enabled by default. To enable full kernel core dumps, enter the logging coredump command
in global configuration mode. The kernel core dump is copied to the Control Processor (CP) core-dump
directory: flash://CORE_DUMP_DIR/f10_cpu_timestamp.kcore.gz
Where cpu specifies a CPU and is one of the following values: cp (Control Processor), cp (Route
Processor), lp0 (line-card processor 0), lp1 (line-card processor 1), or lp2 (line-card processor 2);
timestamp is a text string in the format: yyyyddmmhhmmss (YearDayMonthHourMinuteSecond).
Because flash space may be limited, using the logging coredump server command ensures your
crash (application and kernel) files are uploaded successfully and completely to a server. Only a single
core-dump server can be configured. Configuration of a new core dump server over-writes any previously
configured server.
NOTE: You must disable logging coredump (no logging coredump command ) before you
configure a new server destination for core dumps.
When you enter the logging coredump server command, you are required to enter a password.
Use the password of the FTP server where the core files are to be copied. The password can be up to 15
characters; special characters are allowed. After you enter the password, an FTP URL is created with the
credentials in the operating system. The CLI monitors core dumps in the unit.
On the switch, when you enable core dumps of application and kernel crashes to be uploaded to an
FTP server, only core dumps from the Control Processor are uploaded to the server. Core-dump files
from the Route Processor and line-card CPUs are moved to flash memory on the Control Processor
CPU and can be accessed by performing an FTP to the Control Processor core-dump directory: flash://
CORE_DUMP_DIR/f10_cpu_timestamp.kcore.gz
login concurrent-session
Configures the limit of concurrent sessions for all users on console and virtual terminal lines.
Syntax
login concurrent-session {limit number-of-sessions | clear—line enable}
no login concurrent-session {limit number-of-sessions | clear—line enable}
Parameters
limit number-of-
sessions
Sets the number of concurrent sessions that any user can have on console and
virtual terminal lines. The range is from 1 to 12 (10 VTY lines, one console, and one
AUX line).
clear-line enable
Enables you to clear your existing sessions.
Defaults Not configured. You can use all the available sessions.
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Control and Monitoring 87