Dell PowerConnect B - MLXe 16, Hardware Installation Manual

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146 PowerConnect B-MLXe Hardware Installation Guide
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Loading and saving configuration files
6
QoS priorities for NI-MLX-1Gx48-T modules
You can configure more ports in the system by changing the QoS per-port priorities from 8 to 4. This
enables the device to support 2016 ports using 4 priorities per port.
Loading and saving configuration files
For easy configuration management, the router supports both the download and upload of
configuration files between the router and a TFTP server on the network. You can also copy the
startup configuration file locally between the management module’s code flash and a PCMCIA
flash card inserted in management module slot 1 or 2.
You can upload either the startup configuration file or the running configuration to the TFTP server,
code flash, or a flash card for backup and use in booting the system.
•
Startup configuration file – This file (startup-config) contains the configuration information that
is currently saved. To display this file, enter the show configuration command at any CLI
prompt.
•
Running configuration – This active configuration is in the system RAM but not yet saved to
code flash. These changes could represent a short-term requirement or general configuration
change. To display this configuration, enter the show running-config or write terminal command
at any CLI prompt.
Each device can have one startup configuration file and one running configuration. The startup
configuration file is shared by both flash modules. The running configuration resides in DRAM.
Configuring file size for startup and running configuration
The system allocates 8 MB of contiguous memory per session (console, TELNET, SSH) for
processing different configuration commands, such as show run, config terminal, and copy tftp run.
In a low memory state, memory is generally fragmented resulting in a failure to allocate contiguous
memory to support the session. We now pre-allocate one configuration buffer so that at least one
CLI session will remain operational even in low memory condition.
NOTE
The low memory condition is not a normal operating condition, and may indicate scaling the network
beyond system max limits. However, this feature ensures that one CLI session remains operational
so that the user can take suitable actions to recover from the condition.
To specify a configuration file size for both startup and running configuration, enter the following
command:
PowerConnect(config)# system-max
Syntax: [no] system-max [config-file-size < decimal >]
By default, no system-max parameter is configured.
The config-file-size option specifies the configuration file size for processing various commands.
The decimal parameter specifies the range supported for configuring file size. The minimum
configuration is 2 MB, and the maximum is 16 MB. If the file size is not configured, the default size
of 8 MB is used.