Extreme Networks ExtremeWare XOS 11.3, Manual

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Managing the Switch
ExtremeWare XOS 11.3 Concepts Guide
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Eight shell sessions
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Eight Telnet sessions
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Eight Trivial File Transfer Protocol (TFTP) sessions
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Eight SSH2 sessions
Understanding the ExtremeWare XOS Shell
When you log in to ExtremeWare XOS from a terminal, you enter the shell with a shell prompt
displayed. At the prompt, you input the commands to be executed on the switch. After the switch
processes and executes a command, the results are relayed to and displayed on your terminal.
The shell supports ANSI, VT100, and XTERM terminal emulation and adjusts to the correct terminal
type and window size. In addition, the shell supports UNIX-style page view for page-by-page
command output capability.
By default, up to eight active shell sessions can access the switch concurrently; however, you can change
the number of simultaneous, active shell sessions supported by the switch. You can configure up to 16
active shell sessions. Configurable shell sessions include both Telnet and SSH connections (not console
CLI connections). If only eight active shell sessions can access the switch, a combination of eight Telnet
and SSH connections can access the switch even though Telnet and SSH each support eight connections.
For example, if you have six Telnet sessions and two SSH sessions, no one else can access the switch
until a connection is terminated or you access the switch via the console.
If you configure a new limit, only new incoming shell sessions are affected. If you decrease the limit
and the current number of sessions already exceeds the new maximum, the switch refuses only new
incoming connections until the number of shell session drops below the new limit. Already connected
shell sessions are not disconnected as a result of decreasing the limit.
To configure the number of shell sessions accepted by the switch, use the following command:
configure cli max-sessions
For more information about the line-editing keys that you can use with the XOS shell, see “Line-Editing
Keys” on page 43 .
Using the Console Interface
The CLI built into the switch is accessible by way of the 9-pin, RS-232 port labeled console , located on
the front of the Management Switch Fabric Module (MSM).
NOTE
For more information on the console port pinouts, see the hardware installation guide that shipped with your switch.
After the connection has been established, you see the switch prompt and you can log in.