Technical data

Brocade 6910 Ethernet Access Switch Diagnostic Guide 51
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Telnet and SSH connections
• If you erase a tacacs-server host command (by entering the no form of the command), make
sure you also erase the authentication login commands that specify only TACACS or TACACS+
as an authentication method. Otherwise, when you exit from the CONFIG mode or from a Telnet
session, the system continues to believe that TACACS or TACACS+ is enabled and you will not
be able to access the system.
• TACACS+ command authorization can be performed only for commands entered from Telnet or
SSH sessions, or from the console. No authorization is performed for commands entered at
the Web management interface.
Telnet and SSH connections
The first time you log on to the console port, you must use a serial connection in order to assign an
IP address to the port. Once an IP address is assigned, you can access the CLI through a local
Telnet, SSH, or SNMP connection through the management port. When accessing the CLI through
Telnet, you may be prompted for a password. By default, the password required is the one you enter
for general access at initial setup.
NOTE
Telnet, Web, and SNMP servers are enabled by default, but can be disabled selectively. SSH is
disabled by default.
Telnet and SSH show commands
show ip telnet
Syntax: show ip telnet
This command shows you the Telnet configuration settings. Command output resembles the
following example.
Console# show ip telnet
IP Telnet Configuration:
Telnet Status: Enabled
Telnet Service Port: 23
Telnet Max Session: 8
Use the show users command to display the number of open Telnet sessions at any given time,
including information about each session.
Configuration notes
• You can use the authentication login command to select a sequence of authentication
methods for each type of access to a device (CLI through Telnet, CLI Normal Exel and CLI
Privileged Exec levels). Use the authentication enable command to specify the sequence of
authentication methods to use when changing from Normal Exec command mode to Privileged
Exec command mode with the enable command.