- Information About Terminal Settings and Sessions
- Licensing Requirements for Terminal Settings and Sessions
- Configuring the Console Port
- Configuring the COM1 Port
- Configuring Virtual Terminals
- Configuring Modem Connections
- Clearing Terminal Sessions
- Displaying Terminal and Session Information
- Default Settings for File System Parameters
- Additional References for Terminal Settings and Sessions
Configuring Terminal Settings and Sessions
This chapter describes how to manage the terminal settings and sessions on a Cisco NX-OS device.
This chapter includes the following sections:
- Information About Terminal Settings and Sessions
- Licensing Requirements for Terminal Settings and Sessions
- Configuring the Console Port
- Configuring the COM1 Port
- Configuring Virtual Terminals
- Configuring Modem Connections
- Clearing Terminal Sessions
- Displaying Terminal and Session Information
- Default Settings for File System Parameters
- Additional References for Terminal Settings and Sessions
Information About Terminal Settings and Sessions
This section includes information about terminal settings and sessions.
Terminal Session Settings
The Cisco NX-OS software features allow you to manage the following characteristics of terminals:
- Terminal type
- Name used by Telnet when communicating with remote hosts
- Length
- Number of lines of command output displayed before pausing
- Width
- Number of characters displayed before wrapping the line
- Inactive session timeout
- Number of minutes that a session remains inactive before the device terminates it
Console Port
The console port is an asynchronous serial port that allows you to connect to the device for initial configuration through a standard RS-232 port with an RJ-45 connector. Any device connected to this port must be capable of asynchronous transmission. You can configure the following parameters for the console port:
- Data bits
- Specifies the number of bits in an 8-bit byte that is used for data.
- Inactive session timeout
- Specifies the number of minutes a session can be inactive before it is terminated.
- Parity
- Specifies the odd or even parity for error detection.
- Speed
- Specifies the transmission speed for the connection.
- Stop bits
- Specifies the stop bits for an asynchronous line.
Configure your terminal emulator with 9600 baud, 8 data bits, 1 stop bit, and no parity.
COM1 Port
A COM1 port is an RS-232 port with a DB-9 interface that enables you to connect to an external serial communication device such as a modem. You can configure the following parameters for the COM1 port:
- Data bits
- Specifies the number of bits in an 8-bit byte that is used for data.
- Hardware flowcontrol
- Enables the flow-control hardware.
- Parity
- Specifies the odd or even parity for error detection.
- Speed
- Specifies the transmission speed for the connection.
- Stop bits
- Specifies the stop bits for an asynchronous line.
Configure your terminal emulator with 9600 baud, 8 data bits, 1 stop bit, and no parity.
Virtual Terminals
You can use virtual terminal lines to connect to your Cisco NX-OS device. Secure Shell (SSH) and Telnet create virtual terminal sessions. You can configure an inactive session timeout and a maximum sessions limit for virtual terminals.
Modem Support
You can connect a modem to the COM1 or console ports on the supervisor module. The following modems were tested on devices running the Cisco NX-OS software:
- MultiTech MT2834BA (http://www.multitech.com/en_us/support/families/multimodemii/)
- Hayes Accura V.92 (http://www.zoom.com/products/dial_up_external_serial.html#hayes)
Note |
Do not connect a modem when the device is booting. Only connect the modem when the device is powered-up. |
The Cisco NX-OS software has the default initialization string (ATE0Q1&D2&C1S0=1\015) to detect connected modems. The default string is defined as follows:
- AT
- Attention
- E0 (required)
- No echo
- Q1
- Result code on
- &D2
- Normal data terminal ready (DTR) option
- &C1
- Enable tracking the state of the data carrier
- S0=1
- Pick up after one ring
- \015 (required)
- Carriage return in octal
Licensing Requirements for Terminal Settings and Sessions
The following table shows the licensing requirements for this feature:
Product |
License Requirement |
---|---|
Cisco NX-OS |
Terminal setting configuration requires no license. Any feature not included in a license package is bundled with the Cisco NX-OS system images and is provided at no extra charge to you. For a complete explanation of the Cisco NX-OS licensing scheme, see the . |
Configuring the Console Port
You can set the following characteristics for the console port:
Log in to the console port.
1. configure terminal
2. line console
3. databits bits
4. exec-timeout minutes
5. parity {even | none | odd}
6. speed {300 | 1200 | 2400 | 4800 | 9600 | 38400 | 57600 | 115200}
7. stopbits {1 | 2}
8. exit
9. (Optional) show line console
10. (Optional) copy running-config startup-config
DETAILED STEPS
Configuring the COM1 Port
You can set the following characteristics for the COM1 port:
Log in to the console port or COM1 port.
1. configure terminal
2. line com1
3. databits bits
4. flowcontrol hardware
5. parity {even | none | odd}
6. speed {300 | 1200 | 2400 | 4800 | 9600 | 38400 | 57600 | 115200}
7. stopbits {1 | 2}
8. exit
9. (Optional) show line com1
10. (Optional) copy running-config startup-config
DETAILED STEPS
Configuring Virtual Terminals
This section describes how to configure virtual terminals on Cisco NX-OS devices.
Configuring the Inactive Session Timeout
You can configure a timeout for inactive virtual terminal sessions on a Cisco NX-OS device.
1. configure terminal
2. line vty
3. exec-timeout minutes
4. exit
5. (Optional) show running-config all | begin vty
6. (Optional) copy running-config startup-config
DETAILED STEPS
Configuring the Session Limit
You can limit the number of virtual terminal sessions on your Cisco NX-OS device.
1. configure terminal
2. line vty
3. session-limit sessions
4. exit
5. (Optional) show running-config all | being vty
6. (Optional) copy running-config startup-config
DETAILED STEPS
Configuring Modem Connections
You can connect a modem to either the COM1 port or the console port.
We recommend that you use the COM1 port to connect the modem.
- Enabling a Modem Connection
- Downloading the Default Initialization String
- Configuring and Downloading a User-Specified Initialization String
- Initializing a Modem for a Powered-Up Cisco NX-OS Device
Enabling a Modem Connection
You must enable the modem connection on the port before you can use the modem.
Log in to the console port.
1. configure terminal
2. Enter one of the following commands:
3. modem in
4. exit
5. (Optional) show line
6. (Optional) copy running-config startup-config
DETAILED STEPS
Downloading the Default Initialization String
The Cisco NX-OS software provides a default initialization string that you can download for connecting with the modem. The default initialization string is ATE0Q1&D2&C1S0=1\015.
Log in to the console port.
1. configure terminal
2. Enter one of the following commands:
3. modem init-string default
4. exit
5. (Optional) show line
6. (Optional) copy running-config startup-config
DETAILED STEPS
Command or Action | Purpose | |||||||
---|---|---|---|---|---|---|---|---|
Step 1 | configure terminal Example: switch# configure terminal switch(config)# |
Enters global configuration mode. |
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Step 2 | Enter one of the following commands:
Example: switch# line com1 switch(config-com1)# |
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Step 3 | modem init-string default Example: switch(config-com1)# modem init-string default |
Writes the default initialization string to the modem. |
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Step 4 | exit Example: switch(config-com1)# exit switch(config)# |
Exits COM1 or console configuration mode. |
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Step 5 | show line Example: switch(config)# show line |
(Optional) Displays the COM1 and console settings. |
||||||
Step 6 | copy running-config startup-config Example: switch(config)# copy running-config startup-config |
(Optional) Copies the running configuration to the startup configuration. |
Configuring and Downloading a User-Specified Initialization String
You can configure and download your own initialization when the default initialization string is not compatible with your modem.
Log in to the console port.
1. configure terminal
2. Enter one of the following commands:
3. modem set-string user-input string
4. modem init-string user-input
5. exit
6. (Optional) show line
7. (Optional) copy running-config startup-config
DETAILED STEPS
Command or Action | Purpose | |||||||
---|---|---|---|---|---|---|---|---|
Step 1 | configure terminal Example: switch# configure terminal switch(config)# |
Enters global configuration mode. |
||||||
Step 2 | Enter one of the following commands:
Example: switch# line com1 switch(config-com1)# |
|||||||
Step 3 | modem set-string user-input string Example: switch(config-com1)# modem set-string user-input ATE0Q1&D2&C1S0=3\015 |
Sets the user-specified initialization string for the COM1 or console port. The initialization string is alphanumeric and case sensitive, can contain special characters, and has a maximum of 100 characters.
|
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Step 4 | modem init-string user-input Example: switch(config-com1)# modem init-string user-input |
Writes the user-specified initialization string to the modem connected to the COM1 or console port. |
||||||
Step 5 | exit Example: switch(config-com1)# exit switch(config)# |
Exits COM1 or console configuration mode. |
||||||
Step 6 | show line Example: switch(config)# show line |
(Optional) Displays the COM1 and console settings. |
||||||
Step 7 | copy running-config startup-config Example: switch(config)# copy running-config startup-config |
(Optional) Copies the running configuration to the startup configuration. |
Initializing a Modem for a Powered-Up Cisco NX-OS Device
If you connect a modem to a powered-up physical device, you must initialize the modem before you can use it.
After waiting until the Cisco NX-OS device has completed the boot sequence and the system image is running, connect the modem to either the COM1 port or the console port on the device.
Enable the modem connection on the port.
1. modem connect line {com1 | console}
DETAILED STEPS
Command or Action | Purpose | |
---|---|---|
Step 1 | modem connect line {com1 | console} Example: switch# modem connect line com1 |
Initializes the modem connected to the device. |
Clearing Terminal Sessions
You can clear terminal sessions on the Cisco NX-OS device.
1. (Optional) show users
2. clear line name
DETAILED STEPS
Command or Action | Purpose | |
---|---|---|
Step 1 | show users Example: switch# show users |
(Optional) Displays the user sessions on the device. |
Step 2 | clear line name Example: switch# clear line pts/0 |
Clears a terminal session on a specific line. The line name is case sensitive. |
Displaying Terminal and Session Information
To display terminal and session information, perform one of the following tasks:
Command |
Purpose |
---|---|
show terminal | Displays terminal settings. |
show line | Displays the COM1 and console ports settings. |
show users | Displays virtual terminal sessions. |
show running-config [all] | Displays the user account configuration in the running configuration. The all keyword displays the default values for the user accounts. |
For detailed information about the fields in the output from these commands, see the .
Default Settings for File System Parameters
Parameters |
Default |
---|---|
Default filesystem |
bootflash: |
Additional References for Terminal Settings and Sessions
Related Documents for Terminal Settings and Sessions
Related Topic |
Document Title |
---|---|
Licensing |
Cisco NX-OS Licensing Guide |
Command reference |
Cisco Nexus 3000 Command Reference |