linux connect to serial console of 3com switch
Where I state in title and this article "3com switch" I really mean to say "the 3com Superstack Switch 3300 model 3c16980A"Configuring a 3Com switch is done through the serial console.
We need:
- well-running linux system
- Serial port on Linux machine
- Serial Null-modem cable (female-female)
- program minicom installed.
We start
- by identifying what device the serial connection is.
Typically the windows-equivalent of com1: is /dev/ttyS0, (com2: -> /dev/ttyS1; com3: -> ttyS2 (you get my point I hope)) - connect the serial null-modem cable to 3com serial port (male connector) identifieable through label "console". Connect other end to computer serial port.
- power up 3com switch
- Now we configure minicom:
- start minicom program as ordinary user within a sudo-enabled system:
sudo minicom -s
(eventually enter password to activate sudo), or as root:minicom -s
- Select (evt. using mouse and [Enter]) "Serial port setup"
- Select "A - Serial Device" (press "A") and enter the device name of your serial port adapter (/dev/ttyS0 in my case).
- Select "E - Bps/Par/Bits" (by pressing key "E")
- Select "F: 19200" (press "F"
- Select "Q: 8-N-1" (press Q)
- Press [Enter] to return to previous level
- Select "F: 19200" (press "F"
- Disable Flow control by choosing "F - Hardware Flow Control", and "G - Software Flow Control" (press "F" c.q. "G") untill both values display "Off".
- Press [Enter] to return to previous level
- Select "A - Serial Device" (press "A") and enter the device name of your serial port adapter (/dev/ttyS0 in my case).
- Select (using cursor keys and [Enter]) "Modem and dialing"
- Disable modem DCD line by choosing "R - Modem has DCD line" (press "R") untill value displays "Off".
- Press [Enter] to return to previous level
- Disable modem DCD line by choosing "R - Modem has DCD line" (press "R") untill value displays "Off".
- Save configuration for future use: (using cursor keys and [Enter]) by selecting "Save setup as.." and entering the configuration-name to save as (I used "3com"). This will cause a file "/etc/minicom/minirc.3com" to be created with the settings (only if you started the minicom -s as root (or using sudo)).
- Start working by selecting "Exit" (using cursor keys and [Enter] or by pressing the [End] key on the keyboard).
- working should result in (you might have to press [Enter] once or twice for the login to appear) the login-prompt to be displayed... (and now you should follow 3-com instructions).
- start minicom program as ordinary user within a sudo-enabled system:
- To leave minicom, Press the sequence [Ctrl]+A followed by X.
We return (at a later stage) to re-use the saved configuration, by activating the program through
minicom 3com
Good configuration!
posted by Dieter @ 18:33
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