Network Engineering Asked by ymudyruc on September 30, 2021
Trying to connect to a Cisco router, in purpose to learn Cisco skills that could help me finding a job. So, I plugged a cable in the rj45 Console (blue) port of a Cisco 888 router, and other end into serial port. On Debian 10, I installed minicom
, then searched for serial tty:
sudo dmesg | grep tty
[ 0.108074] console [tty0] enabled
[ 4.648840] 00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 4.669401] 00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
So I set up minicom to use /dev/ttyS0
, with 9600 bauds/8N1, and saved this configuation as cisco
.
However, when launching sudo minicom cisco
, nothing particular happens:
Welcome to minicom 2.7.1
OPTIONS: I18n
Compiled on May 6 2018, 08:43:56.
Port /dev/ttyS0, 09:17:07
Press CTRL-A Z for help on special keys
CTRL-A Z for help | 9600 8N1 | NOR | Minicom 2.7.1 | VT102 | Offline | ttyS0
Tried to reset the router (with the physical button), restarting it, unplug and replug the serial cable… but nothing happened.
==> How to initiate communication with the router ? Isn’t it automatically launching a terminal when connecting to it over serial console cable ?
Isn't it automatically launching a terminal when connecting to it over serial console cable ?
Answer : no.
Simply need to reboot the router (eg power off and on), so it begins sending serial stuff to console port.
Correct answer by ymudyruc on September 30, 2021
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