什麼是 Console Switch ,有些設備(通常是沒有 VGA 輸出的裝置,如 switch , Storage …)提供 Console 介面用以提供初次設定或是使用指令介面.但如果是實驗室或是大型機房,不可能找到這麼多電腦有 console (tty 或是 USB serial port) ,這時候可以透過 Console Switch .
使用上也很簡單只需要透過乙太網路就可以同時連接多個序列裝置(serial port).
參考文件 : https://www.digi.com/resources/documentation/digidocs/pdfs/90001535.pdf
設定 Console Switch 固定 IP
Terminal Console (Port 16) 設定:
- VT-100
- 9600 baud
- 8-bit characters
- 1 stop bit
- No Parity
- Software flow control
# set config ip=172.16.0.4 # set config submask=255.255.255.0 # set config gateway=172.16.0.254 # set ports range=1-16 dev=prn # set line range=1-12 baud=115200 # set config # boot action=reset
Console Switch Terminal connections 設定
指令:
set line [Options...]
Sets/displays serial line parameters table entries.
Available bauds are: 75,110,134,150,200,300,600,1200,1800,2400,4800,9600,14400,19200,28800,38400,57600,76800,115200
範例 : 將 Port 13~16 連線 baud rate 設定為 115200
telnet 172.16.0.4,23 user: root , password: dbps #> set line serial# baud csize parity stopb break error inpck istrip onlcr otab 1 115200 8 N 1 ignore null off off off off 2 115200 8 N 1 ignore null off off off off 3 115200 8 N 1 ignore null off off off off 4 115200 8 N 1 ignore null off off off off 5 115200 8 N 1 ignore null off off off off 6 115200 8 N 1 ignore null off off off off 7 115200 8 N 1 ignore null off off off off 8 115200 8 N 1 ignore null off off off off 9 115200 8 N 1 ignore null off off off off 10 115200 8 N 1 ignore null off off off off 11 115200 8 N 1 ignore null off off off off 12 115200 8 N 1 ignore null off off off off 13 9600 8 N 1 ignore null off off off off 14 9600 8 N 1 ignore null off off off off 15 9600 8 N 1 ignore null off off off off 16 9600 8 N 1 ignore null off off off off
#> set line range=13-16 baud=115200
#> set line serial# baud csize parity stopb break error inpck istrip onlcr otab 1 115200 8 N 1 ignore null off off off off 2 115200 8 N 1 ignore null off off off off 3 115200 8 N 1 ignore null off off off off 4 115200 8 N 1 ignore null off off off off 5 115200 8 N 1 ignore null off off off off 6 115200 8 N 1 ignore null off off off off 7 115200 8 N 1 ignore null off off off off 8 115200 8 N 1 ignore null off off off off 9 115200 8 N 1 ignore null off off off off 10 115200 8 N 1 ignore null off off off off 11 115200 8 N 1 ignore null off off off off 12 115200 8 N 1 ignore null off off off off 13 115200 8 N 1 ignore null off off off off 14 115200 8 N 1 ignore null off off off off 15 115200 8 N 1 ignore null off off off off 16 115200 8 N 1 ignore null off off off off #> quit
Console Switch (解鎖 console)
有時候 telnet 完之後沒有正常關閉會造成 Connection refused ,可以透過下面方式來解鎖.
telnet 172.16.0.4,23 user: root , password: dbps #> who TTY user Connected from Connected to sessions 3 in use 4 in use 5 in use 6 in use 7 in use 8 in use 9 in use 10 in use 11 in use 12 in use 17 Telnet 172.16.0.144 direct_tty10 0 18 Telnet 172.16.0.144 direct_tty11 0 19 Telnet 172.16.0.144 direct_tty09 0 20 Telnet 172.16.0.144 direct_tty12 0 21 Telnet 172.16.1.58 direct_tty05 0 22 Telnet 172.16.1.58 direct_tty06 0 23 Telnet 172.16.0.144 direct_tty08 0 24 Telnet 172.16.0.219 direct_tty03 0 25 Telnet 172.16.0.219 direct_tty04 0 26 root 172.16.0.219 local shell 0 27 Telnet 172.16.0.144 direct_tty07 0
Command:
kill (tty#)[-(tty#)]
kill – Reset/Initialize the specified tty device to its default state.
解鎖 Physical port tty03 & tty04 從剛剛的查詢可以看到對應到 TTY 24 ,25.
#> kill 24 #> kill 25 #> quit