Скачать или смотреть Master TCL Scripts on Cisco IOS – Automate Tasks & Boost Productivity Like a Pro!

Example 1 – Basic TCL Script: Ping Automation**

```tcl
tclsh
foreach ip {8.8.8.8 1.1.1.1 9.9.9.9} {
puts "Pinging $ip..."
exec ping $ip repeat 5
}
tclquit
```

*YouTube Description explanation:*

`tclsh` → Enters TCL shell on the Cisco device.
`foreach ip {...}` → Creates a loop to test multiple IPs.
`{8.8.8.8 ...}` → List of IP addresses you want to ping.
`puts ...` → Prints text to the screen (like a log message).
`exec ping $ip repeat 5` → Executes the normal CLI command; `$ip` is replaced with each IP.
`tclquit` → Exits the TCL shell and returns to IOS CLI.

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🔧 *Example 2 – TCL Script to Save Output to Flash*

```tcl
tclsh
set fh [open "flash:test.txt" w]
foreach cmd {show version show ip interface brief} {
puts $fh "===== $cmd ====="
puts $fh [exec $cmd]
}
close $fh
tclquit
```

*Explanation:*

`set fh ...` → Creates a file handle `fh` for writing to `flash:test.txt`.
`foreach cmd {...}` → Loop through a list of commands.
`puts $fh` → Writes text into the file.
`[exec $cmd]` → Executes IOS command and returns the output.
`close $fh` → Saves and closes the file.
`tclsh / tclquit` → Start and end the TCL shell.

---

🔧 *Example 3 – Auto Backup Running Config*

```tcl
tclsh
set t [clock format [clock seconds] -format "%Y%m%d-%H%M"]
set fh [open "flash:backup_$t.cfg" w]
puts $fh [exec show running-config]
close $fh
tclquit
```

*Explanation:*

`clock format ...` → Gets current date/time in a nice format.
`set t ...` → Saves that formatted time in variable `t`.
`open "flash:backup_$t.cfg"` → Creates a unique filename.
`exec show running-config` → Dumps the running config.
`puts $fh [...]` → Writes config into the file.
`close` → Finalizes file, ready for download.

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