Cisco IOS Scripting with Tcl

Detail here:
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gt_tcl.html

SUMMARY STEPS

1. enable

2. configure terminal

3. scripting tcl encdir location-url

4. scripting tcl init init-url

5. exit

6. tclsh

7. Enter the required Tcl command language syntax.

8. ios_config "cmd" "cmd-option"

9. exec "exec-cmd"

10. exit

Example:

Router1# tclsh
Router1(tcl)#
Router1(tcl)#foreach address {
+>(tcl)#172.16.1.1
+>(tcl)#172.16.3.1
+>(tcl)#} {
+>(tcl)#ping $address }