Write a Tcl script in a notepad.
foreach ipaddress {
192.168.1.1
192.168.2.1
172.23.23.1
172.23.24.1
10.1.1.1
10.1.2.1
} { ping $ipaddress }
192.168.1.1
192.168.2.1
172.23.23.1
172.23.24.1
10.1.1.1
10.1.2.1
} { ping $ipaddress }
From R1 type "tclsh" to enter Tcl shell. Enter the script and press enter.
Be sure to type "tclquit" after the script has run.
keep a copy of the Tcl script in a text file so that you can just paste it
into the router to test connectivity at any time. The extra time it
takes to create/modify the text file is much less than the time it would
take to type “ping x.x.x.x” for each device. You are also less likely
to forget a device.