Simple TCL Ping Script

Doing ping tests for lots of IP addresses can be tiring since you can't paste all the ping commands at the same time. You have to do it one at a time. All you need is Patience or you can opt for a TCL scripting language which is already available in Cisco IOS 12.2(25). At first, I thought you need to learn TCL scripting to be a CCIE but nah! :) All you need is the basics and if you are interested learning more about TCL you can click here. To access the tcl command line in Cisco router issue the "tclsh" command. For the ping script just modify the ip addresses what is shown below and it should be good.

foreach address {
1.1.1.1
2.2.2.2
3.3.3.3
4.4.4.4
5.5.5.5
6.6.6.6
} { puts [ exec "ping $address" ] }

The word "address" here is just a variable, you can substitute this with anything you want. Now lets try applying this to the Cisco router.

R0#tclsh
R0(tcl)#foreach address {
+>(tcl)#1.1.1.1
+>(tcl)#2.2.2.2
+>(tcl)#3.3.3.3
+>(tcl)#4.4.4.4
+>(tcl)#5.5.5.5
+>(tcl)#6.6.6.6
+>(tcl)#} { puts [ exec "ping $address" ] }

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/44/100 ms

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/27/56 ms

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/26/96 ms

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/27/52 ms

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/27/96 ms

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 6.6.6.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/32/84 ms

How cool is that!!! This script can be useful when you are doing your CCIE lab exams as they say, when you want to verify that every subnet in your lab routers are reachable. You can try this in your own Dynamips lab. This should be safe to be done in the production routers but where I work, I doubt if this will be allowed by the company's IT policy. :P