TCL Script: Ping

Difficulty Rating:

Practical use case:

To see what has connectivity in the network

Scenario:

IGP and EGP routing protocols have converged and are stable.

You now want to perform end-to-end connectivity testing to check for faults using ping (or traceroute)

Instructions:

1. On each device run the command #show ip alias. This will list all IP addresses configured on the device.
   
2. Select all IP addresses listed to copy them on each device. This can normally be done on most common terminal emulation programs by holding down the ALT key before making a selection. This will build up a list of every IP address in your network.
3. Enter the TCL Shell on the device by running the command #tclsh.
4. Enter the following command in the TCL Shell:
   foreach address {
5. Paste in all the addresses from all devices in the network that have been copied
6. Enter the following commands in the TCL Shell:
   } {ping $address}
   
7. This will now ping all IP’s in the $address array with the default ping settings.
8. Note: You can change ping command parameters such as specifying a source address, repeat count etc. After the “ping $address” add “source <source address>“