TCL'ing Your Router

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"Tcl stands for "tool command language" and is pronounced "tickle." Tcl is actually two things: a language and a library. First, Tcl is a simple textual language... Second, Tcl is a library package that can be embedded in application programs." - tcl.sourceforge.net/faqs

A simple Tcl ping script:

tclsh
foreach address {
1.1.1.1
1.1.1.2
1.1.1.3
1.1.1.4
} {ping $address}

Remember to quit tcl after the script has finished or tcl may interfere with router commands:

tclq

You can get a list of ip's by editing the output from each router with:

sh ip alias