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$VAR1 = {
          'node' => {
...
                                 }
                    }
        };

#! /usr/bin/perl

...
        print "key = $key; loopback = $loopback\n" ;
    }
}

key = edge2; loopback = 10.6.21.10
key = edge2; loopback = 10.12.71.14
key = edge1; loopback = 172.16.254.10