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use strict;
use warnings;
...
    print "Node with MAC address: $+{mac} has IP = $+{ip1}, $+{ip2} " 
+.
          "and Link Speed = $+{speed} and Link Cost = $+{cost}\n";
}

Node with MAC address: xx:aa:aa:aa:aa:aa has IP = a.b.c.d, x.y.z.f and
+ Link Speed = xx and Link Cost = xx
Node with MAC address: xx:aa:aa:aa:aa:aa has IP = a.b.c.d, x.y.z.f and
+ Link Speed = xx and Link Cost = xx