I was facing the similar problem. I solved this by sending a wakeup with "\r" character and it worked for me.
I would like you to check following code 
my $session = Net::Telnet::Cisco->new (Host=>$ipaddr,Port=>$port,Timeo
+ut=>20);
    $session->print("\r"); # required to wakeup.
    $session->print("\r")

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In reply to Re^2: Help: Net::Telnet::Cisco by rrboloor
in thread Help: Net::Telnet::Cisco by skum

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