my $cust= {custom=>"FEFE03831401001101000003e00001614e1a001e50d9018101cc01030200018404c0a8010af00f00000000030102550480230000004708ff00000000000000000000"}; my $s1 = {len => "15185",bw => "5", burst_count => "10", burst_len => "5",custom_header=>$cust}; my @tmap; push (@tmap,{name=>"Stream_1",src=>["$port1"],dest => ["$port2"],stream => $s1,etherprotocol=>"Ethernet8023Raw", remove_ip_header=>1},); $rt->setup_unicast_flows(map=>\@tmap);