From CPAN: 

use Net::Packet::Frame;
   my $frame = Net::Packet::Frame->new(l3 => $ip, l4 => $tcp);
   $frame->send;

[download]

or 

use NetPacket::Ethernet;
  $eth_pkt = NetPacket::Ethernet->encode(params...);

[download]

CPAN documentation still reports this as unimplemented but functional versions are available.

In reply to Re: DSCP/TOS byte marking? by starbolin
in thread DSCP/TOS byte marking? by Marcelo

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