@param mr_label - The MPLS label value
@param mr_eos - The End of stack bit
@param mr_eos_proto - If EOS then this is the DPO packect's proto post pop
@param mr_label - The MPLS label value
@param mr_eos - The End of stack bit
@param mr_eos_proto - If EOS then this is the DPO packect's proto post pop