Providing two 10 Gbps optical ports and two 10/100/1,000 Mbps electrical/optical ports, PacketExpert™ 10G is capable of generating/receiving traffic with stacked VLAN (Q-in-Q) and stacked MPLS, making it suited for wide range of networks. Wire speed BERT capability measures Bit Error Rate on Layer1, Framed Ethernet (Layer2), MPLS (Layer2.5), IP, and UDP layers. PacketExpert™ 10G also supports all RFC 2544 Tests for performance benchmarking of individual network elements.