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Loopback Testing

PacketExpert™ 1G Software Ver 8.11.30 | Download Now!
PacketExpert™ 10G Software Ver 8.8.10 | Download Now!
PacketExpert™ 10GX Software Ver 8.8.7 | Download Now!

PacketExpert™ has all ports/2 ports Loopback capability. PacketExpert™ supports Layer-wise Loopback as well as Smart Loopback.

On PacketExpert™ 10GX platform Loopback capability is supported on all 1G ports (1G – Port#1, Port#2, Port#3, Port#4) as well, along with support on two 10G ports (10G- Port#1, Port#2).

Loopback Types

  • Smart Loopback - Analyses incoming traffic, automatically detects and swaps Source and Destination MAC, IP, and UDP addresses before sending back the packet.
  • Layer 1 – Loops back incoming packets as is
  • Ethernet – Swaps Source and Destination MAC addresses before sending back the packet
  • IP – Swaps Source and Destination MAC addresses, IP addresses before sending back the packet.
  • UDP - Swaps Source and Destination MAC addresses, Destination IP addresses, and UDP ports before sending back the packet.



Layer 2 -Ethernet swaps Source and Destination MAC addresses

Loopback helps in easy test setup, especially in end-to-end testing, when the other end is in a remote place. In such cases, one PacketExpert™ can be put in constant Loopback at the remote end, and BERT tests can be started / stopped anytime at the local end.


Loopback Configuration on 10G Ports

Loopback Configuration on 1G Ports

Port-wise Frame Statistics

Detailed statistics per port are provided. In addition to statistics like Frame Count, Frame Rate, Link Utilization (Layer1 line rate in %), Data Rate (Layer 2 data rate in Mbps), etc., statistics are provided based on various categories like Frame Type (Broadcast, Multicast, VLAN), Frame Lengths (64, 65-127, 1024-1518, Oversized, Undersized), Protocol Type (IPv4, IPv6, UDP, TCP, ICMP, IGRP etc.).




Loopback Statistics on 10G Ports


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