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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 10 Configuring Ethernet OAM
Understanding Ethernet Loopback
Configuring Y.1564 to Generate Ethernet Traffic
Y.1564 is an Ethernet service activation or performance test methodology for turning up, installing, and
troubleshooting Ethernet-based services. This test methodology allows for complete validation of
Ethernet service-level agreements (SLAs) in a single test. Using traffic generator performance profile,
you can create the traffic based on your requirements. The network performance like throughput, loss,
and availability are analyzed using Layer 2 traffic with various bandwidth profiles. Availability is
inversely proportional to frame loss ratio.
Figure 10-2 shows the Traffic Generator topology over bridge domain describing the traffic flow in the
external and internal modes. The traffic is generated at the wire-side of network to network interface
(NNI) and is transmitted to the responder through the same interface for the external mode. The traffic
is generated at the user to network interface (UNI) and transmitted to the responder through NNI
respectively for the internal mode. External mode is used to measure the throughput and loss at the NNI
port where as internal mode is used to measure the throughput and loss at the UNI port. During traffic
generation, traffic at other ports is not impacted by the generated traffic and can continue to switch
network traffic.
Figure 10-2 Traffic Generator Topology over Bridge Domain
Effective with Cisco IOS release 15.4.(01)S, traffic can be generated over cross connect interface.
Figure 10-3 shows the Traffic Generator topology over cross connect describing the traffic flow in the
external and internal modes.