Chapter 9 Ethernet Operation; Ethernet Over Sonet Application - Cisco ONS 15327 User Documentation

9
C H A P T E R
Ethernet Operation
This chapter explains how to use the Ethernet features of the Cisco ONS 15327, including transporting
ONS 15327 Ethernet data over SONET, creating and provisioning VLANs, protecting Ethernet traffic
with Spanning Tree Protocol (STP), provisioning Multicard and Single-card EtherSwitch, provisioning
several types of Ethernet circuits, viewing Ethernet performance data stored in CTC, creating Ethernet
Remote Monitoring (RMON) alarm thresholds, and troubleshooting Ethernet connections.

9.1 Ethernet over SONET Application

The ONS 15327 integrates Ethernet access into the same SONET platform that transports voice traffic.
Ethernet over SONET lets service providers augment time division multiplexing (TDM) services with
Ethernet, and allows users to deliver data traffic over existing facilities. The ONS 15327 supports layer
2 switching and the ability to classify Ethernet traffic as defined in the IEEE 802.1Q standard. You can
switch tagged traffic onto separate SONET STS channels to allocate bandwidth by traffic class.The ONS
15327 can also concentrate Ethernet ports into one or more STS-N circuits to use bandwidth more
efficiently.
The ONS 15327 Ethernet solution uses existing SONET infrastructure to transport aggregate (combined)
traffic from multiple, remote sources. Figure 9-1 illustrates aggregation and transport.
Cisco ONS 15327 User Documentation, R3.3
9-1
June 2002