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Chapter 3
Configuring Unchannelized OCx/STMx
Interfaces
Overview
APS and MSP
This chapter provides information you need to configure unchannelized SONET/SDH
interfaces on E Series Broadband Services Routers.
This chapter contains the following sections:
Overview on page 73
Platform Considerations on page 77
References on page 84
Configuration Tasks on page 84
Testing Interfaces on page 96
Monitoring SONET/SDH Interfaces on page 97
SONET/SDH interfaces are supported by the modules described in this chapter. This
section describes features that are available with SONET/SDH interfaces.
E Series routers support Automatic Protection Switching (APS) and Multiplex Section
Protection (MSP) on selected I/O modules that provide SONET/SDH connections. This
feature provides a redundant connection if a primary SONET/SDH connection fails.
For a list of I/O modules that support APS/MSP, see ERX Module Guide, Appendix A,
Module Protocol Support.
NOTE: The E120 and E320 Broadband Services Routers do not support APS/MSP.
I/O modules that support APS/MSP have some ports designated for primary operation
and other ports designated for redundant operation. For APS/MSP to work correctly,
you must provide connections from a primary port and a corresponding redundant
port to the remote device. The remote device must also support APS/MSP.
73
Overview
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