Configuring Channelized SONET/SDH on the Cisco ASR 9000 Series Router
Information About Configuring Channelized SONET/SDH
HC-318
Cisco ASR 9000 Aggregation Services Router Interfaces and Hardware Component Configuration Guide
OL-26061-03
Before configuring Channelized SONET/SDH, be sure that the following tasks and conditions are met:
• You have at least one of the following SPAs installed in your chassis:
–
Cisco 1-Port Channelized OC-3/STM-1 SPA
–
Cisco 2-Port Channelized OC-12c/DS0 SPA
–
Cisco 1-Port Channelized OC-48/STM-16 SPA
• You should know how to apply and specify the SONET controller name and interface-path-id with
the generalized notation rack/slot/module/port. The SONET controller name and interface-path-id
are required with the controller sonet command.
Information About Configuring Channelized SONET/SDH
To configure Channelized SONET/SDH, you must understand the following concepts:
• Channelized SONET Overview, page 318
• Channelized SDH Overview, page 323
• Default Configuration Values for Channelized SONET/SDH, page 326
• How to Configure Channelized SONET/SDH, page 327
Channelized SONET Overview
Synchronous Optical Network (SONET) is an American National Standards Institute (ANSI)
specification format used in transporting digital telecommunications services over optical fiber.
Synchronous Digital Hierarchy (SDH) is the international equivalent of SONET.
Channelized SONET provides the ability to transport SONET frames across multiplexed T3/E3 and
virtual tributary group (VTG) channels.
Channelized SONET is supported on the following SPAs:
• Cisco 1-Port Channelized OC-48/STM-16 SPA
• Cisco 1-Port Channelized OC-3/STM-1 SPA
• Cisco 2-Port Channelized OC-12c/DS0 SPA
Channelized SDH is supported on the following SPAs:
• Cisco 1-Port Channelized OC-48/STM-16 SPA
• Cisco 1-Port Channelized OC-3/STM-1 SPA
• Cisco 2-Port Channelized OC-12c/DS0 SPA
SONET uses Synchronous Transport Signal (STS) framing. An STS is the electrical equivalent to an
optical carrier 1 (OC-1).
SDH uses Synchronous Transport Mode (STM) framing. An STM-1 is the electrical equivalent to 3
optical carrier 1s (OC-1s).
A channelized SONET interface is a composite of STS streams, which are maintained as independent
frames with unique payload pointers. The frames are multiplexed before transmission.
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