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Configuring Channelized SONET/SDH on the Cisco ASR 9000 Series Router

Figure 25

VTG paths are only supported on the Cisco 1-Port Channelized OC-3/STM-1 SPA and Cisco 2-Port

Note

Channelized OC-12c/DS0 SPA on the Cisco ASR 9000 Series Router.

Figure 25

Channelized SDH Overview

Synchronous Digital Hierarchy (SDH) is the international equivalent of SONET.

Channelized SDH is supported on the following SPAs:

•

A Synchronous Transport Module (STM) signal is the Synchronous Digital Hierarchy (SDH) equivalent

of the SONET STS, but the numbers are different for each bandwidth. In this guide, the STM term refers

to both path widths and optical line rates. The paths within an STM signals are called administrative

units (AUs).

A summary of the basic terminology differences between SONET and SDH is as follows:

•

OL-26061-03

shows the VTG paths that can be configured.

SONET VTG Channelized Paths

SONET

Controller

STS 1

STS 2

STS 3

Cisco 1-Port Channelized OC-48/STM-16 SPA

Cisco 1-Port Channelized OC-3/STM-1 SPA

Cisco 2-Port Channelized OC-12/DS0 SPA

SONET STS is equivalent to SDH administrative unit (AU)

SONET VT is equivalent to SDH tributary unit (TU)

SDH basic building blocks are STM-1 (equivalent to STS-3) and STM-0 (equivalent to STS-1)

Cisco ASR 9000 Aggregation Services Router Interfaces and Hardware Component Configuration Guide

Information About Configuring Channelized SONET/SDH

VTG 1

VTG 2

Each STS

VTG 3

can be channelized

into 7 VTGs.

VTG 4

VTG 5

VTG 6

VTG 7

. . . same configuration possibilities as STS 1

Each VTG

can be channelized

into 4 T1s.

HC-323