Cisco SONET/SDH Specifications download pdf (Page 15)

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Cisco ONS 15454 SONET/SDH Unified Control Plane Configuration Guide

OL-4214-01

Chapter 1 Overview

1.2UNI Implementation

Control channels can be in-fiber/in-band (IF/IB), which means that the control channel uses the same

physical link as the data link that controls it or out-of-fiber/out-of-band (OF/OB), which means that the

control channel uses a different physical path than the data links it controls. IF/IB, also called SDCC

IPCC, is transported over the embedded SONET/SDH SDCC bytes between the client and the network

interface. OF/OB, also called routed IPCC, is transported over the 10/100T Ethernet interface.

Port Addressing

Each UNI-C NE must have a port configured for UCP implementation. This port is called an interface

or datalink. Each port in a UNI-C connection must have an identifier called a transport network address

(TNA). A TNA can be in IPv4, IPv6, or network service access point (NSAP) format.

Inter-Domain Circuits

An inter-domain circuit (IDC) is an end-to-end circuit that can contain both UCP-signaled and

non-signaled circuits. A UCP-signaled circuit is a circuit routed across the core network; it originates at

a UNI-C interface in one network and terminates at another UNI-C interface in another network.

Resource ReSerVation Protocol (RSVP) is protocol originally designed to request specific qualities of

service (QoS) from the network for particular application data streams or flows. RSVP can now provide

a signal for SONET/SDH circuits. The control channel transports these RSVP messages, which carry

source and destination addresses and required circuit attributes, such as bandwidth, framing type

(SONET or SDH), connection diversity, and service level.

A non-signaled circuit is a circuit within a subnetwork; it is not routed across the core network.

The ONS 15454 SONET and SDH Release 3.4 and 4.0 UNI implementation supports signaling over

optical interfaces. The supported circuits sizes for the UNI-C interface are STS-1, STS-3c/STM-1,

STS-6c, STS-9c, STS-12c/STM-4, STS-24c, STS-48c/STM-16, STS-192c/STM-64.

Figure 1-2 shows an example of an inter-domain circuit. You can create inter-domain circuits on the CTC

Circuits tab in network view.

Figure 1-2 Inter-Domain Circuit

90651

Node 6

Node 7

Node 5 Node 8

Node 2

Node 3

Non-signaled segment

in source subnetwork

ONS 15454

Network

Node 1 Node 4

Node 10

Node 11

ONS 15454

Network

Node 9 Node 12

Metro Core

ONE

UNI-C

UNI-N

UNI-C

UNI-N

ONE

Core Network

ONE

Signaled segment Non-signaled segment

in destination subnetwork

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