SONET/SDH
Available Languages
Table Of Contents
Information Model Objects (IMOs)
Vendor-Specific Inventory and IMOs
SONET/SDH
This chapter describes the level of support that Cisco ANA provides for synchronous optical technology (SONET/SDH), as follows:
•
Information Model Objects (IMOs)
•
Please see Part 1: Cisco VNEs in this guide for information about which devices support the various technologies.
Technology Description
SONET/ SDH was originally standardized for connecting one fiber system to another at the optical level, to form a single international standard for fiber interconnects between telephone networks of different countries. Today it is a widely deployed, mature technology used in implementing high-speed, large-scale IP networks. It combines high bandwidth capacity with efficient link utilization, making it a major building block for accommodating fast-growing IP infrastructure both in the core and at the edge.
SONET/SDH can handle a variety of transmission rates and applications by defining a synchronous, flexible, optical hierarchy for carrying many signals of different capacities. This is accomplished using a byte-interleaved multiplexing scheme, which simplifies multiplexing and offers end-to-end network management. It is a layered protocol that defines four separate layers—Photonic, Section, Line, and Path—within the OSI physical layer (Layer 1).
SONET/SDH networks consist of path terminating elements (PTEs), which represent the physical layer interfaces; add/drop multiplexers (ADMs) or Digital Crossconnect Systems (DCSs); and regenerators interconnected by point-to-point SONET/SDH links called sections. These are fundamentally connection oriented, which means that a VC must be set up across the SONET/SDH network prior to any data transfer.
Cisco ANA does not support discovery of SONET/SDH physical layer topology. This topology is manually (statically) configured by the system administrator.
However, it is used in conjunction with the data link layer above it, such as ATM, for discovering its physical topology, while further verifying it by matching the traffic signature of these ports using Cisco's confidential scheme, which requires a substantial amount of traffic in order to function correctly.
Note
Information Model Objects (IMOs)
This section describes the following IMOs:
•
•
•
•
SONET/SDH Physical
The physical layer SONET/SDH Physical object is bound by its Containing Termination Points attribute to a Port Connector object. It is accessed primarily by the data link layer object, such as Asynchronous Transfer Mode and Frame Relay interfaces, as well as the PoS interface (implemented using PPP Encapsulation), bound by its Contained Connection Termination Points attribute.
Table 29-1 SONET/SDH Physical (ISonetSdh)
Specific Type
Specific type (Null, SONET/SDH Mux, OC3, OC12, OC24, OC48, OC192, STM1, STM4, STM16, STM64)
IpCore
Configuration
Loop Back Type
Loopback type (Null, Cell, Payload, Diag, Line, None, Other, Path, Metalic, Non Metalic, Serial, Parallel, Local, Internal, Network, Inward, Dual, Remote, Inbound Local, No Loop, Facility Loop, Terminal Loop, Other Loop)
IpCore
Configuration
Scrambling Mode
Scrambling mode (Null, On, Off, Payload, Frame, Payload and Frame)
IpCore
Configuration
TCAThresholdB1
The threshold for B1 threshold crossing alarms (B1-TCA). The value specifies a negative exponent to the power of 10 (10 to the power of minus value) for the threshold value, with a default value of 6 (10e-6).
IpCore
Configuration
TCAThresholdB2
The threshold for B2 threshold crossing alarms (B2-TCA). The value specifies a negative exponent to the power of 10 (10 to the power of minus value) for the threshold value, with a default value of 6 (10e-6).
IpCore
Configuration
TCAThresholdB3
The threshold for B3 threshold crossing alarms (B3-TCA). The value specifies a negative exponent to the power of 10 (10 to the power of minus value) for the threshold value, with a default value of 6 (10e-6).
IpCore
Configuration
Clocking
The SONET port TX clock source where the internal keyword sets the internal clock (line, internal). The line keyword sets the clock recovered from the line (this is the default).
IpCore
Configuration
All additional attributes are the same as Physical Layer (IPhysicalLayer)
DS1 Channelized Interface
The physical layer DS1 Channelized Interface object represents a high-order SONET/SDH DS1 circuit.
DS3 Channelized Interface
The physical layer DS3 Channelized Interface object represents a high-order SONET/SDH DS3 circuit.
SONET SDH Hop
The physical layer SONET SDH Hop object represents an interface on a high-order SONET/SDH circuit.
SONET STS 1
The physical layer SONET STS 1 object represents an instance of an STS1 circuit.
Table 29-5 SONET STS 1 (ISonetSts1)
All attributes are the same as SONET SDH Hop (ISonet_SdhHop)
SDH AU 4
The physical layer SDH AU 4 object represents an instance of an AU4 circuit.
Table 29-6 SDH AU 4 (ISdhAu4)
All attributes are the same as SONET SDH Hop (ISonet_SdhHop)
SDH AU 3
The physical layer SDH AU 3 object represents an instance of an AU3 circuit.
Table 29-7 SDH AU 3 (ISdhAu3)
All attributes are the same as SONET SDH Hop (ISonet_SdhHop)
Vendor-Specific Inventory and IMOs
There are no vendor-specific inventory or IMOs for this technology.
Service Alarms
The following alarms are supported for this technology:
FeedbackContact Cisco
- Open a Support Case
- (Requires a Cisco Service Contract)