OptiX OSN 7500 Intelligent Optical Switching System. Technical Manual - part 4
Full name
Slot available
Outlet mode
Interface type
Connector
EGR2
2-port Gigabit
slot 1-slot 8,
Led out from
1000BASE-SX/LX/ZX
LC
Ethernet ring
the front panel
slot 11-slot 18,
network board
slot 26-slot 31
ADL4
1 x STM-4 ATM
slot 1-slot 8,
Led out from
S-4.1, L-4.1
LC
service
the front panel
slot 11-slot 18,
processing board
slot 26-slot 31
ADQ1
4 x STM-1 ATM
slot 1-slot 8,
Led out from
I-1, S-1.1, L-1.1
LC
service
the front panel
processing board
slot 11-slot 18,
slot 26-slot 31
IDL4
1 x STM-4 ATM
slot 1-slot 8,
Led out from
S-4.1, L-4.1
LC
(IMA) service
the front panel
processing board
slot 11-slot 18,
slot 26-slot 31
IDQ1
4 x STM-1 ATM
slot 1-slot 8,
Led out from
I-1, S-1.1, L-1.1
LC
(IMA) service
the front panel
slot 11-slot 18,
processing board
slot 26-slot 31
MST4
4 x multi-service
slot 1-slot 8,
Led out from
—
LC
transparent
the front panel
slot 11-slot 18,
transmission line
board
slot 26-slot 31
MR2A
Dual optical
slot 1-slot 8,
Led out from
—
LC
add/drop
the front panel
multiplexing
slot 11-slot 18,
board
slot 26-slot 31
MR2C
Dual optical
slot 19-slot 22,
Led out from
—
LC
add/drop
the front panel
multiplexing
slot 35-slot 38
board
LWX
Arbitrary Bit Rate
slot 1-slot 8,
Led out from
—
LC
Wavelength
the front panel
Conversion Unit
slot 11-slot 18,
slot 26-slot 31
4-10
Board
Full name
Slots available
Interface type
Used with
ETF8
8 x 10/100M Ethernet
slot 19-slot 22, slot 35-slot 38
RJ-45
EFS0, EMR0
twisted pair interface board
EFF8
8 x 10/100M Ethernet
slot 19-slot 22, slot 35-slot 38
LC
EFS0, EMR0
twisted pair interface board
ETS8
8 x 10/100M Ethernet
slot 21 and slot 35
RJ-45
EFS0
interface switching board
4-11
Software
5.1 Overview
The software system of the OptiX OSN 7500 is of modular structure, as shown in
Figure 5-1. Except the intelligent software system which can be operated
independently, the software system include three modules: board software, NE
software and NM software, respectively run on various boards, SCC board and NM
computer for corresponding functions.
NM software
Intelligent
Board
NE software
software
software
IP protocol
stack
OSP platform
Figure 5-1 Software system structure of the OptiX OSN 7500
5-1
of the OptiX OSN 7500 is the new generation OptiX software platform (OSP). The
OSP provides a software structure based on modules as shown in Figure 5-2.
Intelligent control layer
User
Network protocol layer
interface
layer
Service control layer
System application layer
Standard protocol stack layer
Unified communication mechanism layer
VOS layer
Figure 5-2 Hierarchical structure of OSP software
5.2 Intelligent Software
The intelligent software is represented in a control plane which is layered on top of the
service plane. The control plane interacts with the service plane to realize
auto-configuration of service and provide service protection based on user levels.
Figure 5-3 shows the relationship between the intelligent control plane and service
plane.
Service route
Protection and
Signaling
algorithm
retoring
Control plane
Resource agent
(master)
Interface adaptation
Resource agent
Service plane
(slave)
Configuration
Performance
Alarm
Security
module
module
module
module
Figure 5-3 Relationship between control plane and service plane
The service plane manages service configuration of the OptiX OSN 7500 and
5-2
the service plane. Through the interface adaptation mechanism, the resource agents
of the control plane and the service plane interact with each other to get the status of
resource allocation and implement function provisioning of the NE.
5.3 NE Software
The NE software is used to manage, monitor and control the operation of the boards
of an NE. Through the NE software, the communication unit between the NM system
and boards, the NM system can control and manage NEs. According to ITU-T
Recommendation M.3010, the NE software belongs to the unit management layer in
the telecommunication management network, implementing the functions including
NE functions, some of coordination functions and operating system functions of the
network unit layer. The data communication function implements the communication
between the NE and other equipment (including coordinated equipment, NM system,
and other NEs).
Real-time multi-task operating system
The function of the real-time multi-task operating system of the OptiX OSN 7500 NE
software is to manage public resources and provide support for the executive program.
It can provide an executive environment unrelated to processor hardware by
segregating the application from the processor.
Network side (NS) module
The NS module is between the communication module and equipment management
module. It converts the data format between the user operation side on the application
layer and the NE equipment management layer, and provides security control for the
NE layer. It can be divided into three sub-modules functionally: Qx interface module,
command line interface module and security management module.
Equipment administration module (AM)
The equipment AM is the kernel of the NE software for implementing NE management.
It includes Manager and Agent. Administrator can send network management
operation commands and receive events. Agent can respond to the network
management operation commands sent by the network administrator, implement
operations to the managed object and submit events according to status change of
the managed object.
The equipment AM includes configuration management module, performance
management module, alarm management module and MSP switching management
module.
Communication module
This module fulfills the message communication function (MCF) of the functional
blocks of the transmission network equipment.
5-3
module transmits the OAM&P information and exchanges management information
between the NM system and NEs, and between NEs themselves. It consists of
network communication module, serial communication module and ECC
communication module.
Database management module
This module is an organic component of the NE software, composed of database and
management system. Database comprises several sub databases, including network
database, alarm database, performance database and equipment database. The
management system manages and accesses the data in the database.
5.4 Board Software
The board software runs on each board, managing, monitoring and controlling the
operation of the board. It receives the command issued from the NE software and
reports the board status to the NE software through performance and alarm events.
Its specific functions include: alarm management, performance management,
configuration management and communication management and so on. It can
directly control the functional circuits in corresponding boards and implement ITU-T
compliant specific functions of the NE.
The board software can be classified into the following types: line software,
cross-connect software, clock software and orderwire software.
5.5 NM System
The NM system implements a unified management over the optical transmission
network, and maintains all ION, SDH, Metro, DWDM NE equipment in the network. In
compliance with ITU-T Recommendation, it is a network management system
integrating standard management information model and object-oriented
management technology. It exchanges information with NE software through the
communication module to implement monitoring and management over the network
equipment.
The NM software runs on a workstation or PC, managing the equipment and the
transmission network. It enables the user to operate, maintain and manage the
transmission equipment. The management functions of the NM software include:
Alarm management: Collect, prompt, filter, browse, acknowledge, check, clear, and
statistics in real time; fulfill alarm insertion, alarm correlation analysis and fault
diagnosis.
Performance management: Set performance monitoring; browse, analyze and
print performance data; forecast medium-term and long-term performance; and
reset performance register.
5-4
trails, subnets and time.
Security management: NM user management, NE user management, NE login
management, NE login lockout, NE setting lockout and local craft terminal (LCT)
access control of the equipment.
Maintenance management: Provide loopback, board resetting, board temperature
threshold setting, automatic laser shutdown (ALS) and optical fiber power
detection, and collect equipment data to help the maintenance personnel in
troubleshooting.
5-5
Data Features
This chapter introduces the data features provided by the OptiX OSN 7500. It covers:
Ethernet
RPR
ATM
6.1 Ethernet Features
This section introduces the Ethernet features of the OptiX OSN 7500 in terms of
function, application and protection..
6.1.1 Function
The OptiX OSN 7500 provides the Ethernet boards EFS4, EFS0, EGS2, EGT2 and
EFT8 to meet different Ethernet service requirements. Table 6-1 lists the basic
functions of these boards..
Table 6-1 Functions of OptiX OSN 7500 Ethernet boards
Feature
EFS4
EFS0
EGS2
EGT2
EFT8
Board
Interface
4 x FE
8 x FE
2 x GE
2 x GE
8/16 x FE
Interface board used with
-
ETF8,
-
-
ETF8, EFF8
EFF8, ETS8
Service frame format
Ethnet II, IEEE 802.3
Ethnet II, IEEE 802.3
6-1
EFS4
EFS0
EGS2
EGT2
EFT8
Board
Max. uplink bandwidth
622
1.25 Gbit/s
2.5 Gbit/s
2.5 Gbit/s
1.25 Gbit/s
Mbit/s
Number of VCTRUNKs
24
24
48
2
16
Ethernet private line (EPL)
Supported
Supported
Ethernet virtual private line
Supported
Not supported
(EVPL)
Ethernet private LAN (EPLAN)
Supported
Not supported
Ethernet Virtual Private LAN
Supported
Not supported
(EVPLAN)
MPLS
Support MartiniOE, MartiniOP and
Not supported
VMAN
VLAN
IEEE 802.1q
Not supported
Rapid spanning tree protocol
Support STP and RSTP
Not supported
(RSTP)
Multicast (IGMP Snooping)
Supported
Not supported
Encapsulation format
Generic framing procedure (GFP)
High level data link control
(HDLC), link access
procedure-SDH (LAPS),
generic framing procedure
(GFP)
Mapping mode
VC-12, VC-3, and virtual
VC-3, VC-4
VC-12, VC-3,
concatenation
and virtual
concatenation
Link stat pass through (LPT)
Supported
Supported
JUMBO frame
Supported
Supported
Link capacity adjustment
Supported, compliant with ITU-T
Supported, compliant with
scheme (LCAS)
G.7042
ITU-T G.7042
Committed access rate (CAR)
Based on port or port + VLAN, with
Not supported
granule adjustment by 64 kbit/s
Flow control
Supported, compliant with IEEE
Supported, compliant with
802.3X
IEEE 802.3X.
Test frame
Supported
Supported
6-2
EFS4
EFS0
EGS2
EGT2
EFT8
Board
Ethernet performance
Supported
Supported
monitoring
6.1.2 Application
The OptiX OSN 7500 integrates the access of Ethernet services on the SDH
transmission platform, so it can transmit both the voice service and data service.
1. EPL Service
EPL implements the point-to-point transparent transmission of Ethernet service. As
shown in Figure 6-1, the Ethernet services of different NEs are transmitted to the
destination node through their respective VCTRUNKs. The Ethernet service is
provided with a perfect SDH self-healing ring (SHR) protection scheme, and its
reliable transmission is thus guaranteed.
NE 4
1
4
NE 1
SHR
NE 3
5
2
3
NE 2
n
Traffic flow
Figure 6-1 The EPL service
2. EPL Service with VLAN Capability
EPL services are isolated through VLAN tags during bandwidth sharing. As shown in
Figure 6-2, flow classification is performed for the Ethernet service according to the
port and VLAN ID to distinguish different VLANs of Company A and B. Up to eight
IEEE802.1P-compliant priorities can be set according to the flow classification result.
For security purpose, the OptiX OSN 7500 isolates services of different users by
VLAN. In the figure below, VLAN 1 of Company A shares a VCTRUNK with VLAN 1 1
of Company B, VLAN 2 of Company A shares a VCTRUNK with VLAN 12 of Company
6-3
All services of Company A are converged to NE1 and output from the FE/GE interface
of the NE1, and then are sent to the Lanswitch for further processing.
Headquarters
Headquarters of
of Company A
Company B
VLAN 3
VLAN 11
VLAN 12
VLAN 2
VLAN 1
VLAN 13
NE 1
VLAN 1
VLAN 3
NE 2
1
3
NE 4
Branch
2
VLAN 13
Branch
SHR
VLAN 11
NE 3
VLAN 2
VLAN 12
n
Traffic flow
Branch
Figure 6-2 The EPL service with VLAN tag
3. EVPL Service with MPLS Capability
The OptiX OSN 7500 adopts the Martini modes to construct the multi-protocol label
switching (MPLS) Layer 2 VPN and provide EVPL service.
The EVPL service offers point-to-point connection and implements service
convergence for users. As shown in Figure 6-3, the system will search the Port + Vlan
ID table for the external label (Tunnel) and internal label (VC), and add them to the
accessed Ethernet frames. Data transfer in the network is based on the MPLS label,
which switched at the label switch path (LSP). Then, the data will be transmitted to the
NE4 equipment, which strips the MPLS label and transfers the data to the
corresponding port. The OptiX OSN 7500 integrates the function of P equipment and
PE equipment.
6-4