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8/12/2019 OTA058101 OptiX ASON V100R002 New Features Introduction ISSUE 1.00
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Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
ISSUE 1.00
OTA058101 OptiX
ASON V100R002
New Features
Introduction
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Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page1
Foreword
ASON technology applied to next generation transmission
networks has now improved. Huawei’s ASON solution
include OptiX ASON V100R001 (R1)and OptiX ASON
V100R002 (R2). R2 is the latest version which includes allthe functions of R1 and also supports new features. This
course is a detailed introduction on the new features of R2.
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References
OTA058001 ASON Introduction
OptiX ASON User Guide (V100R002)
OptiX iManager T2000 for SDH
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Objectives
Upon completion of this course, you will be able to:
Describe the ASON R2 new features;
Outline the modified functions of ASON R1;
Explain Intelligent Synchronization of MESH Network.
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Contents
1. Overview
2. ASON R2 New Features
3. Modified Functions of ASON R2
4. Synchronization of MESH Network
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Overview
Link Management
Link Verification
Diamond Serviceprovision
Gold Service provision
Iron Service provision
Modified FunctionsNew Features
New Rerouting Strategy
HPOH Alarm to Trigger Rerouting
Preset Restoring Trail Path Pre-Calculation
Unidirectional Tunnel Service
Revertive Service
Trails Association & SLA group
In-Service Migration
Protocol Authentication
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Contents
1. Overview
2. ASON R2 New Features
3. Modified Functions of ASON R2
4. Synchronization of MESH Network
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2. ASON R2 New Features2.1 New Rerouting Strategy
2.2 HPOH Alarm to Trigger Rerouting
2.3 Preset Restoring Trail
2.4 Path Pre-Calculation
2.5 Unidirectional Tunnel Service
2.6 Revertive Service
2.7 Trails Association& SLA group
2.8 In-Service Migration
2.9 Protocol Authentication
Contents
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Crankback mechanism:
when rerouting fail due to link or node failure, ASON will try to
use the Crankback operation, and exclude the failed link or
node that lead to the operation failure, in this way, enhancing
the creation , optimization and rerouting success ratio of the
service.
New rerouting strategy:
Do not use existing trails whenever possible;
Use existing trails whenever possible (Save network bandwidth
resource );
No rerouting constraint (Based on path Metric).
Rerouting Function
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Do not use existing trails whenever possible
New rerouting Strategy
T2000 NMS
ASON NE
Client
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Use existing trails whenever possible
New rerouting Strategy (Cont.)
T2000 NMS
ASON NE
Client
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Higher Order Path Level Rerouting:
Locating the fault indicated by AU-AIS;
Rerouting is triggered by AU-AIS.
ASON R2 supports TE link degrading when NE fails or
control link is down. ASON will avoid these degraded TE
links when there is trail rerouting.
Rerouting Function (Cont.)
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T2000 NMS
ASON NE
Client
In R2, rerouting can be triggered by AU-AIS.
HPOH Alarm to Trigger Rerouting
16 x AU-AIS
Fiber 16 x VC4
32xVC4+2xVC4-16c16xVC4+2xVC4-16c
Fiber
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Preset Restoring Trail
ASON supports presetting restoring trail for a silver ASON trail.
When the silver ASON trail reroutes, the service can be restored
to the preset restoring trail.
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Path Pre-Calculation
When creating and optimizing service, T2000 issues a command to
the NE to perform auto pre-calculation. Any changes in route
restrictions, source/sink, or protection type trigger the auto pre-
calculation.
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Unidirectional Tunnel Service
Unidirectional Tunnel Service: the cross-connect of tunnel service in onenode is static cross-connect, another node is intelligent cross-connect. It
supports end to end tunnel service between ASON NE and non-intelligent
NE.
ASON R1 tunnel serviceH-XC
L-XC
ASON R2 tunnel service
ASON NE
Non-ASON
Tunnel service
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Revertive Service
R2 provides Diamond, Gold, Silver level revertive
service;
Auto-revertive:
When the service reroute to the new route, the original route
will be reserved. The ASON service will revert to original route
and delete the original route after WTR time when the failure is
restored;
After the service reroute to the new route, if the this route fails
in WTR time then the service will revert to the original route
immediately.
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Revertive Service (Cont.)
Revertive Diamond Service
T2000 NMS
ASON NE Client
Working
Protection
WTR 5 ~12Min
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Trails Association
Trails association between two silver/copper trails or two tunnel
trails;
Non-uniform head-end trails association.
T2000 NMS
ASON NE
Client
Trails
association
Anti-Node failure
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SLA Group
R2 supports ASON service group for LCAS. Trails of LCAS
member connections created must be as separate as
possible. These connections can be restored by rerouting;
Supports adding and deleting SLA group and in-service SLAmember management;
R2 supports SLA group attributes modification and group
members routes modification;
Querying the information of SLA group and SLA member.
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In-Service Migration
R2 provides in-service migration for Diamond, Silver and Copper
trails;
Diamond Copper/Silver or Silver Copper;
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Protocol Authentication
Authentication for the OSPF & RSVP
protocols can improve the security of the
network in an ASON domain;
Authentication mode: No Authentication,
MD5 Encryption Authentication, Plain
Text Password Authentication.
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New Function for Networking &
Maintenance
Adding or deleting MSP VR dynamically:
Modifying MSP bandwidth dynamically;
Configuring two MSP VR within one fiber (OptiX OSN
1500/2500/3500/7500).
Forced switch for MSP VR;
R2 provides subnet compatibility for ASON NE and non-intelligent
NE;
1+1 linear MSP access at the edge of ASON network.
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Contents
1. Overview
2. ASON R2 New Features
3. Modified Functions of ASON R2
4. Synchronization of MESH Network
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3. Modified Functions of ASON R2
3.1 Link Management
3.2 Link Verification
3.3 Diamond Service provision
3.4 Gold Service provision
3.5 Iron Service provision
Contents
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Link Management R1
In R1, when MSP is configured, the resource of this optical port is divided
into three data links (working, protection and no protection);
One data link correspond to one TE link;
Each optical port can provide one MSP.
Protection Path
No Protection Path
No Protection Path
Working PathVC4:1-16
VC4:17-32
VC4:33-48
VC4:49-64
TE Link2
TE Link1
TE Link3
TE Link2
Resource distribution after MSP is configured
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Link Management R2
In R2, there is one TE link in one fiber;
Different timeslots in TE links have different protection attributes.
Timeslots having the same attributes is called segment;
Support multiple MSP in one optical port.
VC4:1-16
VC4:17-32
VC4:33-48
VC4:49-64
TE Link1
TE Link1
TE Link1
TE Link1
Resource distribution after MSP is configured
Protection Timeslot
No Protection
Timeslot
Working Timeslot
No Protection
Timeslot
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Link Verification
R1 The connectivity of the data link can only be verified by J0 byte.
R2The connectivity of the data link can be verified by J0 byte (by default)
or DCC bytes.
R2 supports verification modes auto-negotiation, J0 mode is used by default. If NODE A
is set to DCC mode, but NODE B still works in J0 mode, then the link between A and
B can not use DCC mode. After 30s the link will automatically change to J0 mode.
NODE A NODE B
DCC Mode
J0 ModeJ0 Mode
DCC Mode
DCCJ0
30s
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Link Verification (Cont.)
If there is a non-intelligent NE between two ASON NEs, the J0 bytes willbe terminated by the intermediate NE. So it is impossible to use the J0
mode to verify the links. Then, DCC mode can be used to verify the link.
NODE A NODE B NODE C
DCC Bytes Pass-through
DCC ModeDCC Mode
DCC Bytes DCC Bytes
Non-intelligentNE
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Diamond Service provision
There are three types of diamond services in R2:
Permanent 1+1 diamond service: Rerouting is triggered once
an LSP fails;
Rerouting 1+1 diamond service: Rerouting is triggered onlywhen both LSPs fail;
Non-rerouting diamond service: Rerouting is never triggered.
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Diamond Service provision (Cont.)
Rerouting 1+1 diamond serviceT2000 NMS
ASON NE Client
Working
Protection
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Diamond Service provision (Cont.)
Non-rerouting diamond serviceT2000 NMS
ASON NE Client
Working
Protection
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Gold Service provision
R1 gold service: Only the MSP working path can be used to create gold service;
The MSP working path will be used in case of rerouting;
The non-protection bandwidth resources can be used when the MSP working
bandwidth resources are insufficient.
R2 gold service:
The MSP working timeslot is used to create gold services;
The non-protection timeslot can be used to create the gold service when the
MSP working path is insufficient.
The MSP protection timeslot can be used for rerouting if no available resource.
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Iron Service provision
ASON R1 iron service:
Iron trail can be created with protection path of MSP;
Iron trail can be preempted by gold trail when the MSP switched.
ASON R2 iron service:
The MSP timeslot is used to create iron services and to optimize iron trails.
The non-protection timeslot can be used only when the MSP timeslot is
insufficient.
The iron trail can be preempted by the trail of a higher level such as silver level.
The iron services can be recovered after the service of a higher class reverts
to the original trail.
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Link Management
Link Verification
Diamond Service
provision
Gold Service provision
Iron Service provision
Modified FunctionsNew Features
New Rerouting Strategy
HPOH Alarm to Trigger Rerouting
Preset Restoring Trail
Path Pre-Calculation
Unidirectional Tunnel Service
Revertive Service
Service Association& SLA group
In-Service Migration
Protocol Authentication
Summary
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Contents
1. Overview
2. ASON R2 New Features
3. Modified Functions of ASON R2
4. Synchronization of MESH Network
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4. Synchronization of MESH Network
4.1 Manual Synchronization of MESH Network
4.2 Intelligent Synchronization of MESH Network
Contents
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Synchronization of Traditional SDH
Network
Synchronization of Traditional SDH Network:
Planning synchronization relationship manually;
Specify the tracking relationship via NMS.
Manually specify relationshipT2000 NMS
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PRC
Manual configuration
Manual Synchronization:
Complex configuration, Low
efficiency;
Likely to make mistakes andcause clock loops in MESH
Network;
Difficult to achieve clock
protection.
Manual Synchronization of MESH
Network
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Intelligent Synchronization of MESH
Network
Intelligent Synchronization is a concept of networking;
When the information of synchronization changed, this
information will flood in the network to adjust the clock
tracing relationship.
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Intelligent Synchronization
Intelligent Synchronization:
Automatically avoid clock loops;
Automatically configure
synchronization tracking;
Automatically update
synchronization information;
Fast automatic restoration;
Higher reliability.
PRC
Intelligent Synchronization of MESH
Network (Cont.)
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Summary
Overview
ASON R2 New Features
Modified Functions of ASON R2
Synchronization of MESH Network
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