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Cisco 6400 Software Setup Guide
OL-1183-04
Chapter5 Redundancy and SONET APS Configuration
Primary and Secondary Role Switching
The aps signal-degrade BER threshold command controls the BER value at which a signal degrade is
announced, indicating an unstable or error-prone connection. This BER threshold can be in the range of
10
-5
to 10
-9
, and there is no default threshold.
The aps signal-fail BER threshold command controls the BER value at which a signal failure is
announced, indicating a broken connection. This BER threshold can be in the range of 10
-3
to 10
-5
, with
a default threshold of 10
-3
.
To configure the thresholds, complete the following steps beginning in global configuration mode:
The value argument represents the exponent of the BER threshold. For instance, a value of 5 would set
the threshold to 10
-5
.
Example
The following example shows how to set the APS signal degradation and signal failure thresholds for
ATM interface 1/0/0:
Switch(config)# interface atm 1/0/0
Switch(config-if)# aps signal-degrade BER threshold 7
Switch(config-if)# aps signal-fail BER threshold 5
Verifying SONET APS Signal Thresholds
To display the current BER threshold settings for an interface, use the show interface atm command:
Switch# show interface atm 1/0/0
interface ATM1/0/0
description la1
no ip address
no ip redirects
no ip proxy-arp
no atm auto-configuration
no atm ilmi-keepalive
atm uni version 4.0
aps mode linear 1+1 nonreverting unidirectional
aps signal-fail BER threshold 3
aps signal-degrade BER threshold 9
Primary and Secondary Role Switching
The Cisco 6400 allows you to manually force the primary and secondary devices in a redundant pair to
switch roles. This capability can be important for upgrade or debug activities.
Command Purpose
Step1
Switch(config)# interface atm slot/subslot/port
Selects the NLC interface.
Step2
Switch(config-if)# aps signal-degrade BER threshold value
Sets the BER threshold value for signal
degradation for the interface.
Step3
Switch(config-if)# aps signal-fail BER threshold value
Sets the BER threshold value for signal failure
for the interface.
- Text Part Number: OL-1183-04 1
- Contents 10
- OL-1183-04 10
- Document Objectives 11
- Related Documentation 11
- Audience 12
- Organization 12
- Conventions 13
- Obtaining Documentation 14
- Documentation CD-ROM 15
- Ordering Documentation 15
- Documentation Feedback 15
- Cisco.com 16
- Technical Assistance Center 16
- Product Overview 19
- Cisco 6400 System 20
- Node Switch Processor 21
- Node Route Processor 21
- Node Line Card 23
- Basic NSP Configuration 25
- Verifying DHCP 27
- ATM Address 28
- Verifying the ATM Address 30
- Internal Cross-Connections 34
- Example—Internal PVC 35
- Example—Internal PVP 36
- Network Clocking 38
- Network Routing 42
- NRP-2 and NRP-2SV Support 43
- System Logging 45
- Console and Telnet Access 45
- SNMPv3 Proxy Forwarder 46
- Storing the NSP Configuration 47
- Example—Disk0: versus Slot0: 49
- Basic NRP Configuration 51
- Initial NRP-1 Configuration 52
- Configuring the NRP-1 53
- Setting the I/O Memory Size 56
- Restrictions 58
- Example—Main ATM Interface 61
- Example—ATM Subinterface 61
- Changing the MTU on the NRP-2 62
- PAM mailbox serial interface: 68
- Permanent Virtual Circuits 70
- Configuring VC Classes 74
- Configuring PVC Discovery 76
- Verifying PVC Discovery 78
- Verifying PVC Traffic Shaping 79
- NLC Interface Identification 81
- Autoconfiguration 82
- ATM Interface Types 83
- Configuring UNIs 84
- Network-to-Network Interfaces 85
- Verifying NNI Configuration 86
- Configuring IISP Interfaces 87
- NLC Interface Clocking 88
- DS3 NLC Interface Options 90
- Memory Requirements 94
- NSP Redundancy 95
- Synchronizing Redundant NSPs 96
- PCMCIA Disk Mirroring 97
- Verifying Blind Copying 101
- Example—Disk Synchronization 102
- Examples 103
- NRP Redundancy 107
- Verifying NRP Redundancy 108
- NLC Redundancy 109
- Verifying NLC Redundancy 110
- Verifying SONET APS 112
- • Remote Monitoring, page 6-4 117
- • Alarms, page 6-4 117
- Remote Monitoring 120
- Verifying Temperature Alarms 121
- Clearing Alarms 122
- Web Console 123
- Web Console Installation 124
- Using the Web Console 126
- AppendixA Web Console 127
- FigureA-1 Update Page 128
- Accessing the Web Console 129
- Navigating in Web Console 131
- System Reload Options 134
- Configuring Redundancy 135
- IP Address Management 136
- Setting Static Routes 137
- SNMP Management 138
- Entering System Options 139
- Entering Community Strings 140
- Adding Trap Managers 140
- NRP Status 141
- Subscriber Management 141
- Step 2 Click Remove 143
- System Status 144
- FigureA-13 System Status 145
- Loading New Web Console Pages 146
- Recommendations 147
- Reload the Secondary NRP-1 156
- Reloading the Secondary NRP-1 159
- 2. Reload the Secondary NSP 160
- Prerequisites 161
- Reload the Secondary NSP 161
- Reloading the Secondary NSP 164
- Verifying VCI Values 169
- Shrinking ITT Blocks 172
- Displaying ITT Allocation 172
- GLOSSARY 175
- Glossary 176
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