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Managing OmniSwitch 6400 Series Stacks Stack Redundancy and Failover
OmniSwitch 6400 Series Hardware Users Guide July 2010 page 6-17
Redundant stacking cables provide a form of dual redundancy. As shown in the figure above, the redun-
dant cable allows traffic to flow in the event of a stacking link failure. The redundant cable also provides
failover if a switch goes down within the stack. Traffic continues to flow between the modules that remain
operational, as shown in the diagram below:
Stacking Cable Redundancy: Recovery Following a Switch Failure within the Stack
Checking Redundant Stacking Cable Status
To check whether a redundant stacking cable connection exists between the top-most and bottom-most
switches in the stack, use the show stack status command. For example:
-> show stack status
Redundant cable status : present
Tokens used : 12
Tokens available : 20
In this example, a redundant stacking cable connection is present between the top-most and bottom-most
switches in the stack.
Slot 1
Slot 2
Slot 3
Slot 4
Chassis FrontStacking Cables
Data enters slot 1 through a 10/100/1000 Ethernet port.
The data traverses slot 2 via the stacking cables and exits
slot 3 through one of its 10/100/1000 Ethernet.
1
2
The slot 2 switch goes down unexpectedly. Data can no
longer move through slot 2.
However, because there is a redundant connection (the
cable between slot 1 and slot 4), data immediately
traverses slot 4 and then exits slot 3 to its destination.
Slot 1
Slot 2
Slot 3
Slot 4
- OmniSwitch 6400 Series 1
- Hardware Users Guide 1
- Contents 3
- About This Guide 9
- Unsupported Platforms 10
- Who Should Read this Manual? 11
- What is in this Manual? 11
- What is Not in this Manual? 11
- Documentation Roadmap 12
- Related Documentation 14
- Technical Support 15
- 1 OmniSwitch 6400 Series 17
- Availability Features 19
- Hot Swapping 20
- Hardware Monitoring 20
- 2 OmniSwitch 6400 Series 21
- Chassis and Hardware 21
- Components 21
- OmniSwitch 6400-24 Rear Panel 23
- OS6400-24 Specifications 24
- OS6400-P24 Specifications 27
- OS6400-U24 Specifications 30
- OS6400-U24D Specifications 33
- OmniSwitch 6400-48 34
- OmniSwitch 6400-48 Rear Panel 35
- OS6400-48 Specifications 36
- OS6400-P48 Specifications 39
- LED Status Indicators 40
- PS-510W-AC Power Supply 42
- PS-510W-AC-E Power Supply 43
- PS-360W-AC Power Supply 44
- PS-360W-AC-E Power Supply 45
- PS-126W-AC Power Supply 46
- PS-120W-DC Power Supply 47
- 126W AC Internal Power Supply 48
- 120W DC Internal Power Supply 48
- Power Supply Shelf 49
- AC Power Cords 50
- DC Power Specifications 51
- Console Port 52
- Port Pinouts 54
- 3 Mounting OS6400 57
- Switches 57
- Reduced Air Flow 58
- Mechanical Loading 58
- Circuit Overloading 58
- Reliable Earthing 58
- Airflow Recommendations 59
- Fan Speed Control 60
- Installation Overview 61
- Tabletop Installation 62
- Next Steps 63
- Rack-Mount Installation 64
- Recommended Cabling Patterns 66
- Cabling Steps 67
- Installing Power Supplies 69
- Rack Mounting Power Supplies 71
- Redundant 510W-PoE 73
- AC Power Supply Connections 75
- DC Power Supply Connections 76
- DC Power Source 78
- OS6400 Power Supply 78
- Hot-Swapping Power Supplies 79
- 4 Booting OmniSwitch 6400 81
- Series Switches 81
- Monitoring the Chassis 83
- Checking the Fan Status 84
- 5 Managing Power over 85
- Ethernet (PoE) 85
- Power over Ethernet Defaults 89
- Disabling PoE 90
- Setting Port Priority Levels 91
- Disabling Priority Disconnect 93
- Enabling Priority Disconnect 93
- 6 Managing OmniSwitch 99
- 6400 Series Stacks 99
- In This Chapter 100
- Roles Within the Stack 101
- Using the Chassis MAC Address 104
- Using Saved Slot Information 105
- Using Switch Uptime 106
- Idle Module Role 109
- Pass-Through Mode 110
- Stack Redundancy and Failover 114
- Slot Numbering 116
- Manual Slot Number Assignment 119
- Merging Stacks 122
- Reloading Switches 123
- -> reload primary 124
- -> reload secondary 125
- -> reload ni 3 127
- -> reload all 128
- Avoiding Split Stacks 130
- -> takeover 131
- Monitoring the Stack 134
- Management Modules 135
- A Regulatory Compliance 137
- 产品说明书附件 138
- Statement 140
- Standards Compliance 141
- FCC Class A, Part 15 142
- Canada Class A Statement 142
- CISPR22 Class A warning 142
- Translated Safety Warnings 144
- Installation Warning 145
- Lithium Battery Warning 146
- Operating Voltage Warning 146
- Power Disconnection Warning 147
- Wrist Strap Warning 149
- Clase de seguridad 151
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