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Using Switch Uptime
A user can override both the MAC address and saved slot methods for determining a stack’s primary
management module. This is done by controlling the uptime of switches in the stack. If all elements of a
stack are powered off, the user can force a particular switch to become primary by powering on that
switch and waiting a minimum of 15 seconds before powering on any other switches. This can be useful if
the user wants a switch placed in a specific location, e.g., the top-most switch in a stack, to become the
primary.
As with the lowest MAC address method, the primary management module is dynamically assigned slot
number 1 when the stack is booted.
For more information on using saved slot information to determine the primary switch in a stack, refer to
the diagram below:
Primary Management Module Selection Using Switch Uptime
Powered On
Powered On
Powered On
Off
Four OmniSwitch 6450 switches are stacked and connected
via stacking cables. All switches are currently powered off.
The user powers on a single switch in the stack. In this case,
the bottom-most switch is powered on.
The user now powers on the remaining switches in the stack
in short succession.
In this example, when the remaining switches come online,
each has a lower saved slot value than the switch powered on
at step 1. However, the switch powered on at step 1—with its
slot value of 8—retains its primary management role. The
joining switches are essentially ineligible for primary status
because they are considered “late arrivals.”
For the primary
switch to forfeit its role to the switch with the lowest assigned slot
number (in this case, slot number 1), the stack must be rebooted
by the user either by issuing the reload all command or by pow-
ering off and powering on all switches in close succession.
1
2
3
Off
Off
Powered On
Off
Off
Off
Primary
(Saved Slot 8)
Primary
(Saved Slot 8)
Saved Slot 3
Saved Slot 1
Saved Slot 2
Primary
(Saved Slot 8)
The user allows a minimum of 15 seconds to pass.
Because no other switches have joined the stack, the
switch that was powered on considers itself a stand-
alone. The switch assumes a primary role by default—
even if there is a high saved slot number in its
boot.slot.cfg file (e.g., 8).
4
- OmniSwitch 6450 Hardware 1
- Users Guide 1
- Contents 3
- About This Guide 9
- Who Should Read this Manual? 10
- What is in this Manual? 10
- What is Not in this Manual? 10
- Documentation Roadmap 11
- Related Documentation 13
- Technical Support 14
- Documentation Feedback 14
- 1 OmniSwitch 6450 Switches 15
- Chassis Configurations 16
- Security Features 17
- Availability Features 17
- Software Rollback 18
- Hot Swapping 18
- Hardware Monitoring 18
- 2 OmniSwitch 6450 19
- Chassis and Hardware 19
- Components 19
- OmniSwitch 6450-10 20
- OmniSwitch 6450-10 Rear Panel 21
- OmniSwitch 6450-P10 23
- OmniSwitch 6450-24 26
- OmniSwitch 6450-48 32
- OmniSwitch 6450-48 Rear Panel 33
- OmniSwitch 6450-P48 35
- OmniSwitch 6450-U24 38
- LED Status 41
- Expansion Modules 42
- OS6450-XNI-U2 43
- Internal Backup Power 44
- Supplies 44
- Installing Power Supplies 46
- Completed Installation 47
- Removing Power Supplies 48
- AC Power Cords 50
- Console Port 51
- Port Pinouts 52
- Overtemp Condition 53
- Dying Gasp 54
- Link OAM PDU 55
- 3 Mounting 57
- OmniSwitch 6450 Switches 57
- Airflow Recommendations 58
- Reduced Air Flow 59
- Mechanical Loading 60
- Circuit Overloading 60
- Reliable Earthing 60
- Table-Mounting Installation 60
- Slide chassis together 64
- Bracket Plate and Screws 64
- Rack-mounting Two Chassis 65
- Rack Mounting Steps 67
- Rack Mounting Power Supplies 69
- Chassis Connector 70
- Power Supply Connector 70
- AC Power Supply Connections 71
- 4 Booting 73
- Monitoring the Chassis 76
- • Ethernet Port LEDs 77
- • System Status LEDs 77
- • Combo Port Status LEDs 77
- 5 Managing Power over 79
- Ethernet (PoE) 79
- Power over Ethernet Defaults 82
- PoE Class Detection 83
- -> lanpower 1/1 power 3000 84
- -> lanpower 1 maxpower 40 84
- Setting Port Priority Levels 85
- Disabling Priority Disconnect 86
- Enabling Priority Disconnect 86
- 6 Managing 89
- OmniSwitch 6450 Stacks 89
- Swapping Expansion Modules 91
- OmniSwitch 6450-10 Mode 91
- Roles Within the Stack 92
- Using the Chassis MAC Address 95
- Using Saved Slot Information 96
- Using Switch Uptime 97
- • Saved slot number 98
- Idle Module Role 100
- Pass-Through Mode 101
- Stack Cabling 105
- Tokens available : 31 107
- Tokens used : 1 107
- Slot 1 - Primary 109
- Slot 2 - Secondary 109
- Slot 3 - Idle 109
- Slot 4 - Idle 109
- -> reload ni 3 119
- -> reload all 120
- Avoiding Split Stacks 122
- Monitoring the Stack 126
- Management Modules 127
- A Regulatory Compliance 129
- (Circuit Modules) 130
- Statement 132
- Standards Compliance 133
- FCC Class A, Part 15 134
- Canada Class A Statement 134
- CISPR22 Class A Warning 134
- Translated Safety Warnings 136
- Power Disconnection Warning 137
- Wrist Strap Warning 140
- Clase de seguridad 142
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