Chapter 5: Building a SummitStack Configuration
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Figure 140: Summit Switches Connected in a SummitStack Configuration
The stack operates as a single switch with a single IP address and a single point of authentication. One
switch, called the stack master, controls the stack. The master runs ExtremeXOS software and maintains
all the software tables for all the switches in the stack. A stack of switches can have only one master
switch. All switches in the stack, including the master switch, are called nodes.
Slot Numbers
A stack can be thought of as a virtual chassis. Each node operates as if it were occupying a slot in a
chassis and is controlled by the master. The high-speed stacking links function like the backplane links
of a chassis.
Each switch (or node) in the stack is assigned a “slot number” during the initial software configuration
of the stack. Starting at the switch with the console connection, numbers are assigned in numerical
order following the physical path of the connected stacking cables. For example, if you follow the
cabling recommendations presented in
“Connecting the Switches to Form the Stack Ring” on page 204
and configure a vertical stack from the console on the switch at the top of the physical stack, the
switches will be assigned slot numbers 1 through 8 from the top down, starting with slot 1.
Figure 141: Assigned Slot Numbers in a Stack
Each Summit switch has a seven-segment LED on its front panel, called the stack number indicator.
When a stack is operating, the indicator displays the slot number for the switch. This LED does not
light on switches that are not operating in stacking mode. A quick way to verify that the cable
connections match the software configuration is to check the stack number indicator on each switch. If
the slot numbers do not line up in the order you arranged the switches, this may indicate that the
stacking cable setup differs from what you intended when you configured the software. In this case,
reconnect the cables in the correct order and perform the software configuration again.
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Summary of Contents for Summit X150 Series
Page 14: ...Preface Summit Family Switches Hardware Installation Guide 14...
Page 15: ...PA R T About the Summit Family Switches...
Page 16: ......
Page 156: ...Chapter 2 Summit Power Supplies Summit Family Switches Hardware Installation Guide 156...
Page 173: ...PA R T Installing the Hardware...
Page 174: ......
Page 190: ...Chapter 4 Site Preparation Summit Family Switches Hardware Installation Guide 190...
Page 338: ...Chapter 8 Installing Optional Ports Summit Family Switches Hardware Installation Guide 338...
Page 339: ...PA R T Maintenance Procedures...
Page 340: ......
Page 399: ...PA R T Appendices...
Page 400: ......
Page 503: ...Japan VCCI Class A Summit Family Switches Hardware Installation Guide 503...
Page 504: ...Appendix B Technical Specifications Summit Family Switches Hardware Installation Guide 504...
Page 512: ...Index Summit Family Switches Hardware Installation Guide 512...