Dell N2048 Installationshandbuch - Seite 14

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Stacking Multiple Switches on Dell Networking OS 9.11(0.0)

The system supports PE stacking, which allows multiple units to act as a single port extender. You can stack up to eight units using the

stack ports on the PSU-side.

The stack ports support the serial attached SCSI (SAS) protocol and operate as mini-SAS ports. The system supports stacking only with

port extenders of the same series. The stack operates and is managed as a single entity.

NOTE:

If you are installing a stack, assemble and cable the stack before powering it up. When you power up a stack for the first

time, the units receive the provisioned configuration from the parent C9010. A Stack Master unit is elected based on the highest

MAC address or highest provisioned priority. The master unit may occupy any location in the stack. The Stack Master LED on

the I/O-side lights on the master unit.

NOTE:

Although individual stack members do not require a separate uplink to a parent C9010, Dell Networking recommends

connecting more than one stack unit to the C9010 for redundancy. A stack unit uses the stacking connection to the master PE

for its C9010 uplink. For more information, see the

Creating a Switch Stack

Create a stack by connecting adjacent units using the mini-SAS stacking ports on the PSU-side of the switch. Figure 8 shows the

switches connected in a ring topology. A ring topology is the recommended topology for a stack..

Connect one of the mini-SAS cables into either of the stacking ports of the top switch and the switch directly below it.

If necessary, use a separately purchased, longer (1–meter or 3–meter) mini-SAS cable to connect the switches.

Repeat this process until you connect all the devices.

Use the remaining stacking cable to connect the two remaining stacking ports together to create the ring topology.

Figure 8. Connecting a Stack of Switches

Connecting to a C9010 Switch section.

N20xx Series Installation