Stacking Dell PowerConnect 7000 Series Switches
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When adding a new member to a stack, make sure that only t he stack cables and no host-facing
network cables are connected before powering up the new u nit. Make sure the end-user links are not
connected to any ports on the unit being added and the new memb er is powered off. This is important
because if STP is enabled and any links are UP, then Spanni ng Tree Pro to col (STP) re-converg ence will
take place as soon as the link is detected.
After the stack cables on the new member are connected to the sta ck, connect the switch power. Do
not connect another switch to the stack until the exist ing members are powered up. Also, do not
connect two functional, powered-up stacks together. If two functional, powered-up stacks are
connected together or connect a powered-up new member to t he stack, then master re-election takes
place, which causes the stack that no longer has a master to reboot. See “Merging Two Operational
Stacks” for more details.
An “unassigned unit” is a switch that is preconfigured to be a member of a stack, but has not been
physically connected to the stack. If there are any unassigned units already confi gured on the stack,
remove them prior to adding a new unit to stack. This is important because when there is any
preconfigured unit and the master holds some configuration for that unit, as soon as the new unit is
detected, the configuration is applied, which might t rigger the re-convergence or startup of many
other protocols. However, it is possible to intentionally p re-configure a unit. The
preconfigured/unassigned units can be viewed by using the show switch CLI command shown below.
The following example shows how to view the units i n the stack and remove an unassigned unit:
console#show switch
Management Standby Preconfig Plugged-in Switch Code
SW Status Status Model ID Model ID Status Version
--- ---------- --------- ------------- ------------- ------------- ----------
1 Mgmt Sw PCT7048P PCT7028P OK 4.0.0.6
2 Unassigned PCT7028P Not Present 0.0.0.0
console#configure
console(config)#stack
console(config-stack)#no member 2
console(config-stack)#exit
console(config)#exit