Administrator Guide

Setting the priority will determine which switch will become the management (Master) switch. The
switch with the highest priority number is elected Master. The default priority is 0.
NOTE: It is best practice to assign priority values to all switches before stacking them in order to
acquire and retain complete control over each units role in the stack.
2 Configure the stack-group for each stack-unit.
CONFIGURATION mode
stack-unit unit-no stack-group stack-group-id
Dell(conf)# stack-unit 0 stack-group 0
Dell (conf)#02:26:05: %STKUNIT0-M:CP %IFMGR-6-STACK_PORTS_ADDED:
Ports Fo 0/33 have been configured as stacking ports.
Please save and reload for config to take effect
Stack-groups are easier to think of simply as stack ports. For example, using the stack-group 0
command simply turns the lower port (port 9) into a stacking port. Similarly, stack-group 1, stack-
group 2
and stack-group 3 commands correspond to ports 10, 11 and 12 respectively.
NOTE: Stack-group is supported only in PMUX mode.
3 Continue to run the stack-unit 0 stack-group <0-3> command to add additional stack ports to
the switch, using the stack-group mapping.
Cabling the Switch Stack
Dell PowerEdge FN I/O Aggregators are connected to operate as a single stack in a ring topology using the
SFP+ or Base-T ports on the front end ports 9 and 10. To create a stack in either a ring or daisy-chain
topology, you can use two units on the same chassis or up to six units across multiple chassis.
Prerequisite: Before you attach the stacking cables, all Aggregators in the stack must be powered up with the
default or reconfigured settings.
To connect stacking ports, use only SFP+ transceivers, SFP+ cables and BaseT and its supported cables
(separately purchased). For example:
1 Insert a cable in port 9 on the first aggregator.
2 Connect the cable to port 10 on the next aggregator.
3 Continue this pattern on up to 6 aggregators.
4 Connect a cable from port 9 on the last aggregator to port 10 on the first aggregator. This creates a ring
topology.
NOTE
: The resulting topology allows the stack to function as a single switch with resilient failover
capabilities.
Stacking 854