The CMC has
two RJ-45 Ethernet ports, labeled Gb1 (the uplink port) and STK/Gb2
(the stacking or cable consolidation port). With basic cabling, you
can connect the Gb port to the management network and leave the STK/Gb2
port unused.
CAUTION: Connecting the STK/Gb2 port to the management network
will have unpredictable results if the CMC setting is not changed
from default Stacking to Redundant, to implement NIC failover. In the default Stacking mode,
cabling the Gb1 and STK/Gb2 ports to the same network (broadcast domain)
can cause a broadcast storm. A broadcast storm can also occur if the
CMC setting is changed to Redundant mode, but
the cabling is daisy chained between chassis in the Stacking mode. Ensure that the cabling model matches the CMC setting for
the intended usage.
NOTE: The STK/Gb2 port can
also be used for CMC NIC failover. Ensure that the CMC setting is
changed from default Stacking to Redundant to implement NIC failover.
If you have
multiple chassis in a rack, you can reduce the number of connections
to the management network by daisy-chaining up to four chassis together.
This reduces the connections required from four to one.
When daisy-chaining chassis together, Gb1 is the uplink port and
STK/Gb2 is the stacking (cable consolidation) port. Connect the Gb
ports to the management network or to the STK port of the CMC in a
chassis that is closer to the network. You must connect the STK port
only to a Gb port that is further from the chain or network.
NOTE: The CMC must be installed
for the system to power on. See the PowerEdge FX2/FX2s CMC User’s
Guide at Dell.com/poweredgemanuals for complete instructions
on setting up and operating the CMC module.
Figure 1. CMC daisy-chaining
management network
CMC
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