User's Manual

34 Installing and Setting Up the CMC
Figure 2-4. Incorrect Cabling for CMC Network Connection - 2 CMCs
Follow these steps to daisy-chain up to four chassis:
1
Connect the GB port of the active CMC in the first chassis to the
management network.
2 Connect the GB port of the active CMC in the second chassis to the STK
port of the
active CMC in the first chassis.
3 If you have a third chassis, connect the GB port of its active CMC to the
STK port of the
active CMC in the second chassis.
4 If you have a fourth chassis, connect the GB port of its active CMC to the
STK port of the third chassis.
5 If you have redundant CMCs in the chassis, connect them using
the same pattern.
CAUTION: The STK port on any CMC must never be connected to the
management network. It can only be connected to the GB port on another chassis.
Connecting a STK port to the management network can disrupt the network and
cause a loss of data. Cabling GB and STK to the same network (broadcast domain)
can cause a broadcast storm.
NOTE: Never connect an active CMC to a standby CMC.
NOTE: Resetting a CMC whose STK port is chained to another CMC can disrupt the
network for CMCs that appear later in the chain. The child CMCs may log messages
indicating that the network link has been lost and they may fail over to their
redundant CMCs.