User's Manual

Installing and Setting Up the CMC 33
Basic CMC Network Connection
For the highest degree of redundancy, connect each CMC to your
management network. If a chassis has just one CMC, make one connection
on the management network. If the chassis has a redundant CMC in the
secondary CMC slot, make two connections to the management network.
Each CMC has two RJ-45 Ethernet ports, labeled GB1 (the uplink port) and
STK (the stacking port). With basic cabling, you connect the GB1 port to the
management network and leave the STK port unused.
Daisy-chain CMC Network Connection
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. If each of four chassis contains a redundant CMC, by daisy-chaining
you reduce the number of management network connections required from
eight to two. If each chassis has only one CMC, you reduce the connections
required from four to one.
When daisy-chaining chassis together, GB1 is the uplink port and STK is the
stacking port. A GB1 port must connect to the management network or to the
STK port of the CMC in a chassis that is closer to network. The STK port
must only receive a connection from a GB1 port further from the chain or
network.
Create separate chains for the CMCs in the primary CMC slot and the
second CMC slot.
Figure 2-1 illustrates the arrangement of cables for four daisy-chained chassis,
each with CMCs in the primary and secondary slots.