IBM 4002-Y2A, Installation And User Manual

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5. One device in the stack will operate as the Active Controller, one will operate
as Standby Controller, with the rest of the units operating as stack members.
For information about how to configure your stack, see the
FastIron
Configuration Guide .
4002-Y2A, Y4A, Y2C, and Y4C devices
Figure 23 on page 21 and Figure 24 on page 21 show how stacking cables are
connected between 4002-Y2A, Y4A, Y2C, and Y4C devices in a stack. The
connection is based on 10 Gbps SFP+ using LC-LC MM fiber cables. These devices
support linear and ring stack topologies with the optional SFP+ modules installed,
and can also operate in standalone mode.
Note: 4002-Y2A, Y4A, Y2C, and Y4C devices must have a 4-port 10 Gbps SFP+
module (optional) installed to operate in a stack.
You can form a stack containing up to 4002-Y2A, Y4A, Y2C, and Y4C units. The
first two ports on the 4-port 10 GbE SFP+ module are pre-configured to support
stacking.
Note: If you want to use all four ports on the four-port 10 Gbps SFP+ module to
pass regular traffic the global CLI command,
stack disable , must be
configured on the device to disable stacking.
To connect switches in a stack, complete the following steps:
nety026
Figure 22. Connecting switches in linear (top) and ring (bottom) topology stacks
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Ethernet y-series Installation and User Guide: Installation and User Guide