Nortel 10BASE-T Using Manual page 58

Using the BayStack 410-24T 10BASE-T Switch
You must ensure that the Interoperability Software Version Numbers (ISVNs) are
identical. That is, the ISVN for the BayStack 450 and 410-24T must be the same
as the ISVN for the Business Policy Switch.
Note: If the ISVNs are different, only the units that have the same ISVN as the
base unit will form a stack.
You can verify your switch software version and ISVN in the sysDescr field of the
System Characteristics screen (see
Also, for correct operation in a mixed stack configuration, the Business Policy
Switch must be configured as the base unit.
Note: If you do not designate the Business Policy Switch as the base unit, the
mixed stack will not operate.
Note: BayStack 450 Switches that are configured with (optional)
BayStack 450-2M3/2S3 MDAs will not operate in a mixed stack configuration
that includes one or more Business Policy Switches.
You can connect up to eight switches to provide uninterrupted connectivity for up
to 224 ports (see
manageable as a single unit. Installation instructions are provided with the
BayStack 400-ST1 Cascade Module (see your Nortel Networks sales
representative for ordering information).
Note: The BayStack 400-ST1 Cascade Module will not operate with
BayStack 450 switches that are configured with BayStack 450 software
versions earlier than version V1.1.0. You must upgrade the switches to
BayStack 450 software version V1.1.0 (or later) before you install the
BayStack 400-ST1 Cascade Modules.
If you need to upgrade your BayStack 450 switches, refer to the upgrade
instructions provided in the Installing the BayStack 400-ST1 Cascade Module
guide.
1-28
"System
"Fail-Safe Stack Application" on
Characteristics" on page
page 1-26). The entire stack is
3-15).
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