A-6
Installation and Reference Guide
Product Specifications
A
The port requires a straight serial cable with a female 9-pin subminiature-D connector. Only pins 2,
3, and 5 are supported; if pin 7 is used, the signal must always be driven high, using the pinouts
listed in the following table.
The cabling pinouts required if pin 7 is used are listed in the following table.
POST Specifications
The switch performs POST by default when the switch is turned on, rebooted, or the system is
reset. POST includes a number of diagnostic tests: the success/fail test results can be monitored
through the LED activity, the error log, or command-line interface.
POST lasts approximately 2.5 minutes and includes the following steps:
1.
Preliminary POST diagnostics are run.
2.
Operating system is initialized.
3.
Hardware is initialized.
4.
Diagnostic tests are run on a number of functions, including internal connections and
circuitry, port functionality, ability to send and receive frames, ability to implement
QuickLoop functionality, all aspects of memory, parity, statistics counters, and correct
serialization.
5.
Universal port configuration is performed.
6.
Links are initialized.
7.
Fabric is analyzed. If ports are connected to other fabric elements, the principal switch in
the fabric is identified.
8.
Port addresses are assigned. The switch attempts to retain any previously assigned port
addresses.
9.
Unicast routing tables are constructed.
10. Normal port operation is enabled.
PIN
Signal
Description
1
2
TxData
Transmit data
3
RxData
Receive data
4
5
GND
Logic ground
6
7
CTS
Clear to send
8
9
