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Appendix A. Configuring Advanced User Parameters
252 PACSystems* RX7i & RX3i TCP/IP Ethernet Communications User Manual GFK-2224Q
Caution
The IEEE 802.3 standard strongly discourages the manual configuration of
duplex mode for a port (as would be possible using AUP.) Before manually
configuring duplex mode for a port using AUP, be sure that you know the
characteristics of the link partner and are aware of the consequences of your
selection. In the words of the IEEE standard: "Connecting incompatible DTE/MAU
combinations such as full-duplex mode DTE to a half-duplex MAU, or a full-
duplex station (DTE or MAU) to a repeater or other half-duplex network, can lead
to severe network performance degradation, increased collisions, late collisions,
CRC errors, and undetected data corruption."
Note: If the speed and duplex mode of a port are forced using Advanced User Parameters, the
switch will no longer perform automatic cable detection. This means that if you have the
switch port connected to a switch or hub port you must use a crossover cable. If you have
the switch port connected to the uplink port on a switch or hub or if you have the switch
port connected to another Ethernet device you must use a normal cable.
A-1 Format of the Advanced User Parameters File
The AUP file must have this format:
AUP_ r _ s.apf
where r and s indicate the Rack and Slot location of the Ethernet Interface. (For an embedded Ethernet
interface, r and s indicate the Rack and Slot location of the CPU module.)
<parameter name> = <parameter value>
<parameter name> = <parameter value>
<parameter name> = <parameter value>
Important Note:
1. This format is not used for the CPE330 or CPE400. AUP parameters are located in the PME
Ethernet configuration.
2. Entering an invalid AUP parameter within the AUP file will force a Stop Faulted condition in the
CPU. Additionally, two faults should appear in the Controller Fault Table.
a. “Unable to deliver configuration to module”
b. “LAN system-software fault; resuming” the extra fault data should indicate that a AUP
file has caused the faulted condition along with a pointer to line with the invalid entry.
The AUP file has the following requirements:
▪
The first line of the file must consist only of the text: AUP_
r
_
s
where r and s indicate the Rack and Slot location of the Ethernet Interface (or, for an embedded Ethernet
interface, the location of the CPU module).
(For example, an Ethernet Module in rack 0, slot 11 would be indicated as AUP_0_11.
This is intended as a convenient way to differentiate AUP files for different modules. Any rack and slot
number will do, so that the same AUP file can be imported for use by multiple Ethernet interfaces if desired.
▪
All parameter names are lowercase. The equal sign (=) is required between the parameter name and
parameter value.
▪
Spaces are allowed, but not required, between the parameter name and the equal symbol (=) and between
the equal symbol and the parameter value.