Lucent Technologies Cajun Switch P220 - Manual (Page 14)

Cajun P220, P550, P550R Switch Release Notes, Release 4.0.1 14
Front Panel Display
Problem:
The 'lastlink' application on the front panel display does not work on the
Cajun P220FE or P220G.
Workaround: Currently, no workaround is available.
Hardware
Frames Transmitted with CRC Errors
For the Cajun P550 20-port Module, Model M5520-100TX (P/N 311-0020-000: Revision Level
A or B), and the Cajun P550 12-port Module, Model M5512R-100TX, a temperature sensitivity
problem has been found when operating at 10Mbps. This sensitivity will result in the port
transmitting frames with CRC errors. These frames, since they have CRC errors, are then
dropped by the receiving station. Note that this problem only occurs at 10Mbps. 100Mbps
operation is not affected.
Software Release v1.0.17 (or later) has implemented a new configuration that disables the
power saving mode of the Phy chip. Disabling the power saving mode has the effect of moving
the operational temperature of the part past the problem range. Testing this software
configuration is 100% successful in resolving the error.
The software configuration command is only available from the CLI. It is saved in NVRAM.
Users should only disable the power saving mode for ports that are experiencing this problem.
Disabling the power saving mode for parts that are operating at a lower temperature than the
problem range may accidentally raise the temperature into the problem range. In legacy-cli
mode, use the following command to disable the power saving mode for ports:
Cajun> port set DisablePowerSave <slot>.<port> on
NOTE: To enter legacy mode, type
legacy-cli
at the command prompt. To return to
the Enhanced CLI from legacy mode, type
exit
at the command prompt.
Hot Swap Modules
Hot swapping modules may cause SEPROM and SMAC panic messages to appear in the event
log. These messages are for informational purposes only and should be ignored.