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SNMP Downloads
Downloads using SNMP sets to the pcomLoad group are not supported in this release. Use the Download
Software Menu within the console interface to upgrade the module.
OBM and Console Ports Not Supported
The OBM and console ports on the back panel of the DEChub ONE and DEChub ONE-MX are not
supported. Use the front console port on the DIGITAL MultiSwitch Fast Ethernet Switch 924TXG module
to configure the module.
Activity LED Response on Ports Remapped to the Hub Backplane
On ports remapped to the HUB backplane, the activity LED should flicker orange when there is receive or
transmit activity between the switch and the backplane. However, if a cable with network traffic is plugged
into the front-panel port, the activity LED will turn green according to the cable traffic. The green LED
indication overrides the orange indication from the backplane traffic. Although the cable is isolated from
the switch and the backplane (i.e., the port has been remapped to the backplane), the LED indication still
reflects cable traffic when a cable is connected. The fix for this is to remove the cable from the front-panel
port (for those ports that have been remapped to the backplane).
MultiSwitch 900 v5.5 Backplane Connection Restrictions
The increased number of 924TXG backplane connection subtypes available (i.e., 100Mb Half-Duplex,
100Mb Full-Duplex, etc.) creates a restriction within the MultiSwitch 900 (versions v5.5 and earlier). This
restriction limits the number of modules that can be used for backplane interconnect. This limitation will be
fixed in a later release of the MultiSwitch 900.
In V5.5 and earlier versions, the MultiSwitch 900 maintains a LAN Interconnect configuration table of up
to 256 subtypes. Each module supports a defined number of subtypes (see table below for the number of
subtypes on specific products). When a module is powered on within the MultiSwitch 900, the module’s
total number of subtypes is added to the MultiSwitch 900’s configuration table. Once the configuration table
is filled to capacity or when the number of entries available in the table does not accommodate the number
of subtypes on a newly inserted module, all subtypes on that module will be ignored and none of its ports
will be usable on the backplane.
An indication that this limitation has been exceeded (or that the number of subtypes of a module could not
fit within the MultiSwitch 900’s LAN Interconnect table) can be observed in the clearVISN LAN
Interconnect screen. Attempts to expand a view of the module will fail such that no backplane capable ports
will be displayed.
NOTE
This limitation only affects backplane connectivity. All other
features of the module are unaffected.