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Known Conditions
This section describes conditions and restrictions related to the DIGITAL MultiSwitch Fast Ethernet Switch
924TXG Version 1.1.1 firmware.
DIGITAL MultiSwitch 900 Resets may adversely affect MultiSwitch 924TXG LAN
Interconnect configurations
The DIGITAL MultiSwitch 900 maintains and controls LAN Interconnect configuration tables for modules
that are connected to backplane LANs. This information is shared with clearVISN in establishing backplane
connections and is displayed within clearVISN’s LAN Interconnect window.
The following may arise when a reset occurs on the MultiSwitch 900 and there is no reset (at that same time)
on the MultiSwitch 924TXG:
• The MultiSwitch 900 loses the current LAN Interconnection information for the MultiSwitch
924TXG and clears the database of any connections the module may still have. (This is a
MultiSwitch 900 limitation and will be fixed in a later release.)
• clearVISN and the MultiSwitch 924TXG module retain the backplane configuration data they
had before
the MultiSwitch 900’s reset. clearVISN continues to display the connections in the
LAN Interconnect window and the module’s LEDs continue to blink. However, since this
information is no longer in synchronization with the MultiSwitch 900’s control database, it is
considered “stale” and not valid.
• Any subsequent attempts to remove or establish backplane connections to the MultiSwitch
924TXG using clearVISN will fail.
To regain synchronization between the MultiSwitch 900, clearVISN and the MultiSwitch 924TXG and to
recover LAN Interconnect capabilities on the MultiSwitch 924TXG, do the following:
• Reset all MultiSwitch 924TXGs that are in the hub.
• Click on the “Refresh” button in clearVISN’s LAN Interconnect window to update clearVISN
to the MultiSwitch 900’s configuration tables.
For notification of MultiSwitch 900 resets, an SNMP trap address may be set up to monitor and record the
MultiSwitch 900 events.
Walking SNMP v2 Objects through the 900 Hub
MIB objects of type COUNTER64 (SNMP v2) cannot be walked through the MultiSwitch 900 hub. The
MultiSwitch 924TXG has several objects with this data type. In order to walk these objects you must walk
the MultiSwitch 924TXG through a front-panel port using its own IP address and community string.
TFTP Filename Length
The length of TFTP filenames is restricted to 37 characters or less. Any attempt to set a filename exceeding
37 characters will cause the switch to reset.