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Cajun P220, P550, P550R Switch Release Notes, Release 4.0.1 23
For ports that have a 3Com trunking format, the receiving end of the trunked port attempts to
interpret the clear BPDUs as trunked packets. Consequently, these BPDUs are discarded at the
receiving end. For Spanning Tree to function properly with 3Com trunked ports, the Spanning
Tree mode should be set to per-VLAN. In per-VLAN Spanning Tree, there is one instance of
Spanning Tree for each VLAN and the BPDUs are tagged with the VLAN ID, ensuring they are
interpreted correctly on the receiving end.
NOTE: Although this restriction does not apply to ports that use IEEE 802.1Q or Multi-
Layer trunking modes, it is still recommended that you set Spanning Tree to per-VLAN
when using trunked ports. This prevents an entire link from being blocked when there is
a loop in one VLAN.
TFTP
File Naming Standard for Embedded NVRAM File System
NOTE: All NVRAM files must use an 8.3 format for file names.
When downloading code to the NVRAM file system, use standard 8.3 file naming conventions
(the default download file names do not use this convention).
TFTP Download Status Delay
It takes a few seconds before the Status button on the TFTP Download screen returns accurate
information.