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The screen shows the number of frames discarded on the HSTR port in both
inbound (from HSTR) and outbound (to HSTR) directions. The discard reasons are
described in the lists that follow.
Discarded Inbound Frames
The following discard reasons are defined for inbound frames:
•
Invalid VLAN
The frame was received on an unknown VLAN. The frame was either a VLAN
tagged frame containing an unknown VLAN ID, or an untagged frame when
no untagged virtual ports are defined. Make sure that the 802.1Q VLAN ID
and virtual port tagging mode is set to the same value on both sides of the
connection.
•
Invalid Route
The frame had an invalid Route Information Field (RIF). Possible reasons are
because the frame:
— Had an odd or zero RIF length.
— Was too small to contain a RIF.
— Was an explorer frame with a backward RIF.
— Was a non-explorer frame with a RIF length of 4.
•
Invalid VLAN Tag CFI
A VLAN tagged frame had an invalid Canonical Format Indicator (CFI). The
CFI is a bit in the Tag Control Information field of a VLAN tag. This bit
indicates the bit order of any MAC addresses in the information field. It is 0 for
Ethernet format and 1 for Token-Ring format. It should thus always be 1 in
received frames.
CrossFire 8650/8651 UEM Guide to Operation, DOC-7090 v. 1.0
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4. Statistics
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