Spirent SmartBits System, Reference Manual

Page: 182 / 278

Chapter 13: Token Ring Cards
Token Ring Counters
174 SmartBits System Reference
Token Ring Counters
The counters can hold a maximum of 2
32-1
counts before cycling. All counters can
display either rates or events. The Token Ring port counter window in SmartWindow can
display only 10 counters at a time; the default counters are:
•
Transmit Packet Counter.
•
Receive Packet Counter.
•
FCS Error Counter.
•
Oversize Packet Counter.
•
Undersize Counter.
•
Bytes Received Counter.
•
Trigger Counter.
•
MAC Frame Counter.
•
Abort Frames Counter.
•
Token Rotation Time.
Additional available counters are error counters derived from decoding MAC frames:
•
Line Errors.
•
Internal Errors.
•
Burst Errors.
•
A/C Errors.
•
Abort Errors.
•
Lost Frame Receiver Congestion.
•
Frame Copied, Frequency Errors.
•
Token Errors.
•
Purge Events.
•
Beacons.
•
Claim Events.
•
Insertions.
All undisplayed counters are continuously active and can be chosen at any time without
affecting their contents.