3Com 3C780 User Guide - Page 104

MAC Statistical, Components, Functions of Listed Components

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5-2 Using the Hub >sh fstats Raw frame statistics for primary MAC: Total transmit frames = 632 Total received frames = 1561 Total transmit SMT frames = 550 Total received SMT frames = 1513 Total transmit LLC frames = 83 Total received LLC frames = 48 Total received short frames = 0 Total received invalid frames = 0 Total aborts = 0 Received resets = 0 Directed beacons entered = 0 Directed beacons sent = 0 Figure 5-2. Display of MAC Frame Statistics Table 5-1 defines the elements for which MAC statistics were collected and displayed in Figure 5-2. Table 5-1. Components Polled by the show fstats Command MAC Statistical Components SMT (station management) frames Functions of Listed Components Provide network statistics, detect network faults, and tune configuration and operational parameters LLC (logical link control) frames Short frames Provide an interface between the MAC and the higher-level protocols operating in the hub Indicate invalid data length Invalid frames Aborts Resets Directed beacons Contain incorrect contents Indicate the termination of the operation, which may be caused by lack of memory Reinitialize the hub Inform the management station that the local MAC is stuck at beacon (indicating a serious ring failure)

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5-2
Using the Hub
>sh fstats
Raw frame statistics for primary MAC:
Total transmit frames
= 632
Total received frames
= 1561
Total transmit SMT frames
= 550
Total received SMT frames
= 1513
Total transmit LLC frames
= 83
Total received LLC frames
= 48
Total received short frames
= 0
Total received invalid frames = 0
Total aborts
= 0
Received resets
= 0
Directed beacons entered
= 0
Directed beacons sent
= 0
Figure 5-2.
Display of MAC Frame Statistics
Table 5-1 defines the elements for which MAC statistics were collected and
displayed in Figure 5-2.
Table 5-1.
Components Polled by the
show fstats
Command
MAC Statistical
Components
Functions of Listed Components
SMT (station
Provide network statistics, detect network
management) frames
faults, and tune configuration and operational
parameters
LLC (logical link
Provide an interface between the MAC and the
control) frames
higher-level protocols operating in the hub
Short frames
Indicate invalid data length
Invalid frames
Contain incorrect contents
Aborts
Indicate the termination of the operation, which
may be caused by lack of memory
Resets
Reinitialize the hub
Directed beacons
Inform the management station that the local
MAC is stuck at beacon (indicating a serious
ring failure)