8-14 CHAPTER 8: ADMINISTERING FDDI RESOURCES

Table 8-4 Description of Fields for FDDI MAC Attributes (continued)

Field

Description

 

 

tvxCapab

Maximum time value of the valid transmission timer that this MAC

 

can support

tvxExpiredCount

Number of times that this MAC’s valid transmission timer has

 

expired

tvxValue

Value of the valid transmission timer in use by this MAC

txByteRate

Average number of bytes transmitted per second by this MAC

 

during the most recent sampling period

txBytes

Number of bytes transmitted by this MAC, including framing

 

characters

txDiscards

Number of frames discarded because LLC Service was not enabled

 

or the FDDI ring was not operational

txFrameRate

Average number of frames transmitted per second by this MAC

 

during the most recent sampling period

txFrames

Number of frames transmitted by this MAC. (Note that this

 

number does not include MAC frames.)

txInternalErrs

Number of frames discarded because of an internal hardware

 

error during transmission

txMulticasts

Number of multicast frames queued for transmission by a

 

higher-level protocol or application, including frames not

 

transmitted successfully

txPeakByteRate

Peak value of fddiMACByteTransmitRate for this MAC since the

 

station was last initialized

txPeakFrameRate

Peak value of fddiMACFrameTransmitRate for this MAC since the

 

station was last initialized

txQOverflows

Number of frames discarded because the transmit queue was full

txUnicasts

Number of unicast frames queued for transmission by a

 

higher-level protocol or application, including frames not

 

transmitted successfully

upstream

MAC address of this MAC’s upstream neighbor

Frame Processing and FDDI MAC Statistics

upstreamDupAddr Indicates whether the address upstream of this address is duplicated on the ring

All frames on the FDDI network are received promiscuously by an FDDI MAC. However, a frame might be discarded for the following reasons:

There is no buffer space available.

The frame is in error.

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3Com 2200 manual There is no buffer space available Frame is in error