Displaying Ethernet Port Information

7-7

Frames are delivered to an Ethernet port by bridge and management applications. However, a frame may be discarded for the following reasons:

The Ethernet port is disabled.

There is no room on the transmit queue.

An error occurred during frame transmission.

Figure 7-2 shows the order in which these discard tests are made.

Transmit Frame Statistics. . .

txUcastFrames txMcastFrames

txDiscards

txQOverflows

excessDeferrals excessCollision carrierSenseErr txInternalErrs

txFrames

Frames delivered to this port

Frames discarded because port disabled

Frames discarded because transmit queue full

Frames discarded because transmit error during transmission

=Frames successfully transmitted to the network

processing of frames

. . .to Ethernet Network

Figure 7-2 How Frame Processing Affects Ethernet Transmit Frame Statistics

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3Com 2200 manual TxDiscards TxQOverflows, TxFrames Frames delivered to this port