3Com 3C63311 Reference Guide - Page 208

Ethernet Statistics, Bridge Identifier

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196 CHAPTER 5: PATHBUILDER S330 DIAGNOSTICS AND PERFORMANCE STATISTICS Ethernet Statistics Transmitted Frames-The total number of frames transmitted at this port. Transmitted bytes-The total number of bytes transmitted at this port. Received Frames-The total number of frames received at this port. Received bytes-The total number of bytes received at this port. CRC errored frames-The number of frames with CRC errors detected at this port. Late collisions-The number of times that a collision has been detected on this port later than 512 bit-times into the transmission of a packet. Deferred transmits-The number of frames for which the first transmission attempt at this port was delayed because the port was busy. This count does not include frames involved in collisions. Single collisions-The number of successfully-transmitted frames at this port for which transmission is inhibited by exactly one collision. Multiple collisions-The number of successfully-transmitted frames at this port for which transmission is inhibited by more than one collision. Excessive collisions-The number of frames for which transmission at this port failed due to excessive collisions. Carrier sense errors-The number of times that the carrier sense condition was lost or never asserted when attempting to transmit a frame at this port. Internal transmit errors-The number of frames for which reception at this port failed due to an internal MAC sublayer receive error. Oversized frames-The number of frames received at this port that exceeded the maximum permitted frame size. The Ethernet ATM Statistics screen displays the following ATM VC statistics for the Ethernet port: VC#-The system-assigned virtual circuit number. (Side A) card s/p-The slot and port number for side A of the circuit. (Side A) rx-The receive VCI/VPI for side A. (Side A) tx-The transmit VCI/VPI for side A. (Side B) card s/p-The slot and port number for side B of the circuit. (Side B) rx-The receive VCI/VPI for side B.(Side B) tx -The transmit VCI/VPI for side B. (Side B) Desc-The user-entered description of the circuit. Spanning Tree Statistics The Spanning Tree Statistics screen displays the following statistics: Bridge Identifier-The bridge address of the Ethernet port. Root Bridge-The bridge root address of the Ethernet port. Designated Bridge ID-The designated Spanning Tree bridge ID of this port. Hello Time-The time interval between issuing STP (Spanning Tree Protocol) configuration messages.

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196
C
HAPTER
5: P
ATH
B
UILDER
S330 D
IAGNOSTICS
AND
P
ERFORMANCE
S
TATISTICS
Ethernet Statistics
Transmitted Frames
—The total number of frames transmitted at this port.
Transmitted bytes
—The total number of bytes transmitted at this port.
Received Frames
—The total number of frames received at this port.
Received bytes
—The total number of bytes received at this port.
CRC errored frames
—The number of frames with CRC errors detected at this
port.
Late collisions
—The number of times that a collision has been detected on this
port later than 512 bit-times into the transmission of a packet.
Deferred transmits
—The number of frames for which the first transmission
attempt at this port was delayed because the port was busy. This count does not
include frames involved in collisions.
Single collisions
—The number of successfully-transmitted frames at this port for
which transmission is inhibited by exactly one collision.
Multiple collisions
—The number of successfully-transmitted frames at this port
for which transmission is inhibited by more than one collision.
Excessive collisions
—The number of frames for which transmission at this port
failed due to excessive collisions.
Carrier sense errors
—The number of times that the carrier sense condition was
lost or never asserted when attempting to transmit a frame at this port.
Internal transmit errors
—The number of frames for which reception at this port
failed due to an internal MAC sublayer receive error.
Oversized frames
—The number of frames received at this port that exceeded
the maximum permitted frame size.
The Ethernet ATM Statistics screen displays the following ATM VC statistics for the
Ethernet port:
VC#
—The system-assigned virtual circuit number.
(Side A) card s/p
—The slot and port number for side A of the circuit.
(Side A) rx
—The receive VCI/VPI for side A.
(Side A) tx
—The transmit VCI/VPI for side A.
(Side B) card s/p
—The slot and port number for side B of the circuit.
(Side B) rx
—The receive VCI/VPI for side B.(Side B) tx —The transmit VCI/VPI for
side B.
(Side B) Desc
—The user-entered description of the circuit.
Spanning Tree Statistics
The Spanning Tree Statistics screen displays the following statistics:
Bridge Identifier
—The bridge address of the Ethernet port.
Root Bridge
—The bridge root address of the Ethernet port.
Designated Bridge ID
—The designated Spanning Tree bridge ID of this port.
Hello Time
—The time interval between issuing STP (Spanning Tree Protocol)
configuration messages.