3Com 3C63400-3AC-C - PathBuilder S700 Switch, Справочное руководство

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236 C
HAPTER
6: P
ATH
B
UILDER
S700 D
IAGNOSTICS AND
P
ERFORMANCE
M
ONITORING
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.
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.
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.
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.
Alignment Errors —The total number of alignment errors detected for the
bridged physical port since the statistics were last cleared.
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.
Forward Delay —The amount of time in the “learning” and “listening” states;
half the amount of time that must elapse between the time when it is decided
that a port should become part of the Spanning Tree and the time when data
traffic is allowed to be forwarded to and from that port.
Maximum Age —The time at which a configuration message is discarded.
Port Identifier —The bridge root port of the Ethernet port.
Root Path Cost —The bridge root path cost of the Ethernet port.
Designated Port ID —The designated Spanning Tree bridge port ID of this port.
Topology Changed —The topology change state of Spanning Tree for this port.