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9033645-01 VH-2402S User Interface 59
Displaying Port Statistics
Port Statistics display key statistics from the Ethernet-like MIB for each
port. Error statistics on the traffic passing through each port are displayed.
This information can be used to identify potential problems with the switch
(such as a faulty port or unusually heavy loading). The values displayed
have been accumulated since the last system reboot.
Select the required stack unit, and port or module. The statistics displayed
are indicated in the following figure and table.
Figure 2-46. Port Statistics
Vertical Horizon Local Management -- VH-2402S
Port Statistics :
Unit 1 Port 1
EtherLike Counter:
Alignment Errors :0 Late Collisions :0
FCS Errors :0 Excessive Collisions :0
Single Collision Frames :0 Internal MAC Transmit Errors:0
Multiple Collision Frames:0 Carrier Sense Errors :0
SQE Test Errors :0 Frames Too Long :0
Deffered Transmissions :0 Internal MAC Receive Errors :0
[Refresh Statistics] Show port : 1
[Reset Counters] [Show]
<OK> <PREV UNIT> <NEXT UNIT> <PREV PORT> <NEXT PORT>
Use <TAB> or arrow keys to move. <Enter> to select.
Parameter Description
Alignment Errors For 10 Mbps ports, this counter records alignment errors (mis-
synchronized data packets). For 100 Mbps ports, this counter
records the sum of alignment errors and code errors (frames
received with rxerror signal).
FCS Errors The number of frames received that are an integral number of
octets in length but do not pass the FCS check.
Single Collision
Frames*
The number of successfully transmitted frames for which
transmission is inhibited by exactly one collision.
Multiple Collision
Frames*
A count of successfully transmitted frames for which transmission
is inhibited by more that one collision.
SQE Test Errors* A count of times that the SQE TEST ERROR message is
generated by the PLS sublayer.
Deferred
Transmissions*
A count of frames for which the first transmission attempt on a
particular interface is delayed because the medium was busy.
Late Collisions The number of times that a collision is detected later than 512 bit-
times into the transmission of a packet.
Excessive Collisions* The number of frames for which transmission failed due to
excessive collisions.