NS 3000/iX LAP-B Link Statistics
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LINKSTATE Parameter Fields
The following is an example of the data that is displayed when you issue the LINKCONTROL linkname;STATUS=LINKSTATE command:
Linkname: LAPB20 Linktype: LAPB Linkstate: CONNECTED LEVEL 2Linkname — The Linkname field specifies the name of the link. Linktype — This Linktype specifies the type of link, such as LAP-B or IEEE 802.3, that is being monitored. Linkstate — The Linkstate field specifies the current state of the link. The possible link states are as follows:
Not connected.
Connected level 1.
Connected level 2.
Connecting level 1.
Connecting level 2.
Disconnecting level 1.
Disconnecting level 2.
CONFIGURATION Parameter Fields
The CONFIGURATION parameter for LAP-B links displays the LINKSTATE parameter fields and many additional fields. These additional fields display information that is related to the link configuration and which, except for the Cable Type parameter, are input through the NMMGR configuration program. The following is an example of the data that is displayed when you issue the LINKCONTROL linkname;STATUS=CONFIGURATION command:
Physical Path 24 Phone Number 9D1D40898765432 Modullo Count 8 Cable Type RS232 Local Mode HP-HP Buffer Size 1024 Bytes LAPB Parm K 7 Connect Timeout 60 sec LAPB Parm T1 300 hsec Local Timeout 900 sec LAPB Parm N2 20 Transmission Speed 64000 bpsPhone Number — The Phone Number field displays the current automatic dial phone number, as specified in the NMMGR configuration file. Modulo Count — The Modulo Count field displays the maximum frame sequence number allowable for any frame in the network. This field can be set to a value of 8 or 128, meaning that frames are numbered from either 0 through 7, or 0 through 127. Cable Type — The Cable Type field displays the cable type that is currently connected to the PSI card. This data is provided by the PSI card and cannot be configured through NMMGR. The possible values for this field are as follows:
RS232
V35
Modem Eliminator
RS366
RS449
Loopback
None
HP-HP, for connection to another HP device configured as HP Point-to-Point.
DTE, for connection to a device that is configured as a DCE.
DCE, for connection to a device that is configured as a DTE.
STATISTICS Parameter Fields
The STATISTICS parameter for LAP-B links displays many fields in addition to the LINKSTATE parameter fields. The CONFIGURATION parameter fields are not displayed with this parameter. The following is an example of the data that is displayed when you issue the LINKCONTROL linkname;STATUS=STATISTICS command:
Connection Duration 23:25:01 Tracing OFF
Data Bytes Sent 63650 Data Bytes Received 62300
Overhead Bytes Sent 8592 Overhead Bytes Receivedf 8550
Total Frames Sent 1430 Total Frames Received 1425
Data Frames Sent 1253 Data Frames Received 1246
Aborted Frames Sent 62650 Aborted Received 0
DSR Losses 0 Oversized Frames Received 0
CTS Carrier Losses 0 Receive Overruns 0
DCD Carrier Losses 0 CRC Errors 0
Statistics Resets 0
Connect Duration — The Connect Duration field displays the length
of time that the current logical (level 2) connection has existed. If there is
no active connection, this field displays the length of time that the most
recently established connection was in existence. This field is reset with each
new connection.
Tracing — The Tracing field specifies whether tracing is currently
enabled or disabled.
Data Bytes Sent — The Data Bytes Sent field displays the number of
bytes that have been transmitted in the data portion of all data frames.
Data Bytes Received — The Data Bytes Received field displays the
number of bytes that have been received in the data portion of all data frames.
Overhead Bytes Sent — The Overhead Bytes Sent field displays the
total number of flags, level 2 address and control bytes, and frame check
sequence (FCS) bytes transmitted. This value should be equal to six times the
total number of frames transmitted.
Overhead Bytes Received — The Overhead Bytes Received field
displays the total number of flags, level 2 address and control bytes, and FCS
bytes received. This value should be equal to six times the total number of
frames transmitted.
Total Frames Sent — The Total Frames Sent field displays the total
number of frames transmitted.
Total Frames Received — The Total Frames Received field displays
the total number of frames received.
Data Frames Sent — The Data Frames Sent field displays the total
number of transmitted data frames.
Data Frames Received — The Data Frames Received field displays the
total number of received data frames.
Aborted Frames Sent — The Aborted Frames Sent field displays the
number of frames which were aborted before they were received. Normally, this
number should be quite low (below 3% of the total number of frames sent). A
large number could point to a noisy line or a weak or bad clock signal sent by
a modem. If this value becomes larger than 3% of the total number of frames
sent, and you feel that network performance is being affected, contact your HP
representative.
Aborted Frames Received — The Aborted Frames Received field
displays the number of frames which were aborted after they were received.
Normally, this number should be quite low (below 3% of the total number of
frames received). A large number could point to a noisy line or a weak or bad
clock signal sent by a modem. If this value becomes larger than 3% of
the total number of frames received, and you feel that network performance
is being affected, contact your HP representative.
DSR Losses — The DSR Losses field displays the number of times the
PSI detected a temporary loss of the Data Set Ready (DSR) signal on the cable.
On most lines, this will remain at a value of zero, although some modems will
periodically drop signals for very short intervals.
Oversized Frames Received — The Oversized Frames Received field
displays the number of frames received that exceed the maximum configured
buffer size as configured in the Link screen of NMMGR. A number other than zero
in this field indicates that the remote buffer size configuration is greater
than the local buffer size configuration. One or both configurations must be
modified so that the two buffer sizes are identical.
CTS Carrier Losses — The CTS Carrier Losses field displays the
number of times the PSI detected a temporary loss of the Clear to Send (CTS)
signal on the cable. On most lines, this will remain at a value of zero,
although some modems will periodically drop signals for very short intervals.
Receive Overruns — The Receive Overruns field displays the number
of times that the PSI card had to discard a frame because the PSI card could
not process the data as quickly as it arrived. A number in this field that is
greater than 3% of the total number of received frames indicates a possible
problem with the PSI card. If this number continues to increase,
contact your HP representative.
DCD Carrier Losses — The DCD Carrier Losses field displays the
number of times the PSI detected a temporary loss of the Data Carrier Detect
(DCD) signal on the cable. On most lines, this will remain at a value of zero,
although some modems will periodically drop signals for very short intervals.
CRC Errors — The CRC Errors field displays the number of frames
that were received with a bad Cyclic Redundancy Check (CRC) checksum. A large
number (greater than 1% of the total number of packets) indicates that a
problem may exist in the connection between the PSI and the modem, or between
the two modems.
Statistics Resets — The Statistics Resets field displays the
number of times that the statistics buffer (which contains the values for all
of the aforementioned fields) was reset. This value is reset each time the link
is restarted.
RESET Parameter Fields
The RESET parameter for LAP-B links resets all of the accumulated statistics for the links. This command also displays all of the LINKSTATE, CONFIGURATION, and STATISTICS parameter fields. Refer to the STATISTICS parameter for a description of the displayed fields.
ALL Parameter Fields
The ALL parameter for LAP-B links displays all of the LINKSTATE, CONFIGURATION, and STATISTICS parameter fields. This is an example of the ALL parameter output:
Linkname: LAPB20 Linktype: LAPB Linkstate: CONNECTED LEVEL 2
Physical Path 24
Phone Number 9D1D40898765432
Modulo Count 8 Cable Type RS232
Local Mode HP-HP Buffer Size 1024 Bytes
LAPB Parm K 7 Connect Timeout 60 sec
LAPB Parm T1 300 hsec Local Timeout 900 sec
LAPB Parm N2 20 Transmission Speed 64000 bps
Connection Duration 23:25:01 Tracing OFF
Data Bytes Sent 62650 Data Bytes Received 62300
Overhead Bytes Sent 8592 Overhead Bytes Received 8550
Total Frames Sent 1430 Total Frames Received 1425
Data Frames Sent 1253 Data Frames Received 1246
Aborted Frames Sent 62650 Aborted Received 0
DSR Losses 0 Oversized Frames Received 0
CTS Carrier Losses 0 Receive Overruns 0
DED Carrier Losses 0 CRC Errors 0
Statistics Resets 0
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Appendix A LINKCONTROL Command |
NS 3000/iX LAN Link Statistics |