Technical data

CSMA-CD PORT
CSMA-CD PORT
Format
node-name"user-name password"::"CSMA-CD PORT port-name"
node-name
Specifies the name of the router node.
user-name
Specifies the user name associated with the remote CTF object.
password
Specifies the password associated with the remote CTF object.
port-name
Specifies the name of the CSMACD PORT entity to be traced.
Description
This traces the DATA part of ETHERNET frames and the 802.2 LLC PDU part of
802.3 frames. Table A–6 lists the events recognized at this tracepoint.
Table A–6 CSMA-CD PORT Trace Events for DECnet–VAX
Trace Event Description
RX Receive
TX Transmit
Note that you cannot specify the /FULL qualifier in a START or ANALYZE
command for this tracepoint.
Example
$ TRACE START mynode"myname mypw"::"CSMA-CD PORT CSMACD-0"/LIVE
produces the following output:
-----------+----+-----+<-----802.2 Frame Header----->+
Time |Evnt|Data |Dst Src C P Type N N |
hh mm ss cc| |Size |SAP SAP R F R/S R/S |
-----------+----+-----+<-----------------------------+
13:16:44.04|RX | 31| Ethernet (length = 29) |
13:16:44.07|RX | 31| Ethernet (length = 29) |
13:16:44.29|RX | 1500| SNAP (PID = 08-00-2B-60-03) |
13:16:44.40|RX | 35| FE FE C UI |
13:16:44.46|RX | 31| Ethernet (length = 29) |
13:16:44.73|RX | 1500| SNAP (PID = 08-00-2B-60-03) |
13:16:44.76|TX | 26| FE FE C UI |
13:16:44.79|TX | 26| FE FE C UI |
13:16:44.82|TX | 26| FE FE C UI |
13:16:44.88|RX | 1500| SNAP (PID = 08-00-2B-60-03) |
13:16:44.90|RX | 76| Ethernet (length = 74) |
13:16:44.93|RX | 36| Ethernet (length = 34) |
13:16:44.96|RX | 1500| SNAP (PID = 08-00-2B-60-03) |
A–8 DEC WANrouter 100/500 Tracepoints