1 – CHANNEL
Displays PEdriver channel information for specific nodes. Each
channel is a single NISCA communications path between a LAN
device on a local system and a LAN device on a remote system.
Use the SHOW CHANNEL command to display node names and local and
remote device names.
Format
SHOW CHANNEL nodename
1.1 – Parameter
nodename[,...]
Includes channels to specific nodes, which you can use wildcards
to specify. Each node name can be accompanied by optional
qualifiers to specify local and remote device names. If no local
or remote device name is specified, all channels associated with
the specified node name are included.
1.2 – Qualifiers
1.2.1 /ALL
Includes all channel data.
1.2.2 /COUNTERS
Includes channel counters data.
1.2.3 /ECS
/ECS
/NOECS
Includes only channels that are (or are not) members of the ECS.
1.2.4 /EXCLUDE
/EXCLUDE=(nodename[,...])
Excludes channels to specific nodes, which you can use wildcards
to specify. Each node name can be accompanied by optional
qualifiers to specify local and remote device names. If no local
or remote device name is specified, all channels associated with
the specified node are included.
1.2.5 /INTERVAL
For the /COUNTERS display, displays the changes to counters since
the last SHOW command.
1.2.6 /LOCAL_DEVICE
/LOCAL_DEVICE=(landevicename/IPinterfacename[,...])
Includes specific LAN devices that identify the local end of the
channel; you can use wildcards to specify LAN devices.
Use the SHOW LAN_DEVICE command to display device names.
1.2.7 /n
Displays the nth page. To select a particular page of a multipage
display, specify the number of the page you want to display.
1.2.8 /OUTPUT
/OUTPUT=filespec
Creates the specified file and directs output to it.
1.2.9 /REMOTE_DEVICE
/REMOTE_DEVICE=(landevicename/IPinterfacename[,...])
Includes specific LAN devices/IP interfaces that identify the
remote end of the channel; you can use wildcards to specify LAN
devices/IP interfaces.
Use the SHOW LAN_DEVICE command to display device names.
1.2.10 /SDA
Includes channel data displayed in SDA format, with all the data
collected in one display for one channel.
1.2.11 /SUMMARY
Includes channel summary data. This is the default if /ALL,
/COUNTERS, and /SDA qualifiers are not specified.
1.3 – Examples
1.SCACP> SHOW CHANNEL NODE20/LOCAL=EWA
The command in this example displays channel definition data
for all nodes defined with local device EWA and any remote
device and remote node name starting with NODE20.
2.SCACP> SHOW CHANNEL/COUNTERS/INTERVAL
SCACP> SPAWN WAIT 0:0:10
SCACP> SHOW CHANNEL/COUNTERS/INTERVAL
The first command in this example displays channel counters
since the last SHOW command. The SPAWN command tells the DCL
WAIT command to insert a 10-second delay. The second SHOW
CHANNEL command displays counters after the 10-second period.
3.SCACP> SHOW CHANNEL/1/3
The command in this example displays the first and third pages
of data for all channels. The first page contains Channel
Summary data, and the third page contains Channel Equivalent
Channel Set (ECS) data.
4.SCACP> SHOW CHANNEL/ALL
The following is a snapshot of the output for SHOW CHANNEL/ALL
command.
Channel Error Data describes the channel error data.
Table 1 Channel Error Data
Data Description
Seq Number of times a sequenced VC packet sent on
Retransmit this channel was retransmitted, and the channel
was penalized for the lost packet.
Note that the sequential retransmit is not
necessarily a reflection of lost packet. It
is possible that there can be a PE which could
have triggered a retransmitted and results in a
duplicate packet to be sent. This is reflected
in the number of duplicate packets received in
the remote node. The XMIT:REXMT ratio is also
a measure of for how many transmitted packet,
a packet was retransmitted. A very low value
(less than 1000) reflects a possible network
congestion.
LAN Transmit Number of times the local LAN device reported
Failures a failure to transmit a packet, and channel was
penalized for the lost packet.
Restart Close or restart because channel control packet
Channel received indicating that the other end closed
the channel and is restarting the channel
handshake.
Channel Init Channel initialization handshake timeout.
Timeouts
Listen No packets of any kind, including HELLOs, were
Timeouts received in LISTEN_TIMEOUT seconds.
Bad Received a Channel Control (CC) packet with a
Authorization bad authorization field.
Msg
Bad ECO CC Received a CC packet with an incompatible NISCA
Msg protocol ECO rev. field value.
Bad Received a bad multicast CC packet.
Multicast
Msg
CC Short Received a CC packet that was short.
Packet
CC Received a CC packet that was incompatible with
Incompatible existing channels for this virtual circuit.
Rcv Old Received a packet from an old instance of a
Channel channel.
No MSCP No MSCP server available to respond to a
Server received channel control solicit service packet
asking this node to boot serve another node.
Disk Not Disk is not served by this system.
Served
Buffer Size Change in buffer size.
Change
5.SCACP> SHOW CHANNEL/ECS
The following is a snapshot of the output for SHOW CHANNEL/ECS
command.
ECS State Channel ECS Membership Information
OpenVMS uses multiple interfaces to communicate with any other
node in order to do load balancing of communication. However,
at a given time not all interfaces that link the remote node
are used to transmit datagrams. OpenVMS maintains a set of
equivalent channels ECS (Equivalent Channel Set) within a VC.
These channels have approximately equivalent transmission
quality at a given time. Only the channels within the ECS
are used to transmit datagrams to the given node. "A" is the
generic format above may be "Y" (Yes) or "N" (No) stating
whether the channel is in the ECS or not. The remaining
characters specify the quality of the channel as they are
derived from the channel performance data. The characters are:
o A: T or L for Tight or Lossy
o B: P, S, I, U for Peer, Superior, Inferior or Ungraded
o C: F or S for Fast or Slow
For more details about ECS, see the section NISCA Transport
Protocol Channel Selection and Congestion Control in the HP
OpenVMS Cluster Systems manual.
NOTE
From OpenVMS Version 8.3 onwards, Topology change column
from SHOW CHANNEL/FULL or /5 has been removed. This is
because you must not consider this as an 'error' instead
it is the count of failovers from one interconnect to the
other interconnect. Whenever failover occurs to another
interconnect the buffer size changes. Hence this topology
change is counted under "Buffer SizeDecr" column in SHOW
VC/FULL output.
You can view the IP channel data summary by using the
/IPCHANNEL qualifier, for example:
$ SHOW CHANNEL <nodename>/IPCHANNEL
You can view the LAN channel data summary by using the
/LANCHANNEL qualifier, for example:
$ SHOW CHANNEL/LANCHANNEL
2 – CIRCUIT
Displays SCA circuit information. You can further qualify each
node name you specify with additional parameters to uniquely
identify a single circuit.
Format
SHOW CIRCUIT nodename
2.1 – Parameter
nodename[,...]
Includes specific circuits to individual nodes, which you can use
wildcards to specify.
2.2 – Qualifiers
2.2.1 /EXCLUDE
/EXCLUDE=(nodename[/PORT=portname[/RSTATION=n]][,...])
Allows you to exclude a specific circuit to a node. If multiple
circuits to the same node exist, you can use the /PORT and
/RSTATION qualifiers to uniquely identify the circuit.
2.2.2 /PORT
/PORT=portname[/RSTATION=n]
If multiple circuits to the same node exist, you can use the
/PORT and /RSTATION qualifiers to uniquely identify the circuit.
You can use the /RSTATION qualifier only in conjunction with the
/PORT qualifier.
2.3 – Example
SCACP>SHOW CIRCUIT
The command in this example displays all circuits to nodes over
port PEA0.
Circuit data for CLUIO2 at 07-DEC 11:55:31.80
Node Port Priority Load Remote Remote
Name Name Cur Mgt Class State Station Type
-------- -------- ---- ---- -------- -------- ------- --------
LYNX03 PEA0 0 0 10 Open dc NI
CLUIO1 PEA0 0 0 10 Open dd NI
PRMMC2 PEA0 0 0 10 Open de NI
RXBOT1 PIB0 5 0 48 Open 4 RF72
RXTOP1 PIB0 5 0 48 Open 1 RF73
RXTOP0 PIB0 5 0 48 Open 0 RF73
CLUIO1 PIB0 5 0 48 Open 7 N710
R4JC3I PIC0 5 0 48 Open 7 RF73
R4HLEK PIC0 5 0 48 Open 5 RF73
R4XEWM PIC0 5 0 48 Open 3 RF73
R4A1FN PIC0 5 0 48 Open 2 RF73
R4XSVE PIC0 5 0 48 Open 4 RF73
R4VLNI PIC0 5 0 48 Open 1 RF73
SCACP>SHOW CIRCUIT* /PORT=PEA0
This SHOW CIRCUIT command displays all circuits to all nodes.
Circuit data for CLUIO2 at 07-DEC 12:42:23.03
Node Port Priority Load Remote_Port
Name Name State Cur Mgt Class Number Type
-------- -------- -------- ---- ---- -------- ------- --------
LYNX03 PEA0 Open 0 0 100 dc NI
CLUIO1 PEA0 Open 0 0 10 dd NI
PRMMC2 PEA0 Open 0 0 10 de NI
3 – IP_INTERFACE
Displays the PEdriver device IP interface data. Each device
is an IP interface on the system, which can be used for NISCA
communications.
Format
SHOW IP_INTERFACE ipinterface
3.1 – Parameter
ipinterfacename[,...]
Includes one of more specific IP interface which you can use
wildcards to specify.
o Use the /EXCLUDE qualifier to exclude IP interfaces.
o Use the SHOW IP_INTERFACE command to display device names.
3.2 – Qualifiers
3.2.1 /ALL
Includes all IP interface data.
3.2.2 /COUNTERS
Includes device counter data maintained by PEdriver and counters.
3.2.3 /EXCLUDE
/EXCLUDE=(IP_INTERFACES[,...])
Excludes specific IP devices, which you can use wildcards to
specify.
3.2.4 /INTERVAL
For the /COUNTERS display, displays the changes to counters since
the last SHOW command.
3.2.5 /n
Displays the nth page. To select a particular page of a multipage
display, specify the number of the page you want to display.
3.2.6 /OUTPUT
/OUTPUT=filespec
Creates the specified file and directs output to it.
3.2.7 /SDA
Includes IP interface data displayed in the SDA format with all
the data collected in one display for an IP interface.
3.2.8 /SUMMARY
Includes IP interface summary data. This is the default if /ALL,
/COUNTERS, and /SDA qualifiers are not specified.
3.3 – Example
SCACP>SHOW IP_INTERFACE/ALL
The following is a snapshot of the output for SHOW IP_
INTERFACE/ALL command.
SCACP>SHOW IP_INTERFACE/COUNTERS
Displays IP interface counters.
IP or LAN Device Error Data describes the IP/LAN device error
data.
Table 2 IP or LAN Device Error Data
Data Description
Bad SCSSYSTEM ID Received a packet with the wrong SCSSYSTEM ID
in it.
MC Msgs Directed Number of multicast packets directed to the
to TR Layer NISCA Transport layer.
Short CC Messages Number of packets received were short to
Received contain a NISCA channel control header.
Short DX Messages Number of packets received were short to
Received contain a NISCA DX header for a LAN device.
CH Allocation Number of times the system failed to allocate
Failures memory for use as a channel structure in
response to a packet received by this LAN
device.
VC Allocation Number of times the system failed to allocate
Failures memory for use as a VC structure in response
to a packet received by this LAN or IP device.
Wrong Port Number of packets addressed to the wrong NISCA
address (Invalid cluster group number).
Port Disabled Number of packets discarded because the LAN or
IP device was disabled.
H/W Transmit Number of local hardware transmit errors.
Errors
Hello Transmit Number of transmit errors during HELLOs.
Errors
Last Transmit Reason for last transmit error.
Error Reason
Time of Last Time of last transmit error:date and time.
Transmit Error
For IP interfaces, the error count can increase for the following
reasons. These errors will be displayed with any of the error
codes.
o The interface is unable to send data (SS$_SUSPENDED)
o Link is disconnected (SS$_LINKDISCON)
4 – LAN_DEVICE
Displays PEdriver device data. Each device is a local LAN device
on the system, which can be used for NISCA communications.
Format
SHOW LAN_DEVICE landevicename
4.1 – Parameter
landevicename[,...]
Includes specific LAN devices, which you can use wildcards to
specify.
Use the /EXCLUDE qualifier to exclude LAN devices.
Use the SHOW LAN_DEVICE command to display device names.
4.2 – Qualifiers
4.2.1 /ALL
Includes all device data.
4.2.2 /COUNTERS
Includes device counters data maintained by PEdriver and counters
data maintained by the LAN drivers.
4.2.3 /EXCLUDE
/EXCLUDE=(landevicename[,...])
Excludes specific LAN devices, which you can use wildcards to
specify.
4.2.4 /INTERVAL
For the /COUNTERS display, displays the changes to counters since
the last SHOW command.
4.2.5 /n
Displays the nth page. To select a particular page of a multipage
display, specify the number of the page you want to display.
4.2.6 /OUTPUT
/OUTPUT=filespec
Creates the specified file and directs output to it.
4.2.7 /SDA
Includes LAN device data displayed in SDA format, with all the
data collected in one display for one LAN device.
4.2.8 /SUMMARY
Includes device summary data. This is the default if /ALL,
/COUNTERS, and /SDA qualifiers are not specified.
4.3 – Example
SCACP> SHOW LAN_DEVICE/COUNTERS
The command in this example displays device counters.
SCACP> SHOW LAN_DEVICE/COUNTERS/INTERVAL
SCACP> SPAWN WAIT 0:0:10
SCACP> SHOW LAN_DEVICE/COUNTERS/INTERVAL
The first command in this example displays device counters
since the last SHOW command. The SPAWN command tells the DCL
WAIT command to insert a 10-second delay. The second SHOW
command displays counters after the 10-second period.
SCACP> SHOW LAN_DEVICE/COUNTERS
The following is a snapshot of the output for SHOW LAN/ALL
command.
For list of all LAN errors, see IP or LAN Device Error Data.
5 – PORT
Displays information about selected SCA ports.
Format
SHOW PORT portname
5.1 – Parameter
portname[,...]
Displays information about specific SCA ports, which you can use
wildcards to specify. If no portname is specified, all ports on
the node are displayed.
5.2 – Qualifiers
5.2.1 /EXCLUDE
/EXCLUDE=(portname[,...])
Excludes specific port names from the display. You cannot use
wildcards to specify port names.
5.2.2 /OUTPUT
/OUTPUT=filespec
Creates the specified file and directs the output of the command
to this file.
5.3 – Example
SCACP> SHOW PORT
The command in this example produces output similar to the
following:
Port data for CLUIO2 at 06-DEC 15:01:25.82
Port Mgt Msgs Msgs Dgrams Dgrams
Name Prio Sent Rcvd Sent Rcvd
------ ---- ---------- ---------- ---------- ----------
PEA0 0 64582 92237 0 0
PIB0 0 95276 148937 0 0
PIA0 0 0 0 0 0
PIC0 0 62030 115148 0 0
6 – TRACE
Displays PEdriver tracing data and parameters.
NOTE
This command is reserved for use by HP Services and OpenVMS
Engineering only. Trace commands and output are subject to
change from release to release.
Format
SHOW TRACE nodename
6.1 – Parameter
nodename[,...]
Includes channels to specific nodes, which you can use wildcards
to specify.
Each node name can be accompanied by optional qualifiers to
specify local and remote device names. If no local or remote
device name is specified, all channels associated with the
specified node are included.
Use the SHOW CHANNEL command to display node names and local and
remote device names.
6.2 – Qualifiers
6.2.1 /CONTEXT
Displays only PEdriver trace settings and the event definition.
If this qualifier is not included, trace event data is displayed.
6.2.2 /EVENT
/EVENT=(event1[,...])
Enables tracing on specific events, which you can use wildcards
to specify. The default is all of the events that are in the
trace buffer.
Use the SHOW TRACE/CONTEXT command to display event names.
6.2.3 /EXCLUDE
/EXCLUDE[=(nodename[,...])
Excludes channels to specific nodes, which you can use wildcards
to specify. Each node name can be accompanied by optional
qualifiers to specify local and remote device names.
If no local or remote device name is specified, all channels
associated with the specified node are included.
6.2.4 /GLOBAL
/GLOBAL (default when no nodes are specified)
/NOGLOBAL (default when nodes are specified)
Specifies whether or not global trace data is to be returned.
6.2.5 /INPUT
/INPUT=filename
Reads trace data from the specified file and displays it.
6.2.6 /LOCAL_DEVICE
/LOCAL_DEVICE=(landevicename[,...])
Includes specific LAN devices that identify the local end of the
channel. You can use wildcards to specify LAN devices.
Use the SHOW LAN_DEVICE command to display device names.
6.2.7 /OUTPUT
/OUTPUT=filename
Creates the specified file and directs output to it. If the
filename extension is .DMP, the trace data is written to a
dump file so that you can use the /INPUT qualifier to display
it later.
6.2.8 /REMOTE_DEVICE
/REMOTE_DEVICE=(landevicename[,...])
Includes specific LAN devices which identify the remote end of
the channel, which you can use wildcards to specify.
Use the SHOW LAN_DEVICE command to display device names.
6.2.9 /SORT
/SORT
/NOSORT (default)
Returns trace data sorted across channels, VCs, and the global
trace buffer by sequence number. The default is trace data
returned for channels and VCs one at a time, in order, for the
channel or VC, but not across channels and VCs.
6.3 – Examples
1.SCACP> SHOW TRACE/CONTEXT
The command in this example displays trace settings and
definition.
2.SCACP> SHOW TRACE/OUTPUT=NODE10.TRC
The command in this example displays trace data and writes it
to the specified file.
An example of the screen output of a SHOW TRACE/CONTEXT command
follows.
SYS999 Trace Context 31-JAN-2001 10:59:28.25:
Trace buffer size requested 2048 bytes
Trace buffer total allocated 92160 bytes
Trace buffer allocations 45 successful
Trace buffer allocations 0 failed
Current trace sequence number 812286047
System cycle counter 404196 cps
Stop tracing 0 events after stop event
Trace Stop Default Event
----- ---- ------- -----
Active Y Error
Active Penalize_ch
Active Timer
Active Listen_timr
Active Handsh_timr
Active Size_probe
Active Delay_msmt
Active Verf_vack
Active Y CC_event
Active Y CC_state
Active Y Path_state
Active Y ECS_state
Active ACK_process
Active Y Chan_update
Active Rcvd_CC_msg
Active Rcvd_TR_msg
Active Send_TR_msg
Active Xmt_failed
Active Y VC_state
Active ACK_timeout
Active Y TMO_listen
Y No_path
Channel Selection:
Local Dev Remote Dev Remote Node Name Selection
--------- ---------- ---------------- ---------
All channels and VCs selected
7 – VC
Displays PEdriver virtual circuit data. Each VC is an SCACP
communications path between the local system and a remote system
comprised of a set of channels.
Use the SHOW CHANNEL or SHOW VC commands to display node names,
which are simply the names of the remote nodes.
Format
SHOW VC nodename
7.1 – Parameter
nodename[,...]
Includes specific nodes, which you can use wildcards to specify.
7.2 – Qualifiers
7.2.1 /ALL
Includes all VC data.
7.2.2 /COUNTERS
Includes VC counter data.
7.2.3 /EXCLUDE
/EXCLUDE=(nodename[,...])
Excludes specific nodes, which you can use wildcards to specify.
Use the SHOW CHANNEL or SHOW VC commands to display VC names,
which are simply the names of the remote nodes.
7.2.4 /INTERVAL
For the /COUNTERS display, displays the changes to counters since
the last SHOW command.
7.2.5 /n
Displays the nth page. To select a particular page of a multipage
display, specify the number of the page you want to display.
7.2.6 /OUTPUT
/OUTPUT=filespec
Creates the specified file and directs output to it.
7.2.7 /SDA
Includes VC data displayed in SDA format.
7.2.8 /SUMMARY
Includes VC summary data. This is the default if /ALL, /COUNTERS,
and /SDA qualifiers are not specified.
7.3 – Examples
1.SCACP> SHOW VC/COUNTERS NODE10
The command in this example displays VC counters for all VCs
whose name (that is, remote node name) starts with NODE10.
2.SCACP> SHOW VC/COUNTERS/INTERVAL
SCACP> SPAWN WAIT 0:0:10
SCACP> SHOW VC/COUNTERS/INTERVAL
The first command in this example displays VC counters since
the last SHOW command. The SPAWN command tells the DCL WAIT
command to insert a 10-second delay. The second SHOW VC command
displays counters after the 10-second period.
7.4 – SPAWN
Creates a subprocess of the current process. The SPAWN command
copies the context of the subprocess from the current process.
Format
SPAWN [command-string]
8 – Parameter
command-string
A string of commands to be executed in the context of the created
subprocess. After the command string is executed, control returns
to SCACP.
9 – Qualifiers
None.
10 – Example
SCACP> SPAWN SHOW TIME
24-AUG-2005 15:22:39
SCACP>
The command in this example creates a subprocess of the current
process and displays the time.