1 SHOW 2 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 3 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. 3 Qualifiers /ALL Includes all channel data. /COUNTERS Includes channel counters data. /ECS /ECS /NOECS Includes only channels that are (or are not) members of the ECS. /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. /INTERVAL For the /COUNTERS display, displays the changes to counters since the last SHOW command. /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. /n Displays the nth page. To select a particular page of a multipage display, specify the number of the page you want to display. /OUTPUT /OUTPUT=filespec Creates the specified file and directs output to it. /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. /SDA Includes channel data displayed in SDA format, with all the data collected in one display for one channel. /SUMMARY Includes channel summary data. This is the default if /ALL, /COUNTERS, and /SDA qualifiers are not specified. 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 /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 3 Parameter nodename[,...] Includes specific circuits to individual nodes, which you can use wildcards to specify. 3 Qualifiers /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. /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. 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 2 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 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 Qualifiers /ALL Includes all IP interface data. /COUNTERS Includes device counter data maintained by PEdriver and counters. /EXCLUDE /EXCLUDE=(IP_INTERFACES[,...]) Excludes specific IP devices, which you can use wildcards to specify. /INTERVAL For the /COUNTERS display, displays the changes to counters since the last SHOW command. /n Displays the nth page. To select a particular page of a multipage display, specify the number of the page you want to display. /OUTPUT /OUTPUT=filespec Creates the specified file and directs output to it. /SDA Includes IP interface data displayed in the SDA format with all the data collected in one display for an IP interface. /SUMMARY Includes IP interface summary data. This is the default if /ALL, /COUNTERS, and /SDA qualifiers are not specified. 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) 2 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 3 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. 3 Qualifiers /ALL Includes all device data. /COUNTERS Includes device counters data maintained by PEdriver and counters data maintained by the LAN drivers. /EXCLUDE /EXCLUDE=(landevicename[,...]) Excludes specific LAN devices, which you can use wildcards to specify. /INTERVAL For the /COUNTERS display, displays the changes to counters since the last SHOW command. /n Displays the nth page. To select a particular page of a multipage display, specify the number of the page you want to display. /OUTPUT /OUTPUT=filespec Creates the specified file and directs output to it. /SDA Includes LAN device data displayed in SDA format, with all the data collected in one display for one LAN device. /SUMMARY Includes device summary data. This is the default if /ALL, /COUNTERS, and /SDA qualifiers are not specified. 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. 2 PORT Displays information about selected SCA ports. Format SHOW PORT portname 3 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. 3 Qualifiers /EXCLUDE /EXCLUDE=(portname[,...]) Excludes specific port names from the display. You cannot use wildcards to specify port names. /OUTPUT /OUTPUT=filespec Creates the specified file and directs the output of the command to this file. 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 2 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 3 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. 3 Qualifiers /CONTEXT Displays only PEdriver trace settings and the event definition. If this qualifier is not included, trace event data is displayed. /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. /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. /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. /INPUT /INPUT=filename Reads trace data from the specified file and displays it. /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. /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. /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. /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. 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 2 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 3 Parameter nodename[,...] Includes specific nodes, which you can use wildcards to specify. 3 Qualifiers /ALL Includes all VC data. /COUNTERS Includes VC counter data. /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. /INTERVAL For the /COUNTERS display, displays the changes to counters since the last SHOW command. /n Displays the nth page. To select a particular page of a multipage display, specify the number of the page you want to display. /OUTPUT /OUTPUT=filespec Creates the specified file and directs output to it. /SDA Includes VC data displayed in SDA format. /SUMMARY Includes VC summary data. This is the default if /ALL, /COUNTERS, and /SDA qualifiers are not specified. 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. 3 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] 2 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. 2 Qualifiers None. 2 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.