HP OpenVMS Systems Documentation

HP OpenVMS System Management Utilities Reference Manual

Displays the status and LAT characteristics of a node.

Format

SHOW NODE [node-name]

Parameter

node-name

Specifies the name of the node for which information is displayed. If you do not specify a node name, LATCP displays information about the local node.

You can also specify any valid wildcard for this parameter. For example, the SHOW NODE A* command displays the status and characteristics of all nodes that begin with the letter A.

Qualifiers

/ALL

Displays information about all nodes known to your local node. When you use this qualifier, specify the /FULL or /BRIEF qualifier as well. If you do not specify either the /FULL or /BRIEF qualifier, the default display will contain the node status and identification string (the display generated by the /BRIEF qualifier).

/BRIEF

Displays the node status and identification string. This is the default display if you specify the /ALL qualifier.

/COUNTERS

Displays the counters kept for the node. Do not use the /BRIEF or /FULL qualifier with this qualifier. The following table lists and describes the counters displayed with SHOW NODE/COUNTERS:

Counter	Description
Messages received	The total number of LAT messages received by the local node. If you specify a remote node with the SHOW NODE command, the number of LAT messages received from that remote node.
Messages transmitted	The total number of LAT messages transmitted by the local node. If you specify a remote node with the SHOW NODE command, the number of LAT messages transmitted to that remote node.
Slots received	The total number of LAT slots received by the local node. If you specify a remote node with the SHOW NODE command, the number of slots received from that remote node. A slot is a message segment that contains information corresponding to a single session.
Slots transmitted	The total number of LAT slots transmitted by the local node. If you specify a remote node with the SHOW NODE command, the number of slots transmitted to that remote node.
Bytes received	The total number of bytes of LAT information received by the local node. If you specify a remote node with the SHOW NODE command, the number of bytes received from that remote node.
Bytes transmitted	The total number of bytes of LAT information transmitted by the local node. If you specify a remote node with the SHOW NODE command, the number of bytes transmitted to that remote node.
Multicast bytes received	The total number of LAT multicast bytes received by the local node.
Multicast bytes sent	The total number of LAT multicast bytes sent by the local node.
Multicast messages received	The total number of LAT multicast messages received by the local node.
Multicast messages sent	The total number of LAT multicast messages sent by the local node.
No transmit buffer	The total number of times no buffer was available on the local node for transmission.
Multicast messages lost	The total number of times LTDRIVER failed to process an inbound multicast message because of failed communication with the LATACP.
Multicast send failures	The total number of times LTDRIVER failed to send a multicast message because of failed communication with the LATACP.
Controller errors	The total number of times LTDRIVER failed to communicate with the data link controller driver.
Last controller error	The most recent controller error.
Multiple node addresses	The total number of times that a node announced itself with a physical address different from that in a previous announcement.
Duplicates received	The total number of duplicate messages received by the local node. If you specify a remote node with the SHOW NODE command, the number of duplicate messages received from that remote node. This counter can indicate a system slowdown.
Messages retransmitted	The total number of LAT messages that the local node retransmitted because they were not acknowledged by terminal servers (or nodes that support outgoing connections). If you specify a remote node with the SHOW NODE command, the number of messages retransmitted to that remote node.
Illegal messages received	The total number of invalidly formatted LAT messages received by the local node. If you specify a remote node with the SHOW NODE command, the number of invalidly formatted messages the local node received from that remote node. Illegal messages are grouped into several types of protocol errors, which are listed at the end of this table.
Illegal slots received	The total number of invalidly formatted LAT slots received by the local node. If you specify a remote node with the SHOW NODE command, the number of invalidly formatted slots the local node received from that remote node.
Solicitations accepted	The total number of times a remote node accepted solicitations from the local node. If you specify a remote node with the SHOW NODE command, the number of accepted solicitations by that remote node.
Solicitations rejected	The total number of times a remote node rejected solicitation from the local node. If you specify a remote node with the SHOW NODE command, the number of rejected solicitations by that remote node.
Solicitation failures	The total number of times solicitations by the local node received no response.
Transmit errors	The total number of times the data link failed to transmit a LAT message.
Last transmit error	The most recent transmit error.
Virtual circuit timeouts	The total number of times a LAT circuit to another node timed out, indicating that the remote node failed to send a valid message in the required time span. If you specify a remote node with the SHOW NODE command, the number of times the local node timed out from a connection to that remote node.
Discarded output bytes	The total number of data bytes that were discarded because of an overflow of an internal buffer before the data could be output to an LTA device.
User data lost	The total number of times LTDRIVER failed to allocate resources to buffer session data. User data is lost and the session is stopped.
Resource errors	The number of times LTDRIVER was unable to allocate system resources.
Incoming solicits accepted	The total number of times the local node accepted solicitations from other nodes.
Incoming solicits rejected	The total number of times the local node rejected solicitations from other nodes.

The protocol errors that are counted as illegal messages are as follows. These protocol error messages are displayed if their associated counter is greater than zero:

• Invalid message type received
• Invalid start message received
• Invalid sequence number received in start message
• Zero-node index received
• Node circuit index out of range
• Node circuit sequence invalid
• Node circuit index no longer valid
• Circuit was forced to halt
• Invalid server slot index
• Invalid node slot index
• Invalid credit field or too many credits used
• Repeat creation of slot by server
• Repeat disconnection of slot by master

/FULL

Displays the node's status, identification string, LAT protocol version, and the values of the node's characteristics. This is the default except when you specify the /ALL qualifier.

/STATUS

Displays statistical information for parameters such as the number of active circuits, sessions, and incoming queue entries. For each parameter, the display shows the current value, the highest value recorded, and the maximum value allowed.

Note that you can specify the /STATUS qualifier with the SHOW NODE command to display information about the local node only (for example, the command SHOW NODE /STATUS FOREIGN_NODE is not supported).

Description

This command displays information about a specified node or, if you do not specify a node name, about your local node. With the /ALL qualifier, the SHOW NODE command displays information about all nodes known to your local node. Depending on the qualifiers you use, you can display node counters, node status, the node identification string, the LAT protocol version running on the node, and the values set for the node's characteristics.

Examples

LATCP> SHOW NODE/FULL

      

This command produces the following display of information about the local node:

Node Name: LTC LAT Protocol Version: 5.2 Node State: On Node Ident: LTC - Engineering Development Incoming Connections: Enabled Incoming Session Limit: None Outgoing Connections: Enabled Outgoing Session Limit: None Service Responder: Disabled Circuit Timer (msec): 80 Keepalive Timer (sec): 20 Retransmit Limit (msg): 20 Node Limit (nodes): None Multicast Timer (sec): 20 CPU Rating: 8 Maximum Unit Number: 9999 User Groups: 43, 73 Service Groups: 7-9, 13, 23, 40, 43, 45, 66, 72-73, 89, 120-127, 248-255 Service Name Status Rating Identification LTVMS Available 31 D .

This display indicates that the local node LTC is in the On state, which means LAT connections can be created on the node. LTC is running Version 5.2. of the LAT protocol. The identification of the node is "LTC - Engineering Development". Because this is the local node, the display does not give the address of a LAN device. Use the SHOW LINK command to find addresses of devices on the local node. The display for the status of remote nodes, as shown in Example 2, gives the Ethernet address of that node.

Both incoming and outgoing connections can be made on node LTC, the number of sessions is unlimited. The display indicates the values of various timers and lists the groups that are enabled. Users on the local node can access service nodes belonging to user groups 43 and 73. Locally offered services can be accessed by nodes belonging to the service groups listed.

The display indicates that the CPU rating of the local node is 8. The display shows that the node offers a service named LTVMS. This service is available and its rating is 31 D (dynamic). (An S would indicate the rating is static.)

LATCP> SHOW NODE/FULL RWWUP
      

This command displays the following information about the remote node RWWUP:

Node Name: RWWUP LAT Protocol Version: 5.2 Node State: Reachable Address: AA-00-04-00-11-10 Node Ident: . Incoming Connections: Enabled Circuit Timer (msec): 80 Multicast Timer (sec): 20 Service Groups: 7, 13, 42-43, 45, 66, 70-72, 75-82, 88-89 Service Name Status Rating Identification NAC Available 28 . SYSMGR Available 28 .

This display indicates that remote node RWWUP is reachable and runs Version 5.2 of the LAT protocol. The display includes the Ethernet address of node RWWUP. Because incoming connections are enabled, you can connect to a service on node RWWUP, provided that your node belongs to one of the service groups listed in the display.

Node RWWUP offers two services: NAC and SYSMGR. Both are available.

LATCP> SHOW NODE/ALL/BRIEF
      

This command displays the following information about all nodes known to the local node:

Node Name Status Identification ---------------- ----------- ---------------------------------------------- ABLAN Reachable Unauthorized access is prohibited. ASKWEN Reachable . CHUNK Reachable A member of the MAIN VMScluster . . . UTOO On Can be healthy at the Center VULCUN Reachable Beam me up ZENX Reachable ZENX

This command indicates the status (whether a node is reachable) and identification of all nodes known to the local node. The display includes the status of the local node UTOO. The status can be either On, Off, or Shut. Here it is On.

$ LCP :== $LATCP
$ LCP SHOW NODE /STATUS
      

The SHOW NODE /STATUS produces the following display:

Node Name: NODE1 LAT Protocol Version: 5.2 Node State: On Node Ident: Test system Current Highest Maximum ------- ------- ------- Active Circuits: 1 2 1023 Connected Sessions: 1 6 260865 Incoming Queue Entries: 0 0 24 Outgoing Queue Entries: 0 1 32767 Unprocessed Announcements: 0 7 500 Unprocessed Solicits: 0 2 250 Local Services: 1 2 255 Available Services: 188 194 N/A Reachable Nodes: 166 172 N/A Discarded Nodes: 0

Displays the status and LAT characteristics of ports on the local node.

Format

SHOW PORT [port-name]

Parameter

port-name

Specifies the name of the port for which information is displayed. If you do not specify a port name, the SHOW PORT command displays the characteristics for all LTAn: ports on a node.

Do not use the /APPLICATION, /DEDICATED, /FORWARD, /INTERACTIVE, or /LIMITED qualifiers with a specific port name.

Qualifiers

/APPLICATION

Generates a display of all application ports.

/BRIEF

Displays port type, port status, and the remote node name, port, and service associated with the port. This is the default if you do not specify a port name with the SHOW PORT command.

/COUNTERS

Displays the counters kept for the port. Do not use the /BRIEF or /FULL qualifiers with this qualifier.

/DEDICATED

Generates a display of all dedicated ports.

/FORWARD

Generates a display of all LAT ports used for either outgoing LAT connections or local LAT management functions.

/FULL

Displays the following information:

• Port type
• Port status
• Target port name, node name, and service name associated with the port
• Remote node name, port, and service associated with the port if a connection is currently active

/INTERACTIVE

Generates a display of all LAT ports used for incoming interactive connections.

/LIMITED

Generates a display of all limited LTA devices on the system (previously established with the CREATE PORT /LIMITED or SET PORT /LIMITED command).

Description

If a port is an application port, the display lists the remote node name, remote port name, and remote service name that you specified in the SET PORT command.

If the port is a dedicated port, the display lists the service name that you specified in the SET PORT command.

If LATCP shows the port as Interactive in the display, a user on a terminal server or on a node that supports outgoing LAT connections is currently using the port.

For all ports with active sessions, the remote node sends its node name and port name to your local node. These names are listed in the display.

Examples

LATCP> SHOW PORT /FULL
      

This command produces the following type of display. The display reflects the characteristics set by the command examples given with the SET PORT command.

Local Port Name: _LTA16: Local Port Type: Forward Local Port State: Inactive Connected Link: Target Port Name: Actual Port Name: Target Node Name: LATCP$MGMT_PORT Actual Node Name: Target Service Name: Actual Service Name: -------------------------------------------------------------------------------- Local Port Name: _LTA17: Local Port Type: Interactive Local Port State: Active Connected Link: LAT$LINK Target Port Name: Actual Port Name: PORT_1 Target Node Name: Actual Node Name: MY_DS200_SERVER Target Service Name: Actual Service Name: -------------------------------------------------------------------------------- Local Port Name: _LTA19: Local Port Type: Application (Queued) Local Port State: Active Connected Link: LAT$LINK Target Port Name: Actual Port Name: Target Node Name: TLAT1 Actual Node Name: TLAT1 Target Service Name: PRINTER Actual Service Name: PRINTER -------------------------------------------------------------------------------- Local Port Name: _LTA21: Local Port Type: Dedicated Local Port State: Inactive Connected Link: Target Port Name: Actual Port Name: Target Node Name: Actual Node Name: Target Service Name: GRAPHICS Actual Service Name: -------------------------------------------------------------------------------- Local Port Name: _LTA22: Local Port Type: Application (Queued) Local Port State: Active Connected Link: LAT$LINK Target Port Name: LN02 Actual Port Name: LN02 Target Node Name: TS33EW Actual Node Name: TS33EW Target Service Name: Actual Service Name: --------------------------------------------------------------------------------

The display in this example shows information about all the ports on the local node. The display shows information for each of the four types of ports:

• Forward: a port used for outgoing LAT connections or for executing local management functions and LATCP commands. Port LTA16: is a forward port. The display shows that the port is currently inactive---no current LAT connection exists. The target node name of LATCP$MGMT_PORT indicates that LATCP is using this port to execute the LATCP commands entered by the user. If the display listed a node and service name, it would mean that the port is being used for an outgoing connection.
• Interactive: a port created as a result of an incoming LAT connection request from another node or terminal server. Port LTA17: is an interactive port connected with port PORT_1 on the terminal server MY_DS200_SERVER.
• Application: a port used for solicited connections to devices on terminal servers or to application services on remote LAT service nodes. Port LTA22: is an application port. The port maps to port LN02 (a printer) on a terminal server node TS33EW. The display indicates that server TS33EW queues connection requests from the local node. Port LTA19: is also an application port. The port maps to the service PRINTER on terminal server TLAT1.
• Dedicated: a port dedicated to a local application service. Port LTA21: is dedicated to the service GRAPHICS.

The target port name, target node name, and target service name are the names specified with the SET PORT command. They are passed to the remote node or terminal server when the connection request is made.

The actual port name, actual node name, and actual service name are the names returned by the remote node when it accepts the connection request. They may differ from the corresponding target names (specified with the SET PORT command) if the remote node translates the names. For example, terminal servers that accept connections to LAT service names usually return the name of the port to which the connection was actually directed.

LATCP> SHOW PORT LTA1 /COUNTERS
      

This command produces a display that lists counter information for the LTA1 device:

Port Name: _LTA1: Seconds Since Zeroed: 66 Remote Accesses: 0 Framing Errors: 0 Local Accesses: 0 Parity Errors: 0 Bytes Transmitted: 0 Data Overruns: 0 Bytes Received: 0 Password Failures: 0 Solicitations Accepted: 1 Solicitations Rejected: 1 Incoming Solicits Accepted: 0 Incoming Solicits Rejected: 0 Last disconnect reason code: 18 (%LAT-F-LRJDELETED, queue entry deleted by server)