Document revision date: 19 July 1999

The following table lists and describes link counters specific to CSMA/CD only.

Counter	Description
Transmit CDC failure	The total number of carrier detect check errors, that is, the number of times the local node failed to detect that another Ethernet station was already transmitting when the local node began transmitting.
Messages transmitted:	Single collision---The total number of times a frame was successfully transmitted on the second attempt after a normal collision on the first attempt. Multiple collision---The total number of times a frame was successfully transmitted on the third or later attempt after normal collisions on previous attempts. Initially deferred---The total number of times a frame transmission was deferred on its first attempt. This counter is used to measure Ethernet contention with no collisions.

The following table lists and describes link counters specific to FDDI only.

Counter	Description
Ring initializations initiated	The total number of times a ring reinitialization was initiated by the link.
Ring initializations received	The total number of times a ring reinitialization was initiated by some other link.
Directed beacons received	The number of times the link detected the directed beacon process. Each invocation of the directed beacon process is counted only once.
Connections completed	The number of times the station successfully connected to the concentrator.
Duplicate tokens detected	The number of times a duplicate token was detected on the link.
Ring purge errors	The number of times the ring purger received a token while still in the ring purge state.
LCT rejects	Link Confidence Test rejects. Indicates a problem with communication between station and concentrator.
Elasticity buffer errors	Elasticity buffer function errors. Indicates a station on the ring with a transmit clock out of tolerance.
MAC error count	The number of times the Media Access Control (MAC) changed the E indicator in a frame from R to S.
Traces initiated	The number of times the PC-trace process was initiated by the link.
Traces received	The number of times the link was requested to perform the PC-trace process.
Ring beacons initiated	The number of times the ring beacon process was initiated by the link.
Link errors	The number of times the Link Error Monitor (LEM) detected an error in a received message. Slow counts are normal.
Duplicate address test failures	The number of times the link address was a duplicate.
FCI strip errors	The number of times a Frame Content Independent Strip operation was terminated by receipt of a token.
LEM rejects	The number of times excessive LEM errors were encountered.
MAC frame count	The total number of frames (other than tokens) seen by the link.
MAC lost count	The total number of times a frame (other than a token) was improperly terminated.

/FULL

Description

Displays information about the specified link or all links if you do not specify a link. Depending on the qualifier you use with the SHOW LINK command, you can display a link's device name, state, LAT datalink address, DECnet address, or counters.

Examples

LATCP> SHOW LINK/FULL NETWORK_A
      

This command produces the following display of information about link NETWORK_A:

Link Name: NETWORK_A Datalink Address: 08-00-2B-10-12-E3 Device Name: _ESA7: DECnet Address: Disabled Link State: On

The display in this example gives the device name of link NETWORK_A and the device's hardware address. The link is in the On state.

LATCP> SHOW LINK LINK_A/COUNTERS
      

This command produces the following display of counters for link LINK_A:

Link Name: LINK_A Device Name: _ETA6: Seconds Since Zeroed: 65535 Messages Received: 18582254 Messages Sent: 3550507 Multicast Msgs Received: 15096805 Multicast Msgs Sent: 413178 Bytes Received: 1994694325 Bytes Sent: 290838585 Multicast Bytes Received: 1528077909 Multicast Bytes Sent: 32637472 System Buffer Unavailable: 8724 User Buffer Unavailable: 6269 Unrecognized Destination: 0 Data Overrun: 0 Receive Errors - Transmit Errors - Block Check Error: No Excessive Collisions: No Framing Error: No Carrier Check Failure: No Frame Too Long: No Short Circuit: No Frame Status Error: No Open Circuit: No Frame Length Error: Yes Frame Too Long: No Remote Failure To Defer: No Transmit Underrun: No Transmit Failure: No CSMACD Specific Counters ------------------------ Transmit CDC Failure: 0 Messages Transmitted - Single Collision: 43731 Multiple Collisions: 73252 Initially Deferred: 164508

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

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