The SDLC (SDLC) ports

[15:43:20] ABILIS_CPX: D P PO:321

PO:321 ------------------------------------------------------------------------
SDLC   lowpo:NONE  TYPE:USER     MCAU:NO   ps:2048   pvc:0     bsvc:0
       role:SEC    MAXOUT:7      T1:3000   T2:3000   T5:0      N2:7

[15:43:20] ABILIS_CPX: D P PO:321

PO:321 ------------------------------------------------------------------------
SDLC   lowpo:NONE  TYPE:USER     MCAU:NO   ps:2048   pvc:0     bsvc:2
       role:SEC    MAXOUT:7      T1:3000   T2:3000   T5:0      N2:7
       PU:0   add:01   PROT:QLLC  n1:2100  GEN:YES    SLOWPOLL:15   LOG:DS
              AC:NO    RTY:INC    TB:6     NRTY:NOMAX               

       PU:1   add:02   PROT:QLLC  n1:2100  GEN:YES    SLOWPOLL:15   LOG:NO
              AC:NO    RTY:INC    TB:6     NRTY:NOMAX

[15:43:20] ABILIS_CPX: D P PO:321

PO:321 ------------------------------------------------------------------------
SDLC   lowpo:NONE  TYPE:USER     MCAU:NO   ps:2048   pvc:0     bsvc:2
       role:PRI    MAXOUT:7      T1:3000   T2:3000   T5:0      N2:7
       QTINFO:*
       PU:0   add:01   PROT:QLLC  n1:2100  GEN:YES    SLOWPOLL:15   LOG:DS
              AC:NO    RTY:INC    TB:6     NRTY:NOMAX               QTCHK:NO
              QXID:TR

       PU:1   add:02   PROT:QLLC  n1:2100  GEN:YES    SLOWPOLL:15   LOG:NO
              AC:NO    RTY:INC    TB:6     NRTY:NOMAX               QTCHK:NO
              QXID:TR

It sets the Abilis CPX lower level port. It can only be a SYNC or PLINKE. port.

Value "NONE" isolates the SDLC port from the lower level ones.

This parameter is used for setting how the port has to behave if data compression is active.

The port connected to the X.25 network is defined NETWORK port; the one connected to the user equipment USER port.

The NETWORK port sends compressed data and expands the received ones; the USER port compresses the received data and sends the expanded ones.

A configuration error of this parameter will cause the virtual channel to be teared down as soon as data are transmitted. If the user equipment detects the error, it will generate the X25 diagnostic code, while if the Abilis CPX will detect the error, it will tear down the virtual channel using the diagnostic codes F0,C2 (Expansion error) or F0,C3 (Compressed data format not valid) or F0,AA (Compression protocol not compatible).

If MCAU is set to NO, Abilis CPX transports, without any changes, the cause and diagnostic code of the CLEAR packets; it also uses the F0 cause code and the suitable diagnostic one for all the CLEAR packets internally generated.

If MCAU is set to YES, Abilis CPX forces the cause code of the CLEAR packet sent to the value 00 (DTE originated), either for the external CLEAR and the internal ones.

The changes made on this parameter are immediately activated, without the need of initialisation commands.

It sets the maximum size (bytes) of packets to be sent or received.

It sets the number of PVC connections.

It sets the number of BSVC connections.

It sets the port role: Master or Slave.

Value	Meaning
PRI	The Master port controls the connection establishment and polls all the PU configured
SEC	The slave port can only send data after being polled by a SDLC station

It sets the maximum number of frames to be sent without receiving their acknowledgement.

This value is common to all the PU configured.

It sets the longest time interval for waiting a polling response in NRM mode (Normal Response Mode).

This parameter is meaningful only for Master ports, therefore when the parameter ROLE: is set to "PRI".

It sets the longest time interval for waiting a polling response in NDM mode (Normal Disconnect Mode).

This parameter is meaningful only for Master ports, therefore when the parameter ROLE: is set to "PRI".

It sets the time interval between sending a polling frame and its successive ones.

This parameter is meaningful only for Master ports, therefore when the parameter ROLE: is set to "PRI".

It sets the maximum number of consecutive retransmission of the same frame.

It sets the informative string accepted in the QLLC TEST frames. The value "*" (asterisk) stands for "any string", allowing to accept QLLC TEST frames with any value of the informative strings.

This parameter is meaningful only for Master ports, therefore when the parameter ROLE: is set to "PRI".

Detail of the parameter of the Physical Units SDLC

It sets the identifier of the PU SDLC.

It sets the address of the PU SDLC.

The value "0x00" is used to disable the PU, in this way it is not activated by the SDLC port.

It sets the conversion protocol type to apply.

It sets the maximum length of the SDLC frame (Flags and CRC not included).

It enables the generation of DISC/QDICS or DM/QDM frames.

If the parameter is set to "NO", the driver never generates this kind of frame, but it is only received from outside and managed.

It sets the waiting interval between a connection attempt and its successive one.

This parameter is used by the auto-connection procedure only if the parameter AC: is set to "TEST" or "XID" or "SDLC" or "POLL".

Usually this parameter makes possible to activate/deactivate logging functionalities of meaningful events of the port as well as the detection and signalling of alarms in case of critical events.

The following table shows the available options and the related functionalities usable by the parameter:

Option	Meaning
D	Recording of the driver state changes and/or the meaningful events in Debug Log
S	Recording of the driver state changes and/or the meaningful events in the System Log
A	Periodic detection of possible alarms. The detected alarms can be displayed the command ALARM VIEW or by the analogous command available on the UTILITY of the LCD display on the front panel
L	On alarm detection, acoustic signal generation plus a message on the LCD display. This function depends on activation of alarms detection by the "A" option
T	Generation by the Agent SNMP of Abilis CPX of SNMP traps corresponding to any change of the driver state and/or occurring of meaningful events

Beside the already described options the following values are also allowed:

Option	Meaning
NO	It means that all the logging functionalities, alarms detection and generation, above mentioned, are disabled.
ALL	It means that all the logging functionalities, alarms detection and generation, above mentioned, are enabled.
+E	This option added to one or more of the previous ones, extends its (their) set of meaningful events. The value "ALL+E" activates all the options and extends the set of meaningful events. The value "NO+E" is meaningless so it is ignored.

Options can be combined together.

Some examples:

• setting "LOG:DS+E", activates the extended logging functions for Events Log and System Log
• setting "LOG:STA", activates the extended logging functions for System Log, SNMP traps generation and periodic detection of alarm states;

By using the characters "+" and "-" as prefix of one or more options is possible to add or delete one or more functionalities without setting from the scratch the value of the parameters.

Some examples:

• Suppose the current value of the parameter is "LOG:DSTA", by setting "LOG:-A", the periodic detection of eventual alarm states is removed, leaving unchanged all the remaining options; in such way the final value of the parameter will be "LOG:DST";
• Suppose the current value of the parameter is "LOG:ST", by setting "LOG:+DA", the logging function of the events on the Events Log and the periodic alarm detection are added to the already activated options; in such way the final value of the parameter will be "LOG:DSTA".

The changes made on this parameter are immediately activated, without the need of initialization commands.

It selects the auto-connection mode.

Value	Meaning
NO	No auto-connection procedure is applied
DCD	This auto-connection procedure automatically generates a called whenever the driver leaves the "DOWN" state and reaches the "UP" one. If the call is unsuccessful the port will repeat the call as many times as the value of the parameter RTY:.
TEST XID SNRM POLL	The "autoconnection" procedure is applied as in the "DCD" case, however there are some differences, depending on the port role: - Master: before call generation an unnumbered frame specified (TEST or XID or SNRM or POLL) is sent. If no the acknowledgement frame is not received within the time interval specified in the parameter T2:, the port will wait until the time interval, specified in the parameter SLOWPOLL:, elapses and then start again the procedure. - Slave: before call generation the port has to receive an unnumbered specified frame (TEST or XID or SNRM or POLL).

It allows to select the calls repetition mode.

Value	Meaning
LIN	The time interval to wait, between a call attempt and the successive one, is fixed and configurable through the parameter TB:
INC	The time interval to wait, between a call attempt and the successive one, is doubled at every attempt starting from the value defined in the parameter TB:

It defines the smallest time interval to be waited between a call attempt and its successive one.

It specifies the maximum number of call repetitions:

Value	Description
0	No call is made
NOMAX	Calls are repeated indefinitely
1 - 65534	Calls are repeated as many times as the configured value

It activates the control function of the QLLC TEST frames.

This parameter is meaningful only for Master ports, therefore when the parameter ROLE: is set to "PRI".

It sets a sequence of hexadecimal characters to send in the QLLC XID.

• If the parameter is set to "TR"...

• If the parameter contains a sequence of hexadecimal characters, it will be set in the XID frame sent.

This parameter is meaningful only for Master ports, therefore when the parameter ROLE: is set to "PRI".

[15:43:20] ABILIS_CPX: D S PO:322 .

PO:322 ------------------------------------------------------------------------
SDLC   STATE:N/A
       ------------------------- SDLC PU diagnostics --------------------------
       Pu0 Pu1 Pu2 Pu3 Pu4 Pu5 Pu6 Pu7 Pu8 Pu9 Pu10 Pu11 Pu12 Pu13 Pu14 Pu15
        00  00  00  00  00  00  00  00  00  00   00   00   00   00   00   00
         F   F   F   F   F   F   F   F   F   F    F    F    F    F    F    F
       ------------------------------------------------------------------------
       (QLLC: 0=Down; 1=Ready; 2,3,5=Connected; 7=Calling; 8=Delay; 9=Stopped)
       (PU  : 2=Disconnected(NDM); 3=Connecting; 5=Connected(NRM); F=N/A)
       -----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
       T3-EXP     |           |0          |UNK-ADD    |0          |           |
       SHORT      |0          |0          |
       ------------------------------------------------------------------------

[15:43:20] ABILIS_CPX: D SE PO:321 .

PO:321 ------------------------------------------------------------------------
SDLC   --- Cleared 004:22:08:51 ago, at 21/05/1999 11:36:46 -------------------
       Pu:0     Add:01                    LAST-UNN-FRAMES IN:00  OUT:00
       -----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
       UNK-FRM    |0          |0          |T2-EXP     |0          |           |
       T1-EXP     |           |0          |N2-OVR     |           |0          |
       REP        |0          |0          |INFO       |0          |0          |
       CHAR       |0          |0          |RR         |0          |0          |
       RNR        |0          |0          |REJ        |0          |0          |
       FRMR       |0          |0          |SNRM       |0          |0          |
       UA         |0          |0          |DISC       |0          |0          |
       RD         |0          |0          |DM         |0          |0          |
       TEST       |0          |0          |XID        |0          |0          |
       ------------------------------------------------------------------------  
       Pu:1     Add:02                    LAST-UNN-FRAMES IN:00  OUT:00
       -----------|---INPUT---|--OUTPUT---|-----------|---INPUT---|--OUTPUT---|
       UNK-FRM    |0          |0          |T2-EXP     |0          |           |
       T1-EXP     |           |0          |N2-OVR     |           |0          |
       REP        |0          |0          |INFO       |0          |0          |
       CHAR       |0          |0          |RR         |0          |0          |
       RNR        |0          |0          |REJ        |0          |0          |
       FRMR       |0          |0          |SNRM       |0          |0          |
       UA         |0          |0          |DISC       |0          |0          |
       RD         |0          |0          |DM         |0          |0          |
       TEST       |0          |0          |XID        |0          |0          |
       ------------------------------------------------------------------------

The SDLC port state is not available, that's why the value "N/A" will be always shown.

The counter "T3" is incremented every time the "T3" polling timeout, expected for Slave stations in case of NRM, runs over.

The counter UNK-ADD is incremented every time a frame, whose address is unknown, is received.

The counter SHORT (INPUT) is incremented every time the SDLC driver receives too short frames. The counter SHORT (OUTPUT) is incremented every time the SDLC driver receives, from the upper level, frames too short.

Identifier of the PU SDLC.

Address of the PU SDLC.

The value "0x00" is used to disable the PU. A PU is active only if its address is not 0x00.

It shows the numeric value correspondent to the current state of the Physical Unit:

Driver	States	Meaning	Values shown in:
			System Log	Debug Log	Display LCD
SDLC (Physical Unit)	0	The QLLC is in the DOWN state, it cannot receive or make calls	dn	dn
	1	The QLLC is in the READY state, it can receive or make calls
	2	The QLLC is in the CONNECTED state, the PU in the DISCONNECTED one (Normal Disconnect Mode)
	3	The QLLC is in the CONNECTED state, the PU in the CONNECTING one
	7	The QLLC is in the CALLING state
	8	The QLLC is in the DELAY state, it can receive calls
	9	The QLLC is in the STOPPED state, it can receive calls	st	st
	5	The QLLC is in the CONNECTED state, the PU in the CONNECTED one	CN	CN
	F	It identifies a not active, not available PU	NA	NA

Identifier of the Physical Unit SDLC.

Address of the Physical Unit SDLC.

The value "0x00" is used to disable the PU. A PU is active only if its address is not 0x00.

The field LAST-UNN-FRAMES IN shows the content of the control field of the last unnumbered frame received, while the LAST-UNN-FRAMES OUT shows the one of the last unnumbered frame sent.

The counter UNK-FRM is incremented every time a frame, whit address unknown, is received.

The counter T2-EXP (INPUT) is incremented every time the timeout, configured in the parameter T2:, run over.

The counter T1-EXP (INPUT) is incremented every time the timeout, configured in the parameter T1:, run over.

The counter N2-OVR (OUTPUT) is incremented every time the maximum number of retransmission, set in the parameter N2:, is reached.

The counter REP (INPUT) is incremented every time the Abilis CPX receives a repeated frame, while the counter REP (OUTPUT) every time a sent frame is repeated.

The counter INFO (INPUT) is incremented every time an INFO frame is received. The counter INFO (OUTPUT) is incremented every time an INFO frame is sent.

The counter INFO (INPUT) is incremented every time an INFO frame is received. The counter INFO (OUTPUT) is incremented every time an INFO frame is sent.

The counter RR (INPUT) is incremented every time a RR frame is received, while the counter RR (OUTPUT) every time a RR frame is sent.

The counter RNR (INPUT) is incremented every time a RNR frame is received, while the counter RNR (OUTPUT) every time a RNR frame is sent.

The counter REJ (INPUT) is incremented every time a REJ frame is received, while the counter REJ (OUTPUT) every time a REJ frame is sent.

The counter FRMR (INPUT) is incremented every time Abilis CPX receives a FRMR frame, while the counter FRMR (OUTPUT) every time a FRMR frame is sent.

The counter SNRM (INPUT) is incremented every a SNRM frame is received, while the counter SNRM (OUTPUT) every time a SNRM frame is sent.

The counter UA (INPUT) is incremented every time a UA frame is received, while the counter UA (OUTPUT) every time a UA frame is sent.

The counter DISC (INPUT) is incremented every time a DISC frame is received, while the counter DISC (OUTPUT) every time a DISC frame is sent.

The counter RD (INPUT) is incremented every time a RD frame is received, while the counter RD (OUTPUT) every time a RD frame is sent.

The counter DM (INPUT) is incremented every time a DM frame is received, while the counter DM (OUTPUT) every time a DM frame is sent.

The counter TEST (INPUT) is incremented every time a TEST frame is received, while the counter TEST (OUTPUT) every time a TEST frame is sent.

The counter XID (INPUT) is incremented every time a XID frame is received, while the counter XID (OUTPUT) every time a XID frame is sent.

This variable stores the CPX port number, which the SNMP trap refers to.

This variable shows either the port type which the trap refers to (in this case SDLC) and the description eventually associated to it.

PU identifier of the SDLC port which the trap refers to.

PU address of the SDLC port which the trap refers to.

This variable shows the current state of Physical Unit SDLC which the trap refers to. The following table shows the relationship among the state value stored in the SNMP variable and the ones obtained executing the command D S.

Value of the SNMP variable	Correspondent state of the PU SDLC
qllcDown(0)	0
qllcReday(1)	1
qllcConnected-PuDisconnected(2)	2
qllcConnected-PuConnecting(3)	3
qllcConnected-PuConnectedNRM(5)	5
qllcCalling(7)	7
qllcDelay(8)	8
qllcStopped(9)	9
not-available(15)	F

This variable stores the elapsed time (in cent of second) from the system start to the SNMP trap event occurrence.

This value is usually shown by the format days:hours:minutes:seconds.