AMXIL

8/13/2019 AMXIL

1/25

SCANMNT

OPERATING / MAINTENANCE SHEET

E10B SCANMNT

FUNCTION : STATIONS AND TERMINATION UNITS

SUB-FUNCTION : PERFORMING MAINTENANCE ON RINGSMIS AND MAS

1 PURPOSE

SCANMNT explains how to perform maintenance work on MIS and MAS multiplex rings.

Throughout this sheet,

"Ring coupler" or "token ring coupler" are used to mean:- in an SMB:

theAATRAapplique (an AATRA applique is shared by two Token Rings),- in a SCH:

the RCAJxboard (one RCAJx board for each Token Ring)

- in configurations other than SMBs or SCHs: the ACAJxboard (one ACAJx board for each Token Ring)

"Distribution frame" is used to mean:- in an SMB:

theAATCUapplique (one AATCU applique connects up to 16 SMBs on a Token Ring and anALAN1 lead connects an AATRA to the AATCU of a ring)

- in an SCH: theRAAJxapplique (the RAAJx applique is opposite the RCAJx board)

- in configurations other than SMBs or SCHs: theAAISM board on the backplane (the AAISM board is opposite the ACAJx board)

Similarly, when a "control station" or "main control station" is mentioned, it means an SMC orSMB depending on the configuration in question.

2 WHEN TO USE SCANMNT ?

Use SCANMNT when events described in the table below occur. If several of the alarms described arepresent, give priority to the "MIS/MAS RING OS" alarm.

Given.... refer to...

the "MIS/MAS RING OS" alarm sections3 then 4 then 5

3BW32988ACAXREAHA Ed. 03 1 / 25
http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

2/25

SCANMNT

Use also SCANMNT to carry out the tasks described in the table below. You should first refer tochapter 3 "Warning".

If you want to... refer to...

check out ring operation section5.4

repair a ring : the "MIS/MAS RING DIAG" alarm section 6.1

repair a ring : the "SM - FAIL WITH DIAG" with"ADAPTER OS" diagnosis

section 6.2

repair a ring : the "SM - FAIL WITH COMPLEXDIAG" with "PDIA=26" diagnosis

section 6.3

repair a ring : the "SM - FAIL WITH COMPLEX

DIAG" with "PDIA=28" diagnosis

section 6.4

repair a ring : the "FAULTY UNIT" alarmwith AMX=x

section 6.5

repair a ring : an intermittent alarm (see notebelow)

section 6.5

Note : An intermittent failure is revealed by repeated ring data display requests using theAMXIL command with the option DBG=HF to observe the CPTBEA counters (seeFOP AMXIL). A ring has an intermittent fault if:

- the ring is down but becomes operational again without any repair work having been carried outon it (the CPTBEA counter is incremented),

- the phenomenon occurs several times in a week, or month.

3 WARNING

CAUTION: For any work on the "distribution frames" or the cablesof a ring:

- It is important to accurately identify the "distribution frame" or cable that is to beworked on.

- Do not remove "distribution frames" or cables from unpopulated stations. This as-sembly contributes to the operation of the rings.

CAUTION: If the procedure requires you to change a board:

2 / 25 3BW32988ACAXREAHA Ed.03
http://-/?-http://-/?-

8/13/2019 AMXIL

3/25

SCANMNT

- Look up the precautions to be taken when replacing a board (see operator guide:C orrective maintenance management MCGOP).

- Check to see whether there are any special precautions to be taken for the type ofboard to be replaced (see FEX SCCARTES).

CAUTION: If the procedure requires you to set a ring to BLOM:

- If a station reload occurs (BLO -> ES), you must reset the ring to BLOM.

4 QUICK REFERENCE GUIDE

The procedure outlined below applies when the "MIS/MAS RING OS" alarm is generated. Other casesare dealt with in section 6 "Repairing a ring".

The ring maintenance procedure comprises the steps described below. It should be car-ried out from start to finish, unless the end of procedure is explicitly stated:

Start "MIS/MAS RING OS" alarm present

Step 1 Check the state of the ring

Display ring status information. For details, see section 5.1.

Step 2 Trace the origin of the fault

Test the ring and analyse the test results. For details, see section 5.2.

Step 3 Repair

Analysis of the test results will normally lead to one of the following procedures:

- repair procedure associated with the "MIS/MAS RING DIAG" alarm. For details, see section 6.1

- repair procedure associated with the "ADAPTER OS" diagnostic report. For details, see section 6.2.

Step 4 Check out operation of the ring

Display ring status information after resetting the fault counters. For details, see section5.4.

End

5 DETAILED GUIDEThe detailed description concerns only the "MIS/MAS RING OS" alarm. Other cases are dealt with insection 6 "Repairing a ring".

You should refer to:

- the section of the Corrective maintenance management operator guide MCGOP which deals withMIS and MAS multiplexes.

- appendix A, which describes some ring maintenance-specific points, in particular how to set a ringto the BLOM state.

-appendices B and C, which explain how to analyse responses to the AMXIL command with the

option DBG=HF.


8/13/2019 AMXIL

4/25

SCANMNT

The procedures described in this document do not describe individual actions in detail. These individ-ual actions are described in the following FEXs:

If you want to know how to... refer to FEX...

shut down a station SCSMNT

run a station LOCAVAR test SCSMNT

put a station into service SCSMNT

perform an SMM switchover SMMMAINT

run an SMM LOCAVAR test SMMMAINT

5.1 Step 1: check the state of the ringThe "MIS/MAS RING OS" alarm is generated when one of the rings fails. The ring specified by thealarm message is denoted x.

To check the state of the ring:

a) Display SM status information using theESMINcommand (see FOP ESMIN). Note the geographicaddresses (AGEO) of the SMs on the ring.

b) Display ring status information using the AMXILcommand with the option DBG=HFand AMX=x(see FOP AMXIL). The ETAPHY field gives the physical state of the ring.

c) Check the ETAPHY value:

if... then...

ETAPHY=BEAC the fault is ongoing. Continue with the procedure

ETAPHY has a value other than BEAC the fault is intermittent. Go on to section6.5"Repairing a ring (FAULTY UNIT alarm)"

d) End of step 1.

5.2 Step 2: Trace the origin of the faultTo trace the origin of a fault:

a) Set the ring to the BLOM state using the AMXMOcommand with AMX=x(see FOP AMXMO-01).

b) Set the ring to test mode using the AMXMO command with AMX=x and STATE=TEST (see FOPAMXMO-01).

c) Wait for the end of the test. The test is finished when the ring switches to the BLOM state. Toascertain this, repeatedly display ring status information using theAMXIL command with the optionDBG=HF and AMX=x (see FOP AMXIL). To calculate the duration of the test, assuming that n is

the number of stations in the ES state connected to the ring:

http://-/?-http://-/?-

8/13/2019 AMXIL

5/25

SCANMNT

if the BEACON CONTEXT output then the test will take at most...

contains at least one "FRAME..." type line n minutes

contains no "FRAME..." type line 2 * n minutes

d) Depending on the result of the test:

if the alarm... then...

"MIS/MAS RING DIAG" appears go on to section 6.1 "Repairing a ring(MIS/MAS RING DIAG alarm)"

"MIS/MAS RING DIAG" does not appear the response to the last AMXIL command willshow that there is a station with its adapter in

the DIAG state (STT.=DIAG). Continue with theprocedure

e) If the station with the adapter in the DIAG state is an SMM, shut down the standby SMM using theSETSCHcommand, with SCHSTATE=BLOM(see FOP SETSCH).

f) Put the ring into service using theAMXMO command, withAMX=x and STATE=ES (see FOP AMXMO-01).

g) For ten minutes or so, repeatedly display ring status information using the AMXILcommand, withthe option DBG=HFand AMX=x(see FOP AMXIL). The ETAPHY field gives the ring status:

if all ring status display commands give the result ETAPHY=OPER.

If the SM with the adapter in the DIAGstate...

then...

is an SMM go on to section 6.2 "Repairing a ring(ADAPTER OS diagnostic report)"

is not an SMM a) wait for the station to be taken out of serviceautomatically. The "SM - FAIL WITH DIAG" alarm,with additional information "ADAPTER OS" ap-pears.

NOTE If the system is running in degradedmode, it may not permit the station to be takenout of service. In this case, clear the cause of thedegraded operating state.

b) go on to section 6.2 "Repairing a ring(ADAPTER OS diagnostic report)"

if a ring status display command gives the result ETAPHY=BEAC, the fault is on the stationsupporting the GA and not on the station specified (for details on stations supporting GA andthe ring manager, refer to the Corrective maintenance management operator guide MCGOP).

Proceed as described below:

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

6/25

SCANMNT

a) set the station that is wrongly indicated as potentially faulty to the ES state. Use eitherSETSCHfor an SMM (see FOP SETSCH) or ESMMOfor any other type of station (seeFOP ESMMO).

b) set the ring to the BLOM state using theAMXMOcommand (see FOP AMXMO-01).

c) proceed as described in section 6.1.2 "Identifying the station supporting GA".

d) depending on the nature of the ring:

if the fault concerns a MIS ring, go on to section 6.1.4 "Tracinga fault onthe station supporting GA: MIS case",

if the fault concerns a MAS ring,go on to section6.1.5 "Tracinga fault ona station supporting GA: MAS case".

h) End of step 2.

5.3 Step 3: Repairing the faulty ring

The repair procedure to apply depends on the results of the ring test (see section 5.2 "Tracing the originof the fault"). The repair procedures are dealt with in section 6 "Repairing a ring".

5.4 Step 4: Checking out ring operation

The procedure described below must be carried out after the following operations:

- replacing a "ring coupler",

- replacing a "distribution frame",

- replacing a cable,

- any extension operation affecting a ring.

Note : The procedure must be carried out onceand thenrepeated 24 hours later.

To check out operation of the ring:

a) Display ring status information using the AMXIL command with the option DBG=HF (see FOPAMXIL). The indication STT.=DINS indicates that the station whose address is given in the AM fieldis not inserted on the ring. The STT. field does not appear if the station is inserted.

b) Following the status display, check that:

the logical status of the ring is STT.=ES,

the physical status of the ring is ETAPHY=OPER, all the stations are inserted on the ring.

c) If a station is not inserted on the ring, try to insert it as follows:

1) shut down the station (see FEX SCSMNT),

2) put the station into service (see FEX SCSMNT).

3) display the ring status again using theAMXILcommand with the optionDBG=HF(see FOPAMXIL) to check that all the stations are inserted.

d) Set all fault counters to zero using theAMXSVcommand (see FOP AMXSV).

e) Wait six minutes.

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

7/25

SCANMNT

f) Display the ring status information again using the AMXIL command with the option DBG=HF(see FOP AMXIL).

g) Check that:

the logical status of the ring is STT.=ES,

the physical status of the ring is ETAPHY=OPER, the fault counters are still at zero (if no SM has been set to BLOS or BLOM).

h) End of step 4.

6 REPAIRING A RING

6.1 Repairing a ring ("MIS/MAS RING DIAG" alarm)

If two stations are indicated, in additional information accompanying the alarm message, the fault ison the section between the two stations. If just one is indicated, the fault is on the section from thestation indicated to the preceding station on the ring.If no station is indicated, the fault is not localized,the control have to be made on the whole ring.

To check the rings "distribution frames":

a) Check ring continuity (see6.1.1 ),

b) Identify the station supporting GA (see 6.1.2 ),

c) Look for a fault on the "distribution frames" but not on that of the station supporting GA, (section6.1.3 ),

d) Look for a fault on the "ring couplers" of the station supporting GA and on their "distribution frames".The search procedure differs depending on whether it is a MIS ring (section6.1.4 ) or a MAS ring(section6.1.5 ).

6.1.1 Checking ring continuity

Ring continuity must be checked if the response to the ring status information display command satis-fies one of the following conditions:

- the BEACON CONTEXT field contains NEXT FRAME with TYBEAT=2,

- the BEACON CONTEXT field contains only INITIAL FRAME with TYBEAT=4.

- the BEACON CONTEXT field is empty.

To check ring continuity:

a) Identify the section involved from the additional information accompanying the alarm message(Without any additional information the whole ring can be affected),

b) Check the connections of the cables of this section (cables latched on the "distribution frames" and,for SMB configurations, the "ALAN1" cables latched between the "distribution frame" and the "ringcouplers"),

c) Wait three minutes for the end of the "MIS/MAS RING DIAG" alarm,

d) If the alarm has disappeared:

1) put the ring into service using the AMXMO command with AMX=x and STATE=ES (see FOP

AMXMO-01),

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

8/25

SCANMNT

2) go on to section5.4 "Checkingout ring operation".

e) If the alarm is still present,go on to section 6.1.2 .

f) End.

6.1.2 Identifying the station supporting GA

To identify the station supporting GA:

a) Display station status information using the ESMINcommand (see FOP ESMIN).

b) Make a note of the station supporting GA:

if the ring belongs to a multiplex of type... then the station supporting GA is...

MIS the worker SMM

MAS the main SM supporting the ML MQ that is ES

If there are two main SMs supporting the ML MQand they are ES:- the main SM supporting ML MQ1 controls

MASx1 and MASx3- the main SM supporting ML MQ2 controls

MASx2 and possibly MASx4

a) Go on to section6.1.3 .

b) End.

6.1.3 Finding a fault on the "distribution frames" but not on those of the station

supporting GA

To find a fault on the rings "distribution frames":

a) Note the identity of the "distribution frames" to be checked and the order in which the search forfaults must be carried out:

The "distribution frame" connected to the station supporting GA is not checked,

All the "distribution frames" connected to the other stations are checked,

The check applies primarily to the "distribution frames" of the stations specified in the alarmmessages additional information.

If the fault is on a multiplex that has "collective distribution frames" (SMBs), begin with them.

b) For each "distribution frame" identified:

1) Accurately identify the position of the "distribution frame" of ring x (see AppendixA.2 ).

2) Replace the "distribution frame" if it has not already been replaced,

3) Wait three minutes for the end of the "ANNEAU MIS/MAS DIAG" alarm.

4) If the alarm persists, go to the next "distribution frame",

5) If the alarm disappears, continue the procedure.

c) If, during a "distribution frame" check, the alarm has disappeared:

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

9/25

SCANMNT

1) put the ring into service using the AMXMO command with AMX=x and STATE=ES (see FOPAMXMO-01).

2) wait for the end of the "MIS/MAS RING OS" alarm.


d) If the alarm persists after you have checked all the stations except the station supporting GA: if the fault concerns a MIS ring, go on to section 6.1.4 "Tracing a fault on the station

supporting GA: MIS case",

if the fault concerns a MAS ring, go on to section 6.1.5 "Tracing a fault on the stationsupporting GA: MAS case".

e) End.

6.1.4 Tracing a fault on the station supporting GA: MIS case

To trace a fault on the station supporting GA (worker SMM):

a) Check that the worker SMM is not handling the active monitor function for the peer ring:1) determine which station is handling the active monitor function for the peer ring (denoted

y) using the AMXILcommand with the option DBG=HFandAMX=y(see FOP AMXIL). TheSMAMPR field indicates which station is handling this function.

2) if the worker SMM is handling the active monitor function for the peer ring, call secondlevel maintenance.

b) Disconnect one of the cables of failed ring x.

c) Carry out the procedures below to initiate an SMM switchover without the SMM that becomes thestandby SMM being reinitialised:

1) raise switches I1 on the ACCSG boards (manual startup),2) initiate the SMM switchover using the CTIBSCcommand (see FOP CTIBSC),

3) wait for the RTOS system to finish initializing and the WAM application to finish loading,

4) shut down the standby subsystem using the SETSCH command with SCHSTATE=BLOM (seeFOP SETSCH),

5) specify startup option NORON,

6) lower switches I1 on the ACCSG boards.

d) Wait for the "MIS/MAS RING OS" alarm to appear. The alarm appears 6+n minutes after themessage "SYSTEM READY" (n being the number of the ring: 1 for MIS A, 2 for MIS B, etc).

e) On the SMM that has become the standbySMM:


2) Replace the "distribution frame".

3) Replace the "ring coupler".

f) Reconnect the cable previously disconnected.

g) Wait no longer than three minutes for the end of the "MIS/MAS RING OS" alarm.

h) If the alarm persists, call second level maintenance.

i) If the alarm has disappeared:

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

10/25

SCANMNT

1) display ring status information using the AMXILcommand with AMX=x(see FOP AMXIL).

2) check that the STT. field indicates STT.=ES. If not, call second level maintenance.

3) run a LOCAVAR test on the standby SMM (see FEX SMMMAINT).

4) if a diagnostic report is output, refer to FEX SMMMAINT and repair as appropriate.

5) initiate an SMM switchover using the CTIBSCcommand (see FOP CTIBSC).

6) wait three minutes after the "SYSTEM READY" message appears.

7) display ring status information using the AMXIL command with AMX=x (see FOP AMXIL).STT.=DINS indicates that the station whose address is indicated in the AM field is not insertedon the ring. The STT. field does not appear if the station is inserted.

If... then...

all the stations are

inserted

go on to section5.4 "Checkingout ring oper-

ation"

all the stations are not inserted call second level maintenance

Note :N.B.In this case, the "MIS/MAS RING OS"alarm appears after 6+n minutes (n = thenumber of the ring)

j) End.

6.1.5 Tracing a fault on the station supporting GA: MAS case

To find a fault on the main SM supporting GA:

a) Check that this main SM is not supporting the active monitor function of the counterpart ring:

1) determine which station is handling the active monitor function for the peer ring (denotedy) using the AMXILcommand with the option DBG=HFandAMX=y(see FOP AMXIL). TheSMAMPR field indicates which station is providing this function.

2) If the main SM supports the active monitor function of the counterpart ring, call secondlevel maintenance.

b) Carry out the following procedures on the station supporting GA:

1) shut down the station (see FEX SCSMNT).


3) Replace the "distribution frame" if it has not already been replaced (this is for AATCUs thatallow the connection of several SMBs).


c) Wait a maximum of three minutes for the end of the "MIS/MAS RING DIAG" alarm.

d) If the alarm persists, call second level maintenance.

e) If the alarm has disappeared:

1) display ring status information using the AMXIL command with the option DBG=HF and

AMX=x(see FOP AMXIL). The ETAPHY field gives the state of the ring.

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

11/25

SCANMNT

2) check that the ETAPHY field indicates ETAPHY=OPER. If not, deal with the alarm that appearsa few minutes later.

3) run a LOCAVAR test on the SMC (see FEX SCSMNT).

4) depending on the result of the test:

if... then...

there is no fault continue with the procedure

diagnostic reportPDIA=26 is output

go on to section 6.3 "Repairing a ring (diag-nostic report PDIA=26)"

diagnostic reportPDIA=28 is output

goon to section 6.4 "Repairing a ring (diag-nostic report PDIA=28)"

another diagnosticreport is output

a) refer to FEX SCSMNT and repair

b) continue with the procedure


6) wait for the end of the "MIS/MAS RINGOS" alarm.

7) put the station supporting GA into service (see FEX SCSMNT).


f) End.

6.2 Repairing a ring ("ADAPTER OS" diagnostic re-port)

A station is indicated as potentially faulty in the additional information accompanying the alarm mes-sage (AM=s).

To repair the station on which a distribution frame is indicated:

a) The ring concerned is denoted x. You can identify it using the AMXIL command with AM=s andSTATE=DIAG (see FOP AMXIL).

b) If the station indicated is the standby SMM and it is not in the BLOM state, shut down the standbySMM using the SETSCHcommand with SCHSTATE=BLOM(see FOP SETSCH).

c) Set the ring to the BLOM state using theAMXMOcommand with AMX=x(see FOP AMXMO-01). The"MIS/MAS RING OS" alarm appears.

d) On the station indicated:


2) Replace the "distribution frame" and, for an SMB, if the problem persists, check the "ALAN1"cable linking the "distribution frame" to the "ring coupler".

e) Check that the ring is operational as follows:


8/13/2019 AMXIL

12/25

SCANMNT

1) wait one minute,

2) display ring status information using the AMXIL command with the option DBG=HF andAMX=x (see FOP AMXIL),


f) If the station is not an SMM, shut down the station (see FEX SCSMNT).

g) Run a LOCAVAR test on the station. For an SMM, see FEX SMMMAINT. For a station that is not anSMM, see FEX SCSMNT.

h) If a diagnostic report is output in the test result, refer to the appropriate FEX and repair: for an SMM, see FEX SMMMAINT, for a station that is not an SMM, see FEX SCSMNT.

i) If the fault persists,call second level maintenance.

j) If the fault has disappeared:

1) put the ring into service using the AMXMO command with AMX=x and STATE=ES (see FOPAMXMO-01),

2) wait for the end of the "MIS/MAS RING OS" alarm,

3) put the station into service (if the station is an SMM, see FEX SMMMAINT, otherwise see FEXSCSMNT),


k) End.

6.3 Repairing a ring ("PDIA=26" diagnostic report)

One or more stations have been removed from service and the "PDIA=26" diagnostic report is out-put. A "ring coupler" is indicated on each of these stations.

To clear the "SM - FAIL WITH COMPLEX DIAG" alarm accompanied by diagnostic report "PDIA=26":

a) For each station concerned, replace the indicated "ring coupler" and, if necessary, if the indicatedstation is an SMB, check the "ALAN1" cable linking the "ring coupler" to the "distribution frame":


2) replace the indicated "ring coupler" (see FEX SCCARTES) and, for an SMB, check the "ALAN1"cable linking the "ring coupler" to the "distribution frame",

3) run a LOCAVAR test on the station (see FEX SCSMNT), and depending on the result of the

test:

if... then...

the fault persists continue with the procedure

the fault hasdisappeared

a) put the stations that have been shut down backinto service (see FEX SCSMNT)

b) go on to section 5.4 "Checking out ringoperation"

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

13/25

SCANMNT

b) Shut down the ring concerned:

1) determine which ring has the fault using the AMXIL command with the option DBG=HF(see FOP AMXIL). The ring with the fault is the one with the CPTBEA counter abnormallyincremented. This ring is denoted x. Check that ring x is associated with the "ring couplers"indicated (see Appendix A.3).

2) set the ring to the BLOM state using the AMXMO command (see FOP AMXMO-01). The"MIS/MAS RING OS" alarm appears.

c) For each station concerned:

1) run a LOCAVAR test on the station (see FEX SCSMNT),


if... then...

the diagnostic report indicates the ACAJx or

RCAJx board (PDIA=26 or PDIA=28)

a) accurately identify the position of the

"distribution frame" of ring x(see AppendixA.2 )

b) replace the "distribution frame".

there is a diagnostic report other than PDIA=26orPDIA=28

refer to FEX SCSMNT and repair

there is no diagnostic report go on to the next station

d) if the fault persists, call second level maintenance.

e) if the fault has disappeared:



3) put the stations previously shut down back into service (see FEX SCSMNT),


f) End.

6.4 Repairing a ring ("PDIA=28" diagnostic report)To clear the "SM - FAIL WITH COMPLEX DIAG" alarm accompanied by diagnostic report "PDIA=28":

a) Replace the "ring coupler" indicated and, if the "ring coupler" is on an SMB, check the "ALAN1"cable linking the "ring coupler" to the "distribution frame":


2) replace the "ring coupler" indicated (see FEX SCCARTES) and, if necessary, check the "ALAN1"cable if the "ring coupler" is on an SMB,

3) run a LOCAVAR test on the station (see FEX SCSMNT),



8/13/2019 AMXIL

14/25

SCANMNT

if... then...

the fault persists continue with the procedure

the fault has

disappeared

a) put the station into service (see FEX SCSMNT)

b) go on to section 5.4 "Checking out ringoperation"

b) Replace the "distribution frame" for the "ring coupler":

1) determine which ring corresponds to the board indicated (see Appendix A.3). This ring isdenoted x.

2) set the ring to the BLOM state using the AMXMO command (see FOP AMXMO-01). The"MIS/MAS RING OS" alarm appears.

3) Accurately identify the position of the "distribution frame" of ring x (see Appendix

A.2 ).4) Replace the "distribution frame".

c) Check that the ring is operational as follows:

1) wait one minute,

2) display ring status information using the AMXIL command with the option DBG=HF (seeFOP AMXIL),


d) Run a LOCAVAR test on the station (see FEX SCSMNT).

e) If a diagnostic report is output in the test result, refer to FEX SCSMNT and repair.

f) If the fault persists, call second level maintenance.

g) If the fault has disappeared:



3) put the station into service (see FEX SCSMNT),


h) End.

6.5 Repairing a ring ("FAULTY UNIT" alarm)

The "FAULTY UNIT" alarm appears when a ring has an intermittent fault. The ring indicated as poten-tially faulty is denoted x.

To repair a ring with an intermittent fault:

a) Check to see whether there are alarms concerning the stations. If there are any alarms of this type:

1) refer to FEX SCSMNT and repair,

2) wait 4 minutes,

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

15/25

SCANMNT

3) check to see whether the alarm is still present. If it has disappeared, the procedure isfinished.

b) Display ring status information using the AMXILcommand with the option DBG=HFand AMX=x(see FOP AMXIL). Refer to Appendices B and C for how to interpret the response to the AMXILcommand. Based on the status information displayed:

1) check that the physical status of the ring is ETAPHY=OPER. If not, deal with the alarm thatappears a few minutes later.

2) determine and note the order in which the stations are arranged on the ring.

3) identify which section of the ring and which stations are affected. The tables below canbe used to trace the fault. When there are a number of possibilities they are explained indescending order of probability (the first possibility is the most probable).

If CPTBEA... then...

is greater than zero observe the failure context ("BEACON CON-TEXT"). The table below explains how to interpretthis context.

is equal to zero the fault is in the station indicated by the SM-COUR field for which the BURSTE or LOSTFRcounters have readings significantly higher thanthe observed average. This station will normallybe the station generating the error message out-put in the alarm messages additional informa-tion. The fault may be:

- on the station indicated by the SMCOURfield

- on the station preceding the station speci-fied by the SMCOUR field

- on the section linking the station specifiedby SMCOUR to the station specified by SM-PREC

Note : When the fault counter (CPTBEA) is at zero, the information specifying thefailure context (BEACON CONTEXT) is meaningless.

If "BEACON CONTEXT"... then the fault is...

contains "NEXT FRAME" with "TYBEAT=2" on the section bounded by the stations specifiedby SMBEAT and SMBPRE


8/13/2019 AMXIL

16/25

SCANMNT

contains "NEXT FRAME" with "TYBEAT=3"

and does not contain "NEXT FRAME" with "TY-BEAT=2"

- - on the "ring coupler" of the station identifiedby SMBPRE

- - on the "ring coupler" of the station identifiedby SMBEAT

- - on the "ring coupler" of one of the stationson the section identified by SMBEAT-SMBPRE- - on the section identified by SM-

BEAT-SMBPRE

contains "INITIAL FRAME" with "TYBEAT=4"

and does not contain "NEXT FRAME"

- - on the "ring coupler" of the station preced-ing the one identified by SMBEAT

- - on the section linking the station identifiedby SMBEAT to the one preceding it

c) Check the section identified:

1) Check the cable connections of the identified section (locking the cables on the "distributionframes" and in the inter-rack connection). Begin with the first station in the section and thenuse the SMPREC field output in response to the AMXIL command to work towards the laststation in the section.

2) wait 4 minutes.

3) check to see whether the alarm is still present. If the alarm has disappeared, go on tosection5.4 "Checkingout ring operation".

d) Trace the fault on the identified stations. For each of these stations:

1) shut down the station:

if the station is not an SMM, proceed according to FEX SCSMNT, if the station is an SMM:

a) if the SMM is the worker, first initiate an SMM switchover (see FEX SMMMAINT).

Note : The SMM switchover will cause all the alarms to disappear.

b) shut down the standby SMM using the SETSCH command withSCHSTATE=BLOM (see FOP SETSCH).

2) run a LOCAVAR test on the station. For an SMM, see FEX SMMMAINT. For any other type ofstation, see FEX SCSMNT.

3) if a diagnostic report is output in the LOCAVAR test result:

1) refer to the appropriate FEX and repair: for an SMM, see FEX SMMMAINT, for a station that is not an SMM, see FEX SCSMNT.

2) wait 4 minutes.

3) check to see whether the alarm is still present. If the alarm has disappeared, go on tosection5.4 "Checkingout ring operation".

4) if there is no diagnostic report or if the fault persists, go on to the next station.

e) If the above checks do not locate the fault, all the "ring couplers" and "distribution frames" of theidentified section are suspect. First replace the "ring couplers" (and, for an SMB, also check the"ALAN1" cable linking the "ring coupler" to the "distribution frame"), one station at a time, beginning

with the one that is most likely to be the source of the fault. For each station in the section:

http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-http://-/?-

8/13/2019 AMXIL

17/25

SCANMNT

1) shut down the station: if the station is not an SMM, proceed as described in FEX SCSMNT, if the station is an SMM:

a) if the SMM is the worker, first initiate an SMM switchover (see FEX SMMMAINT).

Note : The SMM switchover will cause all the alarms to disappear.

b) shut down the standby SMM using the SETSCH command withSCHSTATE=BLOM (see FOP SETSCH).


3) run a LOCAVAR test on the station to check the validity of the change of board. For an SMM,see FEX SMMMAINT. For another type of station, see FEX SCSMNT.

4) wait 4 minutes.

5) check to see whether the alarm is still present.

6) put the station into service. For an SMM, see FEX SMMMAINT. For any other type of station,see FEX SCSMNT.

7) if the alarm has disappeared, go on to section5.4 "Checkingout ring operation".

8) if the fault persists, go on to the next station.

f) Replace the "distribution frames" of the section:

1) set the ring to the BLOM state using theAMXMO command withAMX=x (see FOP AMXMO-01).The "MIS/MAS RING OS" alarm appears.

2) for each station on the section:

a) Accurately identify the position of the "distribution frame" of ring x (seeAppendixA.2 ).

b) Replace the "distribution frame".

3) check that the ring is operational as follows:

a) wait one minute,

b) display ring status information using the AMXIL command with the optionDBG=HF and AMX=x (see FOP AMXIL),

c) check that the ETAPHY field indicates ETAPHY=OPER. If not, deal with the alarm thatappears a few minutes later.


5) wait 4 minutes after the end of the "MIS/MAS RING OS" alarm.

6) check to see whether the alarm is still present. If the alarm has disappeared, go on tosection 5.4 "Checking out ring operation".

g) If the fault persists after replacing all the "ring couplers" and "distribution frames" in the section,call second level maintenance.

h) End.

7 RELATED DOCUMENTS

SEE:


8/13/2019 AMXIL

18/25

SCANMNT

- Operator sheets: AMXIL, AMXMO-01, AMXSV, CTIBSC, ESMIN, ESMMO, SETSCH

- Operating/maintenance sheets: SCCARTES, SCSMNT, SMMMAINT

- Operator guide: Corrective maintenance management MCGOP


8/13/2019 AMXIL

19/25

SCANMNT

APPENDIX A : MULTIPLEX RINGS: SPECIAL FEA-TURES

A.1 Setting a ring to the BLOM stateBefore carrying out any work on a ring, it must be set to the BLOM state using the AMXMOcommand(see FOP AMXMO-01). When a ring is set to the BLOM state, the stations that are in service are alertedand then use the other ring to exchange messages. However, a station that is out of service when thering is set to the BLOM state will not be alerted. So, when this station is set to the ES state, the AMXMOcommand must be run again with STATE=BLOM. Similarly, the ring must be set to BLOM again afteran SMM switchover.

A.2 Layout of ring connection boards

For SCH stations, the RAAJx appliques used to connect the stations to the rings are positioned asindicated in the rear viewof the backplane below.

Figure 1 : Rear view of an SCH backplane

For SMs other than those in SMB or SCH configurations, the AAISM boards for connecting the stationsto the rings are positioned as shown in the backplane rear viewbelow.

Figure 2 : Rear view of an SM backplane

For SMB configurations, the "distribution frames" (AATCU appliques) can support up to 16 SMBs.All the cables for connection to the rings are labelled; the AMXIL command can also be used to identifythe "distribution frame" (see FOP AMXIL).For a ring, the AMXIL command identifies:- the SMBs connected to that ring (AM=SMBn) and their states (ETAT=...),- for each of these SMBs, AMXIL identifies:

the reference of the SMB supporting the AATCU that is the "distribution frame" of the stationson the ring (AMH=SMBx),

the geographic address of the AATCU (AGEO=Sxx-Txx-Bxx-Axx-Rxx).


8/13/2019 AMXIL

20/25

SCANMNT

A.3 Identifying the ring corresponding to a "ringcoupler"

To identify the ring corresponding to an ACAJX or RCAJx board of a station at address am:

a) Use the AMXILcommand with AM=am(see FOP AMXIL).

The AMX field indicates the multiplexes to which the station is connected.

If the response indicates... then...

just one multiplex The "ring coupler" corresponds to ring x of thatmultiplex

several multiplexes (SMC) identify the ring using:- the information on the arrangement of the

ring connection boards (see Appendix A.2 )and the labelled identifications on the cables,

- the geographic address of the board

End.

http://-/?-http://-/?-

8/13/2019 AMXIL

21/25

SCANMNT

APPENDIX B : TYPICAL RESPONSE TO THE AMXILCOMMAND@AMXIL,DBG=HF:

CEN=1/97-08-25/10 H 32 MN 15/LIST RING CHARACTERISTICS

@AMX=MISA;PROCESS TMAMX0 ACC

AMX=MISA ,STT.=ES ,DAMX=04

/ETAPHY=OPER

/BEACON CONTEXT : /SMBEAT/TYBEAT/SMPBRE/SMAMPR=SMC3

INITIAL FRAME / SMC1 / 4 /*****

NEXT FRAME 1 / SMC3 / 3 / SMC2

NEXT FRAME 2 / SMC3 / 2 / SMC2

/COUNTERS : /CPTBEA/CPTCLM/MONERR/MONDUP/ADRDUP/POLLFL/

/ 1 / 2 / 0 / 0 / 0 / 0 /

AM = SMMA

AM = SMMB

AM = SMC1AM = SMC2

AM = SMC3

AM = SMC4

AM = SMC5

/SMCOUR/SMPREC/LINERR/BURSTE/ARIFCI/LOSTFR/RECCON/FRACOP/TOKERR/

/SMMA /SMC5 / 0 / 0 / 0 / 0 / 0 / 0 / 0 /

/SMMB /SMMA / 0 / 0 / 0 / 0 / 0 / 0 / 0 /

/SMC1 /SMMB / 0 / 0 / 0 / 0 / 0 / 0 / 0 /

/SMC2 /SMC1 / 0 / 0 / 0 / 0 / 0 / 0 / 0 /

/SMC3 /SMC2 / 3 / 12 / 0 / 0 / 0 / 0 / 12 /

/SMC4 /SMC3 / 0 / 1 / 0 / 0 / 0 / 0 / 0 /

/SMC5 /SMC4 / 0 / 0 / 0 / 0 / 0 / 0 / 0 /

PROCESS TMAMX0 EXC

On a token ring, information flows in just one direction. The columns of the SMCOUR field (currentSM) and SMPREC field (previous SM) can be used to determine the direction. It is then easy to workout the order of the stations on the ring.

If the operational state of the ring is too degraded for this order to be worked out, refer to the ordergiven by the peer ring.

In the example above, the ring is made up as follows:

By convention, a section SMx-SMy indicates station SMx and all those that precede it as far as SMy. Inthe example:

- SMC4-SMC3 corresponds to stations SMC4 and SMC3

- SMC3-SMC4 corresponds to stations SMC3, SMC2, SMC1, SMMB, SMMA, SMC5 and SMC4


8/13/2019 AMXIL

22/25

SCANMNT

In the example above, the last failure (Beacon) seen on the ring is located on section SMC3-SMC2.The ring is currently operational (ETAPHY=OPER).

The SMAMPR field identifies the station handling the active monitor function (SMC3 in the exampleabove). This station serves a particular synchronization function on the token ring.

Note : - for the counters that log ring-related events to provide usable information, you must:

1) reset the counters using the AMXSVcommand (see FOP AMXSV),

2) observe the trend of the counter readings using the AMXIL command with theoption DBG=HF (see FOP AMXIL).

- each time a station is inserted on or removed from a ring, LINERR, BURSTE andLOSTFR faults are caused for the stations located downline from the point of inser-tion. The TOKERR counter is incremented with each change of ring configuration.This is why you will observe that the fault counters for all the stations located downlinefrom the standby SMC are incremented daily. These faults are caused by shutdownsof this SMC in routine LOCAVAR tests.


8/13/2019 AMXIL

23/25

SCANMNT

APPENDIX C : MNEMONICS OUTPUT IN RESPONSETO THE AMXIL COMMAND (,DBG=HF)

The AMXIL command lists the ring characteristics (see FOP AMXIL). The option DBG=HF supple-

ments the "operator" output with second level "manufacturer" output identified by the "/" character.AMX= The ring concerned (MISA, MISB, MASAi, MASBi).

STT.= The state of the ring:

NEQ : not equipped

ES : in service

BLOM : unavailable (set by the operator)

TEST : under test (set by the operator)

BLOS : out of service (ongoing failure)

AMH= SMB supporting the AATCUAGCA= Geographic address of the AATCU

/ETAPHY= Physical state of the ring:

OPER : operational

RGPU : in purge mode (requested by the active monitor, transient state)

CLMT : token request (electing the station supporting the active monitorfunction)

BEAC: hardware fault (beacon state)

WOPE : transitional state, lasting less than 7.5 seconds, during which thering manager looks for the station supporting the active monitor function.

When the physical state is not ETAPHY=BEAC, the failure context (BEACONCONTEXT) displayed corresponds to the last fault detected by the ring man-ager (GA). This context will be used to locate any temporary faults.

When the physical state is ETAPHY=OPER, only an SMM switchover will clearthe context of the last failure observed (BEACON CONTEXT).

/BEACON CONTEXT Failure context (hardware).

In all failure situations (Beacon), the fault is located between stations SMj andSMk identified by NEXT FRAME 1 and NEXT FRAME 2. The TYBEAT counter

gives an idea of the nature of the fault.

Normally, NEXT FRAME 1 and NEXT FRAME 2 do not have the same valueas TYBEAT.

INITIAL FRAME cannot be used to trace the fault when NEXT FRAME 1 orNEXT FRAME 2 is output.

/SMBEAT SM issuing the Beacon

INITIAL FRAME : SM generating the fault

NEXT FRAME 1 and 2 : SM generating the max severity indication.

/TYBEAT List of failure types:


8/13/2019 AMXIL

24/25

SCANMNT

2: loss of signal (triggers the election of a new station to support the activemonitor function)

-> clear break in the ring (faulty cable, etc)

3 : failure to elect a station supporting the active monitor function (framelost)

-> less clear failure attributable to the ACAJx orRCAJx board normally belonging to the station in-dicated by the SMPBRE field and, more rarely, tothe station indicated by the SMBEAT field

4 : failure to elect a station to support the active monitor function (framereceived)

/SMPBRE SM receiving the indication of a fault (Beacon). Normally, this is the SMupstream from the SM generating the fault indication.

/SMAMPR SM supporting the active monitor function.

/COUNTERS Counters recording events occurring since the last time the ring was ini-tialised or the last backup by the AMXSVcommand.

/CPTBEA Number of failures (Beacon counter).

/CPTCLM Number of token requests (number of times a station supporting the activemonitor function is elected).

/SMCOUR Current SM. The station indicated by this field and the station indicated bythe SMPREC field delimit a section of the ring.

/SMPREC Previous SM.

The following counters are fault counters:

/MONERR Active monitor function fault detected by a standby monitor.

/MONDUP The same ring has more than one station supporting the active monitorfunction.

/ADRDUP Two adapters have the same address on the same ring (fault detected duringthe election of a station to support the active monitor function).

/POLLFL Loss of AMP frame sent periodically (at 7.5 s intervals) by the active monitorfunction to tell the other adapters (standby monitors) that it is operating (AMP= active monitor present).

/LINERR Transmission error revealed by the correcting codes (differential Manchester

code).

/BURSTE No transition on the line signal for longer than five half bit intervals.

/ARIFCI An "active monitor present" or "standby monitor present" frame addressed toan adapter has not been recognised or copied by that adapter. This fault isdetected by the next adapter.

/LOSTFR An adapter sending a frame has not received the echo of that frame.

/RECCON An adapter has detected a frame addressed to it but has no more bufferspace available to copy it (receive mode congestion).

/FRACOP A frame addressed to a specified adapter has already been taken by another.


8/13/2019 AMXIL

25/25

SCANMNT

/TOKERR The token circulating is lost or has an invalid format. This error is detectedonly by the station supporting the active monitor function.

Date post:	04-Jun-2018
Category:	Documents
Upload:	ksu2006
View:	216 times
Download:	0 times

AMXIL

Documents