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Conference azur::mcc

Title:DECmcc user notes file. Does not replace IPMT.
Notice:Use IPMT for problems. Newsletter location in note 6187
Moderator:TAEC::BEROUD
Created:Mon Aug 21 1989
Last Modified:Wed Jun 04 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:6497
Total number of notes:27359

1500.0. "Ethernet_AM probelm with concentrator 500" by EISNCG::MEHR () Fri Sep 13 1991 00:24

	 When I try to show a concentrators STATUS  or Counter, MCC
	either crash (both Command line & the MAP)  or it goes to lunch
	and never comes back!!
	Error:	SYSTEM-F-ACCVIO, access violation , reason amsk=00,
	Virtual address=00000001, PC=0041B6CD, PSL=03C00004
	
	Improperly handled condition, image exit forced.
	(PC values are different at different times!)


	I have applied the Ethernet  patch in note 1267.
	MCC> show Ethernet_AM componenet version
	
		Component Version = V1.1.1


	What is wrong?
	
Thanks
T.RTitleUserPersonal
Name
DateLines
1500.1Ouch...CHRISB::BRIENENDECmcc Bridge|Station|SNMP Management.Fri Sep 13 1991 10:4926
Just a quick sanity check.

Please:

 1. Reply to this note with the actual FCL commands issued (they're
    something like SHOW STATION <addr>, right ? ).

 2. Please enter the version number of firmware running on the
    DECconcentrator (use the "MAKO" CONCENTRATOR_AM or DECelms to get
    this information). 

 3. a. $define mcc_enet_am_log 22
    b. issue an offending station command
    c. post resulting file mcc_enet_am.log here.
       ($define mcc_enet_am_log 26 will send packet dumps to screen)

Fwiw, Ethernet AM was tested with anything we could get our hands on at
the time. Most problems we're encountering involve firmware released
after we completed testing...

						Chris

P.S. We're getting a DECconcentrator delivered
     here this afternoon (for CONC_AM testing).
     We'll be testing V1.2 Ethernet AM against it
     for sure...
1500.2Reproduce-able in LKGDELNI::R_PAQUETFri Sep 13 1991 11:58154
    
	Chris,
    
    	Note that this only blows up on show counters and status.  Show
    	all other partitions works fine.
    
LKG3> mana/enter
DECmcc (V1.1.0)

MCC> show station ray_test all char
STATION ACTMCC:.ray_test 
AT 13-SEP-1991 10:19:19 Characteristics

Examination of attributes shows:

                    Functions Supported = DEC_IEEE802
                  Data Link Buffer Size = 1492
                    Maintenance Version = V4.0.0
                         Implementation = DECconcentrator-500/DEFCN wiring 
					  concentrator FDDI comm link
                              LLC Class = ClassI
                               LLC Type = Type1

MCC> show station ray_test all status
%SYSTEM-F-ACCVIO, access violation, reason mask=00, virtual address=00000001, 
PC=004528CD, PSL=03C00004
%SYSTEM-E-ACCVIO, access violation, reason mask=00, virtual address=0000000A, 
PC=0000000A, PSL=0000000F
LKG3> 
LKG3>  mana/enter

DECmcc (V1.1.0)


MCC> show station ray_test all ident

STATION ACTMCC:.ray_test 
AT 13-SEP-1991 10:19:50 Identifiers

Examination of attributes shows:

                                   Name = ACTMCC:.ray_test
                                Address = 08-00-2B-13-DB-67
MCC> 
MCC> show station ray_test all counters
%SYSTEM-F-ACCVIO, access violation, reason mask=00, virtual address=00000001, 
PC=004528CD, PSL=03C00004

  Improperly handled condition, image exit forced.

	Signal arguments	      Stack contents

	Number = 00000005		 7FEBEFF4
	Name   = 0000000C		 00000000
		 00000000		 7FEBFB04
		 00000001		 00000004
		 004528CD		 132B0008
		 03C00004		 000067DB
					 00000000
					 00000000
					 00000209
					 00000000

	Register dump

	R0 = 03268009  R1 = 7FEBEE6C  R2 = 00000004  R3 = 7FEBFB04
	R4 = 7FEBEFF4  R5 = 00000000  R6 = 7FEBFB04  R7 = 0016791C
	R8 = 03268009  R9 = 00155658  R10= 03268009  R11= 03268009
	AP = 7FEBEF98  FP = 7FEBEF58  SP = 7FEBEFD4  PC = 004528CD
	PSL= 03C00004

    
MCC> show concen lkg_act_conc2 all attr

CONCENTRATOR ACTMCC:.lkg_act_conc2 

AT 13-SEP-1991 10:29:55 All Attributes


	 		    	Address = 08-00-2B-13-DB-67
                                   Name = ACTMCC:.lkg_act_conc2
                   Device Broken Reason = None
                   Device Configuration = ( (  FRU Type = Mother Board,
					      FRU State = Working,
					         FRU ID = N/A,
					   FRU Revision = Revision 0 ),
					   (   FRU Type = ANSI Management 
							  Board,
					      FRU State = Working,
					         FRU ID = Slot 1,
					   FRU Revision = Revision 0 ),
					   (   FRU Type = 4 Port ANSI 
							  Board,
					      FRU State = Working,
					         FRU ID = Slot 2,
					   FRU Revision = Revision 0 ),
					   (   FRU Type = NULL,
					      FRU State = Empty,
					         FRU ID = Slot 3,
					   FRU Revision = Revision 0 ),
					   (   FRU Type = Fan,
					      FRU State = Working,
					         FRU ID = N/A,
					   FRU Revision = Revision 0 ),
					   (   FRU Type = Fan,
					      FRU State = Working,
					         FRU ID = N/A,
					   FRU Revision = Revision 0 ) )

                           Device State = Operating
                      NVRAM Failed Flag = False
                  Counter Creation Time = 29-AUG-1991 13:18:13.78
                      Invalid Passwords = 0
                      Management Resets = 0
                               Powerups = 0
                      Seconds Operating = 1285903 Seconds
                     Unsolicited Resets = 0
                       Firmware Version = V0.0.0
                          Hardware Type = DEFCN DECconcentrator 500
                                     ID = %X08002B13DB67
                  Reset Defaults Switch = True
                       Software Version = "V3.0 B   "
                          Update Switch = False
    
    

DECmcc Debug logging turned on here.
Trace data starting at: 13-SEP-1991 10:28:51.32

*
* Module mcc_enet_am_show entry point
* 13-SEP-1991 10:28:51.38
*
*
* mcc_enet_am__call_cea REQUEST:
* 13-SEP-1991 10:28:52.01
*
* Buffer Dump :
* Buffer Address = 7FEBEF04  (2146168580 dec)
* Buffer size    = 00000003  (         3 dec)
*
*                    Hex                                 Ascii        Offset
* 09 01 00                                         ...               00000003
*
*
* mcc_enet_am__call_cea Completed. RESPONSE:
* 13-SEP-1991 10:28:52.15
*
* Buffer Dump :
* Buffer Address = 00000000  (         0 dec)
* Buffer size    = 00000104  (       260 dec)
*
* Incorrect Buffer for hex dump procedure
*
1500.3Investigation in progress.CHRISB::BRIENENDECmcc Bridge|Station|SNMP Management.Fri Sep 13 1991 12:5313
The previous note (1500.2) was a dump of Ethernet AM V1.1 without the
required patch.

The same error (Buffer Address = 000000) results with DECbridge 500/600s of
recent revision, without the Enet AM patch applied, when non-CSMA/CD counters
are returned in response to the AM's MOP Counters Request (issued on both
SHOW COUNTERS and SHOW STATUS).

Base note stated that version was V1.1.1 (patch applied).

We'll look at this as soon as our DECconcentrator gets here.

					Chris
1500.4..Ethernet_AM V1.1.1EISNCG::MEHRFri Sep 13 1991 15:0033
	RE .2 Thanks, Ray. For reproducing the problem.
	You are always a great help....

	Re .1 &.3 Thanks for quick response.

	I am at customer site, connecting through a 1200bud modem. 
	I can not sent the log files, at least not easily!
	
	My symptoms are very much like what Ray described,
	except I get a failure with SHOW ALL ATTRIBUTES too!

	Some clarification: Yes I did apply the patch. and yes the AM is
	V1.1.1

	The concentrators are all 
	Software Version 2.3 and 
	Software Implementation Type:  DEFCN
	ROM Version:	.0
	ROM Implementation Type:  DEFCN

	
	Based on .3, it sounds like this info should do for now!
	
	Please also look into the second bullet in note 1501.0
    	to see whether that  was caused by this problem!
    	
	Do you have  any idea when you will get the concentrators to test 
	them?


Thanks
                                                       
1500.5STATION = *any* 802.2 ?CHRISB::BRIENENDECmcc Bridge|Station|SNMP Management.Fri Sep 13 1991 18:4142
The DECbridge 620 and DECconcentrator arrived here around 2pm.

Some preliminary testing reveals, with our local version of DECmcc V1.1 and
Ethernet AM V1.1.1, that:

	SHOW ALL COUNTERS works as expected (we return an exception)
	SHOW ALL STATUS accvios
	(SHOW ALL ATTR would also accvio, since it results in calls to
	  SHOW ALL STATUS along with the other partitions).

We'll do more testing on Monday.

Not that it matters at this point, but:
--------------------------------------
"Ethernet AM", as a byproduct of "translating bridges" (e.g. DECbridge 5xx/6xx
for FDDI, IBM's for Token Ring, who else?), now allows STATION commands to
work with Token Ring and FDDI based devices (it's no longer just an
"Ethernet Station").

A case in point: DECconcentrators connect to FDDI rings, not Ethernet LANs.
Since DECbridges translate ethernet packets to FDDI packets, 802.2 XID and
802 TEST commands work to it. But MOP V4 request packets also make it
onto the FDDI ring. Since FDDI's MOP Counters response is different from
CSMA/CD's MOP Counters, confusion results (particularly if you were expecting
only the smaller CSMA/CD counters!). Request ID (mapped to SHOW ALL CHAR)
works fine, since the format is the same.

What to do?  For patching of Ethernet AM V1.1, we're forcing oversized
MOP Counter responses to generate an Exception (beats ACCVIO).
For Ethernet AM V1.2, we're doing the same: function freeze has
already occurred, and adding FDDI counters involves lots of new code
and MSL (/documentation/online help) to recognize new attributes.

Hopefully for the "next" release of Ethernet AM after V1.2 (or maybe 
adding it to V1.2 during EFT? :-), we'll be adding support for the new 
fddi counters (they could come in handy, and "STATION" is a handy/generic
class name :-).

Of course someone (else) should lobby the FDDI AM to support FDDI
MOP counters (but I already asked: they said "no").

						Chris
1500.6Byte ordering?SUBWAY::REILLYMike Reilly - New York Bank DistrictTue Sep 17 1991 17:395
    Chris,
    	Does the new STATION AM handle the byte ordering correctly for Token
    Ring?
    
    - Mike
1500.7You're kidding, right?CHRISB::BRIENENDECmcc Bridge|Station|SNMP Management.Tue Sep 17 1991 17:5413
>    Chris,
>    	Does the new STATION AM handle the byte ordering correctly for Token
>    Ring?
>    
>    - Mike

  You're kidding, right?

  Actually, is there a byte ordering problem that we could/should
  handle? 


						Chris
1500.8SUBWAY::REILLYMike Reilly - New York Bank DistrictTue Sep 17 1991 18:2610
    I have a few token ring devices registered at this site. The devices
    are connected via an IBM 8209 TR-Ethernet bridge.  On the TR the
    order the individual address bits are transmitted is the opposite to the
    order on Ethernet. Thus to register a station with an address of 
    08-00-2b-xx-xx-xx, I have to register a device with an address of 
    01-00-4D-xx-xx-xx.  Will our Token Ring cards take care of this or
    will you have to add code to handle it?  Will we be able to register
    devices which are on the far side of a TR_Ethernet bridge?
    
    _ Mike
1500.9No special code in Ethernet AM...CHRISB::BRIENENDECmcc Bridge|Station|SNMP Management.Tue Sep 17 1991 19:2124
RE: Token Ring Stations

> Thus to register a station with an address of
> 08-00-2b-xx-xx-xx, I have to register a device with an address of
> 01-00-4D-xx-xx-xx.

  If this works, then just REGISTER it with the "backwards" address.
  Maybe specify the "backwards" address as ALTERNATE ADDRESS... 

> Will our Token Ring cards take care of this or
> will you have to add code to handle it? 

  Ethernet AM, which uses an Ethernet Device to communicate with a
  target Station, will NOT (at least in the short term) be adding code
  to special case Token Ring. We might, long term, add support for
  TR specific MOP Counters if they get defined...

> Will we be able to register
> devices which are on the far side of a TR_Ethernet bridge?

  Mike, have you tried this yet?  My guess is that it might actually
  work...

						Chris
1500.10SUBWAY::REILLYMike Reilly - New York Bank DistrictWed Sep 18 1991 11:216
    Chris,
    	I have been able to register devices connected by a TR-Ethernet
    bridge with 802.2 XID and TEST directives working correctly. Using the
    'bit swapped' address as an alternate address is a good idea.
                                                                      
    - Mike