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Conference netcad::hub_mgnt

Title:DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:NETCAD::COLELLADT
Created:Wed Nov 13 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:4455
Total number of notes:16761

2495.0. "DB90 System Buffer Unavail" by BERFS4::NORD () Mon Jul 10 1995 10:49


	Hi you gurus 90'- and 900'-products,


	I just came back from a customer, who called us 'cause he has some
	trouble with his DECbridge 90.

	He has a LAVC on the workgroup side of the DB90 and whenever he is
	doing a backup from one of the satellites to one of the systems,
	connected throu a DSSI he is seeing an incrementation of the
	"system buffer unavailable"-counter.

	Ok, I do a connect to the bridge and run "DISPLAY" on it. I saw, that
	this counter increments between 3000 and 4000 in 10 sec. with a coun-
	ter-increment of 6000 and 7000 of the "packets received"-counter on
	port 2.

	Yes, I upgraded this bridge to FPROM V3.90 but it's the same.

	Does anybody has seen this befor?, can someone explain what this meens,
	what can I do to resolve this problem, 'cause the customer is a little
	bit angry for the slow performance, when he wants to connect to the
	workgroup side, or the connection gets broken. Sometimes he is unable
	to connect to the workgroup side. 


	Next question:

	I triggered DB90 and then I connect to the bridge, the prompt was:

		">>"

	ups, whats that, I got 5 commands but what do they meen to me? Any
	answers?


	Thanks


	Wolfgang Nord

	at Berlin at Germany
T.RTitleUserPersonal
Name		DateLines
2495.1Ethernet board suspect ?RDGENG::GREIDHail,Hail,Hail and Kill!Tue Jul 11 1995 08:3114
    Wolfgang,
    
    		I have been trying to get to the bottom of this also
    	here at REO. Certainly the first Bridge that I have been 
    	looking at here, logging thousands of these errors, I have 
    	narrowed down by installing a second Hub and splitting the
        repeaters between the two hubs, that one of 6 thinwire connections
        on one of the repeaters is generating it. The errors move from
        one Bridge to another when I move the repeater, so it looks like
    	I have a babbling ethernet controller on one of these connections.
    
    	Maybe this is your problem too ?
    
        Giles.
2495.2no, not the same problemBERFS4::NORDTue Jul 11 1995 12:4328

	Hi Giles,

	I think this is not the problem at customer side.

	I forgot to tell you I've seen this problem only if the traffic
	load is up to over 60% ( the funny IRIS!!!), the counter doesn't
	increment at traffic load under 60 %.

	The LAVC is connected to a DELNI, which is connected to the
	workgroup side of the bridge. The same configuration is done
	with some U*X-systems (OSF/1, ULTRIX, AIX), there are no prob-
	lems. 

	I've checked this problem with a second DB90, same FPROM version,
	same problem on the LAVC side.


	Thanks for your quick answer

	Wolfgang

	PS.: And all you other gurus out there in the world, I can't read
	the answers so fast as I get it from you. Are you all in the holi-
	days, no one inside, all outside? No engineer, who knows some
	internals of the DECbridge 90, or do a have to fill in a formular
	named IPMT or so?
2495.3reply .0NPSS::RAUHALAFri Mar 15 1996 16:3519
	Next question:

	I triggered DB90 and then I connect to the bridge, the prompt was:

		">>"

	ups, whats that, I got 5 commands but what do they meen to me? Any
	answers?
    --------------------------------------------------
    
    the >> prompt means you are in diagnostic mode.
    
    when you are in this mode, you will need to re-load the code
    into the DEWGB.  I'm guessing you tried to do a load and it
    failed because the network was busy or something.  At this
    point the image is not completely loaded and the DEWGB
    enters diag mode.
    
    ken