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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

954.0. "DB90 Problems with Novell" by BOHIO::WROSARIO () Tue May 03 1994 13:18

    I have a customer that is having problems when connecting a Novell LAN
    to his LAN.  They are running their LAN with TCP/IP and when they
    connect the new LAN the Novell Stations start hanging.  If we removed
    the Novell Lan and isolate him the Novell LAN runs perfect.
    
    In this site we have some HUBS in the computer room and four remote
    closets connected by fiber to the computer room.  The fibers in the
    computer room are connected to a fiber repeater and at the remote
    closets to a DECbridge.
    
    I was lloking in the owners manual to verify how can I filter this on
    the Bridges but it is not to friendly to use.  I also saw in this
    conference that there is not other manual for the bridge.  The customer
    doesn't have Hubwatch.
    
    does anyone knows something related to this?
    Does anyone knows how to filter this?
    
    
    William

T.R	Title	User	Date	Lines
954.1		NPSS::JOHNSON	`Tue May 03 1994 13:44`	6
	William, Check note 843.* in this conference and 281.* in UPSAR::Ethernet. Both describe limitations of DB90s in Novell environments. /mj
954.2	Answer to Note 954.1	BOHIO::WROSARIO	`Tue May 03 1994 15:09`	12
	Right now I'm trying to know if the problem mentioned in note 843.* in this conference was solved because we had a problem like the one mentioned, so that conference doesn't help me. I read already conference 281.* in UPSAR::Ethernet and I'll verify the same with the SPS Group. What are the difference, if any, in the version of the bridges, I was looking in some notes in this conference that a lot of people is recommending to have or upgrade to V3. This because have solutions to previous problems? Or just to have the Bridges in the last version? William
954.3		NPSS::JOHNSON	`Tue May 03 1994 17:03`	23
	William, Please read 843.* again. This problem has NOT been fixed because there is no single fix for it. The DB90 sends a perfectly valid message that some (or possibly MANY) TCP/IP implementations can't handle. As suggested in 843.4, you can disable management and see what happens. With regard to UPSAR::ETHERNET # 281., the DB90 cannot filter anything it can't decipher. Since the Novell 802.3 format really isn't 802.3, the DB90 can't figure out waht it is and just passes it through. Novell also supports Ethernet V2 format which SHOULD* work. The suggestion to upgrade to V3.1 is probably based on the "newer is better" theory. Very little of the DB90's bridge functionality is implemented in the firmware. If you are using something less than 3.1, the upgrade certainly won't hurt but I doubt that it will gain you much. Conversely, there are also two different hardware revisions of the DB90 (only one for the 90FL). These can most easily be identified by the ROM revision, either 1.14 or 2.1. If you have an older unit with 1.14 you might experiment with a 2.1 unit. Please note that the entire unit must be exchanged. The ROMs cannot be interchanged between hardware revisions. /mj
954.4	Keep trying DB90.vs.Novell	BOHIO::WROSARIO	`Wed May 04 1994 10:09`	14
	JOHNSON: Thanks for your inputs, I talked with the SPS guy in order to him to include what we did when we had the problem mentioned in 843.*. This could probably help everyone if they did something different or probably the same. In reference to the original problem we'll be creating a team to attack this problem, as soon as I get more info, bad or good news, I'll be posting the results. tks, william