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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

2083.0. "DB900MX port restarts/bad bridge hello exceeded" by KAOFS::S_HYNDMAN (Ride life's curves) Wed Mar 08 1995 17:11

	I have a Decbridge 900MX which is frequently logging port restarts.
The Bad Hello Limit Exceeded counter is also incrementing rapidly.  I'm not 
clear what the "Bad Hello Limit Exceeded" means.  I have included a diagram
below of my configuration.  This a "Cell" in which we factory load software
on our PCs from the infoservers.  I have tried a different bridge port and the
problem stays with the Cell.

	Any ideas?

Scott

		
		DB900MX
		   | port 5
		   |
		   |
		   |UTP
                   |
                   |
                 TP Mau
                  Dempr ------------------------------------------ thinwire  
                   |         | 		|	|	|	|
		   |	Infoserver      pc      pc   	pc	pc        
   		   |
		   DB90 ------------------------------------------ thinwire
			     |		|	|	|	|
			Infoserver      pc      pc      pc      pc
T.RTitleUserPersonal
Name		DateLines
2083.2NETCAD::ANILWed Mar 15 1995 14:434
    Looks like the DB90 in the cell is confused and sending bad hellos. 
    Rebooting it, preferably with factory defaults, should help.
    
    Anil
2083.3KAOFS::S_HYNDMANRide life's curvesWed Mar 15 1995 16:2710
    
    
    re: -1
    
    	   That's kinda what I thought so I asked that the DB90 get swapped
    out.  That apparently has been done, however the problem persists.  Is
    there something I could look at with the Data Capture from Probewatch
    to isolate the problem?
    
    Scott
2083.4NETCAD::ANILThu Mar 16 1995 16:2010
If you grab all packets destined to 01-80-C2-00-00-00 (802.1D Hello
Multicast), and you'll probably see two each second given that the
DB90 is generating bad hellos, their contents should give a clue on
what's going on.  If you use a NG Sniffer, it'll even take them apart
and describe which bridge is advertising what information etc.

One solution is to just remove the DB90.. in this configuration, the
DECswitch port is probably providing sufficient bridging capability.

Anil