Conference netcad::hub_mgnt

2648.0. "900MX PHY LED not lit when it should.." by SALUD::ORTIZ () Wed Aug 16 1995 16:17

    I have a site that has a DEChub 900. The initial setup in the hub is as 
    follows:
    
                    slot 7                  slot 8
    
               900MX Concentrator "A"       900EF bridge
    
                 port a  - front              port a - back
                 port b  - back               port b - front -- going to
    					          port a on 900EF in the next
    						  Hub900
    Port A and Port B LEDs on the 900EF bridge are lit, which is what we
    should
    see. Slot 7 and Slot 8 are connected to the FDDI LAN.
    
    New scenario. He takes Concentrator "A" out of slot 7 and puts it in
    Slot 6.
    He puts in another 900MX Concentrator "B" in Slot 7:
    
            slot 6                  slot 7                  slot 8
    
        900MX Concentrator "A"   900MX Concentrator "B"   900EF bridge
    
            port a - front          port a - back         port a - back
            port b - back           port b - back         port b - front
    							  (going to port a on
    							   900EF in next 
    							   HUB900)
    
    Port A and Port B PHY LEDs on the 900MX Concentrator are NOT LIT, However,
    he connects to the M port and all is well. We go into HUBwatch and look
    at port A and port B and they are in CONNECTING MODE, which tells me
    why we are not seeing the PHY port not lit. I can't see how wrapping is 
    here since both ports are in a CONNECTING MODE. They are running HUB 
    firmware 4.0 and DECconcentrator 900MX 3.0.0. Hubwatch is also at 4.0
    
    Any help would be appreciated...
    
    Richard 
    
    

    Okay, let's make sure we are on the same page...


>    Port A and Port B PHY LEDs on the 900MX Concentrator are NOT LIT, However,
>    he connects to the M port and all is well.

	Are you talking about slot #7 here? How do you know "all is well", are
	you communicating with another station on the ring, etc?

        Also, when the concentrator is configured to have both A,B out the
        back, the front panel connectors become M ports - the phy lights are
        for those M ports, and you have no phy lights for the backplane A,B
        ports. All you have then is the "#" led, which will light with
        _any_ connection.

        Double-click on the module body (not the ports) to bring up the FDDI
        summary screen. At the bottom you will see a scrolling view
        of the ports, and A and B will be at the bottom labelled BP1 and BP2. 


>    We go into HUBwatch and look
>    at port A and port B and they are in CONNECTING MODE, which tells me

	Are you sure? You're probably looking at a front panel M port that 
	has no connection. Whats the port type (top left box)?.


>    why we are not seeing the PHY port not lit. I can't see how wrapping is 
>    here since both ports are in a CONNECTING MODE. They are running HUB 
>    firmware 4.0 and DECconcentrator 900MX 3.0.0. Hubwatch is also at 4.0
>    
	You can tell if the concentrator is wrapped or through using the 
	FDDI summary window, top right box, the CF state object.


	Hope this helps.

	-Mike