Conference netcad::hub_mgnt

4230.0. "PS900TP: Groups and TW?" by LEMAN::PAIVA (Hawkeye - Network Support @GEO) Thu Feb 20 1997 16:39

    Hi!
    
    I am experiencing the following problem (or lack of understanding):
    
    I have 2 Portswitch 900TP (V2.1.1) and 1 DECswitch 900EE (V1.7.0) in
    slots 6,7 and 8 of a DH900 (V4.2.0 or V5.0.0). All the ports of the
    Portswitches belong to group 1 and the TW is assigned to group 1. The
    DS900EE has ports 2, 4 and 5 redirected to the BP. Port 2 is connected to
    the TW. Port 4 is connected to Lan-1 where group 1 of PS900TP in
    slot 6 is connected. Port 5 is connected to Lan-2 where group 1 of
    PS900TP in slot 8 is connected.
    
    Now I have 2 stations. One connnected to any port in PS900TP slot 6 and
    the other one to any port in PS900TP in slot 7. If I connect one or
    both of the group 7 (TW) of the Portswitches to the TW (the
    corresponding port(s) in the DS900EE becomes in backup state, the 2
    stations can communicate properly (30 successful pings). If I disconnect
    both group 7s from the TW, only 3 or 4 of the 30 pings will reach its
    destination.
    
    The only idea I thought of when driving home was to assign the ThinWire
    to any unused group (2 to 6)? However, it wouldn't give me an
    explanation...
    
    Can someone shed some light in here?
    
    Pedro
      

You are eactly correct, in that you need to disconnect the two PORTswitch 
900FPs from the ThinWire. This can be accomplished in a couple of ways.

One way is to use MCM, do a "view", "LAN Interconnect" and use the mouse to 
disconnect the "7" stub on both of the PORTswitch 900FP modules.

The other way is to get to the Port Switch menu for each individual module 
(this can be done by single clicking on the FP module on the LAN internconnect 
menu and then pressing the Port Switch button on the bottom of the screen). At 
this screen  there is a box toward the bottom on the left hand side that 
defines what group the ThinWire stub is associated with. There is a pulldown, 
which can be used to reassign the group to which the ThinWire is associated.

I personally would chose the first way, since you could screw yourself up 
down the road by choosing method two, if you create other LAN groups on the 
900FP down the road.

Dennis Faust

    Dennis,
    
    Well, the problem is that when I disconnect both group 7 of the
    PortSwitches 900 TP, I have the problem of having only 3 or 4 among the
    30 pings that are OK. Hence my posting.
    
    Pedro
    

    The problem was the DECswitch 900EE. Once it was replaced (again...)
    everything was back in order.
    
    Pedro