Conference netcad::hub_mgnt

2377.0. "DECswiwtch900EF and Gigaswitch conf?" by WARABI::CHIUANDREW () Tue Jun 13 1995 02:12

Hi,

Just want to confirm the following Gigaswitch/DECswitch900EF configuration:
where Gigaswitches (GS1 and GS2) are connected via 2 Group Links (S-S 
connections) and the two DECswitches (DS1 and DS2) are connected via M-S,
(A-port of DS1 converted to M, B-port of DS1 converted to S and it is the
same for DECswitch900EF DS2). The connections of DECswitch900EFs are via Front
panel and they are installed in a DEChub900, my questions are:
 

                       --------------           ---------------
		       |    DS1     |           |    DS2      |
	    ---------- | S        M |-----------|S(B)      M  |
	    |	       | (B)     (A)|           |          (A)|------|
	    |	       --------------           ---------------      |
            |                                                        |
            |                                                        |
	    |                                                        |
    -----------------                          -----------------     |
    |       M       |                          |               |     |
    | Gigaswitch1  S|--------------------------|S  Gigaswitch2 |     |
    |              S|--------------------------|S            S |------
    |               |                          |               |
    -----------------                          -----------------
           

1) Is it a 'valid' FDDI tree configuration (since we have a tree, root is GS1,
but GS1/GS2 are connected via GROUP LINKS)?

2) If the GROUP LINKS between GS1 and GS2 are active all the time, then will 
   M-S connection between DS1/DS2 in backup/standby/active mode?

3) If link between DS1/GS1 is down, can Ethernet LANs connected to DS1, still
   communicate with LANs connected to GS1 via DS2/GS2?
  
thanks in advance for help!
Andrew Chiu - Network services Sydney


NOTE: Cross post in HUB_MGNT and GIGASWITCH notes conferences.