Conference netcad::hub_mgnt

1651.0. "Redundant question!" by EEMELI::RUOTILA () Thu Nov 03 1994 02:29

    
    Hi,
    
    I would like to know if the following configuration is OK and
    how long it could take before DECswitch 900 EE turns from 
    Primary to Secondary? As soon as Spanning Tree notice the situation?
    
    I am only interested in the redundancy configuration.  My idea is to
    build two exactly same way configured DEChub 900 so that HUB1 gives
    Primary connection to the devices behind DECrepeater 900FP and
    Secondary connection comes from HUB2.
    Shortly, HUB1 is Primary and HUB2 is Backup.
    
    Here comes the configuration:       P = Primary link
    				        B = Backup link            
                                        SEG1 = Thick-Ethernet
    					SEG2 = Thick-Ethernet
                                        DEBMP = DECSWITCH 900 EE
                                        DEFMM = DECREPEATER 900 FP
                             P (Optic)
                    I----------------------------------I
                    I        B (Optic)                 I
                    II--------------------------------II
    		----II----------		  ----II----------
                !D !D !        !                  !D !D !        !
              P !E !E !        !                  !E !E !        !
            ----!B !F ! HUB1   !                  !B !F ! HUB2   !
            I P !M !M !        !                B !M !M !        !
            I --!P !M !        ! I----------------!P !M !        !
    	    I I	---------------- I	          --I--------------
            I I----------------------------I        I B
            I                    I         I        I
            I                    I         I        I
     SEG1 *------------------------*     *-----------------------* SEG2
    
    
    I would be very grateful if someone could confirm that this
    configuration is OK and access to SEG1 and SEG2 works if HUB1 primary
    links fails.
    
    Thanks in advance, Risto