Conference 7.286::fddi

1190.0. "Failover time on DECbridge 900MX" by HGSW32::KKHAU (KK Hau @HGO) Tue Dec 28 1993 03:28

    Hi, There 
    
    We are going to propose DECbridge 900MX to one of our customer. There is 
    a quesetion on Bridge 900MX. The reason for that is we want to have a 
    resilience connecting for DEChub backplane itself, no single point of 
    failure on the design. If we config the pre-forwarding delay is 10 sec, 
    then what will be the maximum failover time when one bridge is down. 
    i.e. Does the converage take place on the two 900MX bridges on the same 
    hub or on forty bridges on the FDDI ring?  
    
    regards
    
    KK Hau
    



            +--------+-+-+               +-------+-+-+
            | six    |9|9|               | six   |9|9|
            | 900TM  |0|0| ... total 20..| 900TM |0|0|
            | repeat |0|0|     900 Hubs  | repeat|0|0|
            |  er's  |B|B|               |  er's |B|B|
            +--------+++++               +-------+++++
                      | | Two DAS                 | |two DAS
                      | |  attach                 | |   attach
                   ---+-+-------------------------+-+-----
                   ---------------------------------------
                             FDDI ring