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Conference netcad::hub_mgnt

Title:DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:NETCAD::COLELLADT
Created:Wed Nov 13 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:4455
Total number of notes:16761

922.0. "DECrepeater900FP failover timing..." by PADNOM::PEYRACHE (Jean-Yves Peyrache Country Support Group France) Fri Apr 22 1994 04:57


 hi,

 can't found in documentation of repeater900fp ,as anybody have the timing
issue for the failover between primary link and secondary link during a 

      _ Partial fault detection

      _ Full fault detection

any special recommandation versus protocol timing with failover configuration ?
 
After failover process and if the "old primary link" becomes good ,repeater link
stay on secondary link ?? if yes ,what is the process to go back old
configuration??

 thanks for any comments/informations

 rdgs

 Jean-Yves
T.RTitleUserPersonal
Name		DateLines
922.1less than 15 millisecondsLEVERS::PAGLIARORich Pagliaro, Hub Products GroupTue Apr 26 1994 18:2441
>>    can't found in documentation of repeater900fp ,as anybody have the
>>    timing issue for the failover between primary link and secondary link
>>    during a
>>          _ Partial fault detection
>>
>>          _ Full fault detection
>>
    The failover times for DECrepeater redundant fiber links are as follows:
    
    	     Repeater		     Typical		    Maximum
   	 -----------------	------------------	---------------
    	 DECrepeater900FP       3 - 6 milliseconds      10 milliseconds	
    	 DECrepeater 90FS	4 - 8 milliseconds	15 milliseconds
    
    There are no differences in the failover times between configurations
    using partial fault detection and full fault detection. The only difference
    is that some types of faults will not be detected at all in the partial
    fault detection case. 
    
>>    any special recommandation versus protocol timing with failover
>>    configuration ?
>>
    I don't quite understand your question? Would you please elaborate?
    
>>    After failover process and if the "old primary link" becomes good,
>>    repeater link stay on secondary link ?? if yes ,what is the process  to
>>    go back old configuration??  
    
    A working "standby" link can easily be made the "active" link by using
    the link toggle feature which appears on the HUBwatch redundancy view.
    This can also be accomplished by setting the appropriate MIB object in
    the dechub900-erptr-mib-v1-0.txt extended repeater mib.
    
    It should be stressed that this process is MANUAL. A repeater will NOT
    automatically re-activate a previously broken primary link if the
    fault is removed.  
    
    Regards,
    
    Rich
922.2merci..PADNOM::PEYRACHEJean-Yves Peyrache Country Support Group FranceWed Apr 27 1994 08:0810
 
 thanks rich,
 
 all informations are clear now, due to the low timing of failover , i think
that all procotols (like decnet lavc lat tcpip) works as well in failover
 configuration

 rgds

 Jean-Yves