Conference 7.286::fddi

934.0. "Device buffer size/LRP size?" by ABACUS::BUKOWSKI () Fri Apr 16 1993 13:07

    Could somebody answer a few question for me?  We have several VAX
    6xxx's running VMS 5.5-1.  All of them are using a DEMFA (FDDI
    contoller) for their network interconnect.  Because of the version
    of VMS, NCP does not recognize a line protocol type of FDDI, so we
    have to run our DEMFA's with a line protocol type of ETHERNET.
    
    1- What problem can this cuase?
    
    2- Since we are not able to set a NCP line type of FDDI, we can not
       take full advantage of the large FDDI packet size, but will
       increasing our LRP size benifit us at all?
    
    3- I assume that once we do upgrade to 5.5-2 our 6.0 that we should:
    	.change ncp line protocol to FDDI
    	.change device buffer size to 45??
    	.change the LRP size to 4571?
    
    4- Should we be setting our LRP size equal to or a bit larger than the
       ncp line device buffer size?
    
    Thanks,
    Mike