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Conference forty2::x500

Title:X.500 Directory Services
Notice:Sprt: FORTY2::X500_SUPPORT, Kits: 216.*, try dir/titl=OFFICIAL
Moderator:FORTY2::PULLEN
Created:Tue Jan 30 1990
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1016
Total number of notes:4299

978.0. "ISOTP, what is it?" by VMSNET::R_HARRIS () Tue Feb 25 1997 22:06

    Hello,
    
    I have a customer who is asking a question about ISOTP. He has
    Infobroker V2.1 and is using WWW browser, Netscape to perform Lookups.
    He is noticing that IBX takes about 30 seconds before any action is
    performed by the TCP layer. His analysis comes from a sniffer that is
    looking at the line while the query is being performed. he is seeing
    ISOTP being used and subsequently times out, then TCP takes over 
    about 30 seconds and 15 seconds later, the query is displayed. 
    
    He wants to know what is this ISOTP layer and why is it being used. His
    transport is TCP.
    
    Any idea what he is talking about?
    
    Thanks in advance for your support.
    
    Randy
    csc/at
T.RTitleUserPersonal
Name		DateLines
978.1a-101.tunnel.crl.dec.com::FORTY2::PALKAAndrew Palka Altavista DirectoryWed Feb 26 1997 09:5311
At a guess ISOTP is the OSI transport layer.
Possibly IBX is attempting to use a CLNS or CONS
nsap to connect to the DSA (and failing).
Check the presentation address in the dua.defaults file.
Either remove or correct the CLNS nsap you find there.

Alternatively, you may be able to set 'use clns error
reports' in the transport template - I think this is covered
by the X.500 documentation.

Andrew