Re: transport selector

Colin Robbins <c.robbins@nexor.co.uk> Fri, 22 October 1993 16:36 UTC

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From: Colin Robbins <c.robbins@nexor.co.uk>
Message-ID: <"23041 Fri Oct 22 16:49:51 1993"@nexor.co.uk>
To: Ton Verschuren <Ton.Verschuren@surfnet.nl>
Cc: " (Jason Cross)" <cross@ae.eds.com>, ISODE@nic.ddn.mil, osi-ds@cs.ucl.ac.uk, quipu@cs.ucl.ac.uk
In-Reply-To: <"survis.sur.152:22.09.93.13.23.15"@surfnet.nl>
Subject: Re: transport selector

   >You mean you canNOT get away with not specifying a TSEL, don't you? If
   >you don't use a TSEL, the default is used. The Quipu default TSEL is
   >'0101'H.

No.

QUIPU does not have a default TSEL.  If you don't sepecify one, then
no TSEL is used.

If you want a TSEL use...

       TSEL/address1|address2

If you don't want a TSEL, then just put

       address1|address2
e.g., 

      Internet=123.456.789.123+17003


The TSEL applies to all addresses, so

      '0101H/Internet=123.456.789.123+17003|X121+1234567890

means both

      '0101H/Internet=123.456.789.123+17003
and
      '0101H/X121+1234567890


Your confusion might be caused by the QUIPU TSEL checking code - the
TSEL registered in the DSA address as the address called (dsaptailor
file) have to be the same.   Hence if the DSA listens on 

      Internet=123.456.789.123+17003

Then connecting to

      '0101'H/Internet=123.456.789.123+17003 

will result in an application layer failure.

Similarly, if the DSA listens on

      '0101'H/Internet=123.456.789.123+17003 

Then connecting to

      Internet=123.456.789.123+17003

will result in a failure.



Colin