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Conference help::decnet-osi_for_vms

Title:DECnet/OSI for OpenVMS
Moderator:TUXEDO::FONSECA
Created:Thu Feb 21 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3990
Total number of notes:19027

3973.0. "hanging NSP ports in OSI 7.0" by BACHUS::KNEUTS (Erwin Kneuts DTN 856-8726) Mon May 26 1997 12:39

Config: VMS VAX 7.0
        OSI 7.0

My customer has problems with dialup connections from Phase IV Clients (PC's).
When the connection drops ( PC switched off or physical link problem) he has to
wait several minutes for a MSG$PATHLOST . A SYS$DASSGN of the link before the
MSG$PATHLOST comes through results in a hang of the call.
Customer tried to get around with an  asynchronous QIO-DEACCESS!SYNC followed
by SYS$DASSGN. In some cases the QIO still remains with an outstanding AST.

The hanging  logical links can still be found back ( session control port and
 nsp port).  The links have an  estimated roundtrip delay of 5000 and more.

tracing in the routers (WR250) does not reveal any trace of the link: they
clean up correctly.

Up to now only reboot helps.

Can someone assist on this?
Thx
Erwin
T.RTitleUserPersonal
Name
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3973.1Sounds like DECnet-PLUS is trying harder...TWICK::PETTENGILLmulpThu May 29 1997 00:2610
This sounds like one of the complaints with TCP/IP: "the client was powered
off three days ago; why is the application server still taking up memory
for that client?"

Of course, the counter complaint is "why does DECnet disconnect after a few
minutes?  With TCP/IP I can disconnect the network for a couple of hours
and then reconnect and resume right where I left off."

The only thing that really seems like a bug is that the I/O isn't cleaned up
faster when an abort is done.