Subject: DLSw switch to switch protocol reliable transport alternatives

From: "jim (j.) cobban" <[email-masked]>
Date: Thu, 6 Apr 1995 10:49:00 -0400

I would like to have a discussion at the AIW of alternatives to TCP/IP for
the reliable underlying transport for the DLSw Switch to Switch protocol.
In particular I would like to examine how to define an interoperable
specification for connecting DLSws across 802.2 based LANs and WANs, including
Frame-Relay, ATM, and SMDS (DQDB). The topics could include:

  1) Use of a light-weight reliable transport based on RTP in place of
     TCP/IP.  LLC2 is not as desireable because it has fixed windows, and
     therefore cannot adjust to congestion, particularly on WANs.
  2) Discovery of peer DLSws for reduced definitions.
  3) Reduction of CANUREACH_ex traffic through use of multicast.

I would also like to discuss the impact of HPR on DLSw.  The DLSw
specification does discuss transporting UI frames, but I suspect that most
implementations will have difficulty dealing with the use of the second SAP,
since that would probably require the DLSw to inspect the XID as it passes
through.  Also since a second SAP is used without a prior circuit setup,
these UI frames will be handled as DATAFRAMEs rather than DGRMFRAMEs, which
would probably have a significant performance impact.

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From: Gnanaprakasam Pandian <[email-masked]>
Date: Thu, 6 Apr 95 9:34:07 PDT

I suspect that most

Could you please explain a little bit more on this.
thanks
	/pandian