Subject: cleanup item from DLSw V1 to DLSw V2

From: "Peter W. Gayek" <[email-masked]>
Date: Fri, 18 Aug 95 16:04:47 EDT

Paul,
When this question came up, some of the frames in question were
TEST_CIRCUIT_REQ and TEST_CIRCUIT_RSP.  The intent of the piggy-backing
idea was to reduce the number of required messages at circuit bring-up
or reset time.  Since these two do not flow at that time, I feel that we
should not permit FCI/FCA/FCO on these frames.

Shannon's original list (which was eliminated because it seemed to
duplicate Gene's diagram/list) included the following messages as
"piggy-backing allowed" (taken from dlsw015.txt):

  CUR_cs, ICR_cs, REACH_ACK, XIDFRAME, DGRMFRAME, CONTACT, CONTACTED

When we got rid of this list, I think there was discussion and
consensus it was ok to add RESTART_DL/DL_RESTARTED as Gene had done.

So my feeling is that if you choose to add other msg types to make the
list comprehensive, all frames added should not allow the flow ctrl
indicators unless there is a new discussion about them.
Regards,
Peter

>  Paul,
>
>     There has been some confusion here about which SSP messages may carry
>     valid flow control information. There is a statement on page 70 of
>     the V1 document dated 01/15/95 that states "The diagram below shows
>     the messages that may carry valid flow control information:". But
>     the SSP messages in the diagram does not show all SSP messages. There
>     are some valid and some invalid SSP messages in the diagram, but it
>     does not say anything about the SSP messages that are not in the diagram.
>     The IFCM message is not in the diagram either (although this is obvious).
>
>     As a cleanup item for V2, I suggest for each SSP message we specify
>     whether that SSP message is valid for carrying flow control
>     information. This will help eliminate any question as to whether
>     a particular SSP message is allowed to carry flow control information.
>
>  Regards,
>     wayne n. taylor
>

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From: [email-masked] (Hugo Euben)
Date: 18 Aug 1995 21:35:32 GMT

I will be out of the office, returning August 21, 1995 morning. However, If
urgent, use corporate VoiceMail at x5502, or leave me a message at +33  92
966 960.
Thanks ..... Hugo