Subject: Re: [Tsvwg] SCTP:flight size

From: Randall Stewart <[email-masked]>
Date: Thu, 01 Aug 2002 08:03:58 -0500

Any time you mark something for retransmission it
is no longer considered in the network... In the
case of PR-SCTP you mark it for skipping INSTEAD
of marking it for retransmission. Thus it to
is considered not in flight...

R

"Brian F. G. Bidulock" wrote:
> 
> Randall,
> 
> If FR marks for retransmission but doesn't reduce
> flight size then (1) below is incorrect.
> 
> > > > 1) They are NOT marked for retransmission
> 
> --brian
> 
> On Wed, 31 Jul 2002, Randall Stewart wrote:
> 
> > What does FR and bursts have to
> > do with flight size?
> >
> > If you FR something it remains in flight. If you recoginize
> > it as needing FR but can't due to a cwnd limit.. its
> > back to being marked for retransmission... in effect the FR
> > marks it for retransmission and then you try to send...
> >
> > I don't see any ambiguity here..
> >
> > R
> >
> > "Brian F. G. Bidulock" wrote:
> > >
> > > Randall,
> > >
> > > What about FR and bursts?
> > >
> > > --brian
> > >
> > > On Wed, 31 Jul 2002, Randall Stewart wrote:
> > >
> > > > Brian:
> > > >
> > > > You are correct in that a prsctp packet may not marked for
> > > > retransmission after a time-out. If it is decided that we
> > > > will NOT retransmit it we end up marking it to be skipped
> > > > by.. but it is also not considered inflight...  so I guess
> > > > in summary:
> > > >
> > > > Packets are considered in flight if:
> > > >
> > > > 1) They are NOT marked for retransmission
> > > > <and>
> > > > 2) They are NOT marked to be skipped or dropped (pr-sctp)
> > > > <and>
> > > > 3) They have been transmitted and are un-acknowledged.
> > > >
> > > > A timeout of course causes 1 and or 2 to happen to anything
> > > > in flight.
> > > >
> > > >
> > > > R
> > > >
> > > >
> > > >
> > > >
> > > > "Brian F. G. Bidulock" wrote:
> > > > >
> > > > > Iván,
> > > > >
> > > > > prsctp packets are not always marked for retransmission after timeout...
> > > > >
> > > > > --brian
> > > > >
> > > > > On Wed, 31 Jul 2002, [email-masked] wrote:
> > > > >
> > > > > >       Of course but, if they have timed-out, they are always marked for retransmission, and they are not considered to be "in the air" anymore...
> > > > > >
> > > > > >       BR Iván Arias Rodríguez
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: ext Brian F. G. Bidulock [mailto:[email-masked]]
> > > > > > > Sent: 31. July 2002 15:19
> > > > > > > To: Randall Stewart
> > > > > > > Cc: Khan, Mohammad; [email-masked]'; Pathak, Sunil K; Subramaniam,
> > > > > > > Siva; Patel, Chirayu
> > > > > > > Subject: Re: [Tsvwg] SCTP:flight size
> > > > > > >
> > > > > > >
> > > > > > > Randall,
> > > > > > >
> > > > > > > ...and not timed-out and not marked for retransmission...
> > > > > > >
> > > > > > > --brian
> > > > > > >
> > > > > > > On Wed, 31 Jul 2002, Randall Stewart wrote:
> > > > > > >
> > > > > > > > Yes,
> > > > > > > >
> > > > > > > > it is what you have sent but is "in the air" and un-acknowledged.
> > > > > > > >
> > > > > > > > R
> > > > > > > >
> > > > > > > > "Khan, Mohammad" wrote:
> > > > > > > > >
> > > > > > > > > Randall,
> > > > > > > > > Can I take the flightsize as "the number of bytes not
> > > > > > > acknowledged by peer
> > > > > > > > > for the specific destination address"
> > > > > > > > > Regds
> > > > > > > > > kashif
> > > > > > > > >
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > -----Original Message-----
> > > > > > > > > From: Randall Stewart [mailto:[email-masked]]
> > > > > > > > > Sent: Tuesday, July 30, 2002 7:03 PM
> > > > > > > > > To: Khan, Mohammad
> > > > > > > > > Cc: [email-masked]'; Pathak, Sunil K
> > > > > > > > > Subject: Re: [Tsvwg] SCTP:flight size
> > > > > > > > >
> > > > > > > > > "Khan, Mohammad" wrote:
> > > > > > > > > >
> > > > > > > > > > Hi All,
> > > > > > > > > > In sctpimpguide-05.txt section 2.14.2 a variable
> > > > > > > flightsize is specified.
> > > > > > > > > Is
> > > > > > > > > > it the size of data requested by the SCTP User? Pls confirm.
> > > > > > > > > > Regards
> > > > > > > > > > kashif
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > _______________________________________________
> > > > > > > > > > tsvwg mailing list
> > > > > > > > > > [email-masked]
> > > > > > > > > > https://www1.ietf.org/mailman/listinfo/tsvwg
> > > > > > > > > Kashif:
> > > > > > > > >
> > > > > > > > > Flight size is the number of bytes "in-transit" to the remote
> > > > > > > > > peer. We probably should have a defintion here.. since I see
> > > > > > > > > we have slipped back in to specifying it.. something we
> > > > > > > > > tried to avoid the first time around :-0... but I guess
> > > > > > > > > it is hard NOT to mention it .
> > > > > > > > >
> > > > > > > > > R
> > > > > > > > >
> > > > > > > > > --
> > > > > > > > > Randall R. Stewart
> > > > > > > > > [email-masked] 815-342-5222 (cell phone)
> > > > > > > > >
> > > > > > > > > _______________________________________________
> > > > > > > > > tsvwg mailing list
> > > > > > > > > [email-masked]
> > > > > > > > > https://www1.ietf.org/mailman/listinfo/tsvwg
> > > > > > > >
> > > > > > > > --
> > > > > > > > Randall R. Stewart
> > > > > > > > [email-masked] 815-342-5222 (cell phone)
> > > > > > > >
> > > > > > > > _______________________________________________
> > > > > > > > tsvwg mailing list
> > > > > > > > [email-masked]
> > > > > > > > https://www1.ietf.org/mailman/listinfo/tsvwg
> > > > > > >
> > > > > > > --
> > > > > > > Brian F. G. Bidulock    ¦ The reasonable man adapts himself to the ¦
> > > > > > > [email-masked]    ¦ world; the unreasonable one persists in  ¦
> > > > > > > http://www.openss7.org/ ¦ trying  to adapt the  world  to himself. ¦
> > > > > > >                         ¦ Therefore  all  progress  depends on the ¦
> > > > > > >                         ¦ unreasonable man. -- George Bernard Shaw ¦
> > > > > > >
> > > > > > > _______________________________________________
> > > > > > > tsvwg mailing list
> > > > > > > [email-masked]
> > > > > > > https://www1.ietf.org/mailman/listinfo/tsvwg
> > > > > > >
> > > > >
> > > > > --
> > > > > Brian F. G. Bidulock    ¦ The reasonable man adapts himself to the ¦
> > > > > [email-masked]    ¦ world; the unreasonable one persists in  ¦
> > > > > http://www.openss7.org/ ¦ trying  to adapt the  world  to himself. ¦
> > > > >                         ¦ Therefore  all  progress  depends on the ¦
> > > > >                         ¦ unreasonable man. -- George Bernard Shaw ¦
> > > > >
> > > > > _______________________________________________
> > > > > tsvwg mailing list
> > > > > [email-masked]
> > > > > https://www1.ietf.org/mailman/listinfo/tsvwg
> > > >
> > > > --
> > > > Randall R. Stewart
> > > > [email-masked] 815-342-5222 (cell phone)
> > >
> > > --
> > > Brian F. G. Bidulock    ¦ The reasonable man adapts himself to the ¦
> > > [email-masked]    ¦ world; the unreasonable one persists in  ¦
> > > http://www.openss7.org/ ¦ trying  to adapt the  world  to himself. ¦
> > >                         ¦ Therefore  all  progress  depends on the ¦
> > >                         ¦ unreasonable man. -- George Bernard Shaw ¦
> >
> > --
> > Randall R. Stewart
> > [email-masked] 815-342-5222 (cell phone)
> 
> --
> Brian F. G. Bidulock    ¦ The reasonable man adapts himself to the ¦
> [email-masked]    ¦ world; the unreasonable one persists in  ¦
> http://www.openss7.org/ ¦ trying  to adapt the  world  to himself. ¦
>                         ¦ Therefore  all  progress  depends on the ¦
>                         ¦ unreasonable man. -- George Bernard Shaw ¦
> 
> _______________________________________________
> tsvwg mailing list
> [email-masked]
> https://www1.ietf.org/mailman/listinfo/tsvwg

-- 
Randall R. Stewart
[email-masked] 815-342-5222 (cell phone)

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