RE: questions about FCIP connection failure detection

["Dave Peterson" <dap@cisco.com>]

Yes, I will be bringing in some text specific to FC-BB-2 "entity" discovery.

But, this text will not address how one discovers a TCP connection failure
in the context below...

See Don Fraser's thread which reflects the lastest text on this subject.

Dave



> -----Original Message-----
> From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of
> Murali Rajagopal
> Sent: Thursday, April 25, 2002 6:55 PM
> To: Chong Peng; ips@ece.cmu.edu
> Subject: RE: questions about FCIP connection failure detection
>
>
> Chong:
>
> According to the Action Items from the Vancouver T11 meeting,
> Dave Peterson
> is expected  to bring in a contribution at the June T11 meeting on
> Discovery. I will ask Dave to share any text he may at this time on this
> topic. (But note that this will need the approval of the BB-2 WG for
> inclusion into the BB-2 document).
>
> -Murali
>
> -----Original Message-----
> From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of
> Chong Peng
> Sent: Thursday, April 25, 2002 1:48 PM
> To: ips@ece.cmu.edu
> Subject: questions about FCIP connection failure detection
>
>
> Hi, all
>
> The Section 9.4 (TCP Connection Considerations) of
> draft-ietf-ips-fcovertcpip-09
> says:
>
>    In idle mode, a TCP Connection "keep alive" option of TCP is
>    normally used to keep a connection alive. However, this timeout is
>    fairly large and may prevent early detection of loss of
>    connectivity. In order to facilitate faster detection of loss of
>    connectivity, FC Entities SHOULD implement some form of Fibre
>    Channel connection failure detection (see FC-BB-2 [4]).
>
>    When an FCIP Entity discovers that TCP connectivity has been lost,
>    the FCIP Entity SHALL notify the FC Entity of the failure including
>    information about the reason for the failure.
>
> I have a couple of questions regarding this section:
>
> 1. The first pragraph states that the FC entity is responsable to discover
> the
>    connection failure. But the second paragraph implys the FCIP entity
> discovers
>    the connection failure first and then notifies the FC entity.
> Is there an
>    editorial error?
> 2. If we let the application protocol on the top of TCP to discover the
>    connection failure, what scheme are we going to use? Are we planning to
>    define some "FCIP keep alive" frames in the future? I checked FC-BB-2,
>    in the section related to discovery (13.2.2.4.2), it says "TBD".
>
> Chong Peng
>
>
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