Re: [mpls] Comments about lagging TCP connection close// Re: RESEND: poll on making draft-manral-mpls-ldp-ipv6-04 a working group doc

Hi Mach,

Thanks for your support and bring up this point.

This is really a corner case, though it still needs to be addressed. 

An easier logic would be to not go by the time of the session
establishment, but rather prefer IPv6 based session for such corner
case, by default. This would simplify the implementation and bring
determinism.

Note that point#3 in section 6.1 will avoid bringing down an existing
session, so we are covered.

Cheers,
Rajiv

> -----Original Message-----
> From: Mach Chen [mailto:mach@huawei.com]
> Sent: Friday, October 15, 2010 2:36 AM
> To: Vishwas Manral; Rajiv Asati (rajiva)
> Cc: mpls@ietf.org
> Subject: Comments about lagging TCP connection close// Re: [mpls]
RESEND: poll on making
> draft-manral-mpls-ldp-ipv6-04 a working group doc
> 
> Hi Vishwas and Rajiv,
> 
> One comment:
> 
> In Section 6.1, it states:
> "An LSR should close the lagging TCP connection for a new LDP
>         session with a remote LSR, if they attempted two TCP
>         connections using IPv4 and IPv6 transports simultaneously"
> 
> Given that LDP TCP connections establishment are based on TCP
three-way
> handshakes, if there are two simultaneous connections initiated by
each
> side, it's possible that each side thinks its own connection is
preceding
> and closes the connection initiated by other side. Thus, in the worst
case,
> both connections may be closed finally.
> 
> Best regards,
> Mach
> 
> --------------------------------------------------
> From: "Mach Chen" <mach@huawei.com>
> Sent: Friday, October 15, 2010 1:15 PM
> To: "Loa Andersson" <loa@pi.nu>; <mpls@ietf.org>; "George Swallow"
> <swallow@cisco.com>; "Vishwas Manral" <vishwas.ietf@gmail.com>; "Rajiv
Asati
> (rajiva)" <rajiva@cisco.com>
> Subject: Re: [mpls] RESEND: poll on making
draft-manral-mpls-ldp-ipv6-04 a
> working group doc
> 
> > Yes/support.
> >
> > Best regards,
> > Mach
> >
> >
> > --------------------------------------------------
> > From: "Loa Andersson" <loa@pi.nu>
> > Sent: Friday, October 15, 2010 12:52 AM
> > To: <mpls@ietf.org>; "George Swallow" <swallow@cisco.com>; "Vishwas
> > Manral" <vishwas.ietf@gmail.com>; "Rajiv Asati (rajiva)"
> > <rajiva@cisco.com>
> > Subject: [mpls] RESEND: poll on making draft-manral-mpls-ldp-ipv6-04
a
> > working group doc
> >
> >> Working Group,
> >>
> >> we have the document re-published!
> >>
> >> the authors of draft-manral-mpls-ldp-ipv6-04 have asked that the
> >> document is accepted as a working group document.
> >>
> >> This starts a two week poll on making it a working group document.
> >>
> >> Please send your comments (support or non-support) to the mpls
working
> >> group mailing list.
> >>
> >> The poll ends October 29, 2010.
> >>
> >> /Loa
> >>
> >> --
> >>
> >>
> >> Loa Andersson                         email:
loa.andersson@ericsson.com
> >> Sr Strategy and Standards Manager            loa@pi.nu
> >> Ericsson Inc                          phone: +46 10 717 52 13
> >>                                              +46 767 72 92 13
> >> _______________________________________________
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> >> mpls@ietf.org
> >> https://www.ietf.org/mailman/listinfo/mpls
> >
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