Re: Fwd: Minutes / Notes

[Pekka Savola <pekkas@netcore.fi>]

On Fri, 18 Jul 2003, Brian E Carpenter wrote:
> Well, this is one of the many "shoulds" in our agreed list
> of goals. Whether we can achieve this "should" simultaneously
> with enough of the others is very much an open question
> in my mind, and it's one of the reasons why we may end up
> with more than one solution. In some scenarios, this may
> be a dominant goal; in other scenarios, it may be unimportant.

I agree that handling broken connections is useful.

However, I also think that one must apply some reason here.  For example, 
if you have have tunnels from two access routers to two ISP's ("site exit 
routers approach"), I don't think you have to care about connection 
survivability that much.

ISPs' networks don't crash every other day (if they do, change the ISPs;  
we just can't design protocols to work around broken operational
practices: that's going to fail, no matter what).  Might happen a couple
of times during the year, at most, but I'm not convinced that's
necessarily a huge problem.

> > -----Original Message-----
> > From: Tony Li [mailto:Tony.Li@procket.com]
> > Sent: Thursday, July 17, 2003 12:38 PM
> > To: J. Noel Chiappa; multi6@ops.ietf.org
> > Subject: RE: Fwd: Minutes / Notes
> > 
> > Noel,
> > 
> > |    This is only important if you want TCP connections to be
> > |    able to survive
> > |    having an incoming link fail (i.e. the address on the
> > |    local end becomes
> > |    unreachable to the rest of the network). This may not be
> > |    an important goal
> > |    (e.g. the typical web site wouldn't care).
> > 
> > I believe that the WG has come to rough consensus that this is,
> > in fact, an important goal for us to solve.  There are
> > numerous practical applications that drive this.  More generally,
> > we (IETF, vendors) are being asked to make the Internet safe
> > for "mission critical" applications and having broken TCP
> > connections is simply unacceptable.  Many applications today
> > are being outsourced: backups, storage, business applications,
> > interactions within an 'extra-net', etc.
> > 
> > Tony
> 

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings