The MPLS WG Archive

[Giles Heron <giles@packetexchange.net>]

Shahram Davari wrote:
> 
> Eric,
> 
> It is interesting to note that LSP-ping in conjunction with ICMP ping is designed to do exactly what we proposed to do, which is automatic detection of failures. In the BOF nobody said we don't need OAM. People's concern was that since they think most networks are RSVP-TE networks, then an RSVP-TE only solution is enough for time being.
> 
> Also apart from Worldcom I didn't hear any objection from any other service provider.

that was because I wasn't there ;-)

Giles

> BTW, were you present in the BOF?
> 
> Yours,
> -Shahram
> 
> > -----Original Message-----
> > From: Eric Rosen [mailto:erosen@cisco.com]
> > Sent: Thursday, December 13, 2001 11:28 AM
> > To: Shahram Davari
> > Cc: 'Giles Heron'; Don Fedyk; Ben Mack-Crane; neil.2.harrison@bt.com;
> > mpls@UU.NET
> > Subject: Re: MPLSOAM BOF meeting draft minutes
> >
> >
> > Shahram> Again, I  would compare  this to  IP networks.  In
> > the IP  case we
> > Shahram> don't  send pings  constantly to  every prefix  in
> > our  networks to
> > Shahram> check that they  are still reachable, so I'm  not
> > 100% convinced we
> > Shahram> should be sending CVs constantly in MPLS?
> >
> > Shahram> The reason is  that in IP networks you  have
> > hop-by-hop routing. So
> > Shahram> if a router's routing table is corrupted, the next
> > hop can send the
> > Shahram> packet in the right direction.
> >
> > More  likely the packet  will travel  around in  a loop.   It
> > is  simply not
> > correct to suppose that IP networks are robust with respect
> > to corruption of
> > a router's routing table.
> >
> > Arun> OAM is required to ensure that customer is given a
> > level of service
> > Arun> that he has contracted for.
> >
> > It seems that not all the service providers agree.
> >
> > The one thing I've learned from this thread is that nobody
> > has changed their
> > opinion, it  seems like the  BoF was just  an excuse to
> > rehash  a discussion
> > that we've had many times in the past.
> >
> >
> >
> >
> >
> >

-- 
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Giles Heron    Principal Network Architect    PacketExchange Ltd.
ph: +44 7880 506185              "if you build it they will yawn"
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