The MPLS WG Archive

["Nagendra Singh Tomar" <nagendras@netbrahma.com>]

Yeah, actually I missed that point!
--tomar

On Tue, 12 Jun 2001 suchauhan@hss.hns.com wrote:

>
>
> hi nagendra!
>      In case we are using Loop Detection in a MPLS domain (or for that matter
> over an LSP) and then in the case considered above the Loop Detection when
> detected at a LSR shall be the first to detect it and hence it is before the
> loop has actually occurred further down the LSP. We have still not reached the
> receiver as this is an Intermediate LSP. Hence there should not be a loop if we
> send back a notification to the source.
>
> regards
> sumit
>
>
>
>
> Nagendra Singh Tomar <nagendras@netbrahma.com> on 06/12/2001 08:55:44 AM
>
> Please respond to nagendras@netbrahma.com
>
> To:   Bob Thomas <rhthomas@cisco.com>
> cc:   nagendras@netbrahma.com, Sumit Chauhan/HSS@HSS, mpls@UU.NET
>
> Subject:  Re: Error in RFC 3036??
>
>
>
>
> Bob!
>      I am sorry if I did'nt put it correctly, but by saying that the
> Loop Detected Notification might in turn Loop, I meant that since a loop
> was detected on the label request received, there is a very  high
> possibility that the return path (from the receiver of the label request
> to the sender of the Label request) for the notification message might as
> well loop so its better to silently discard it.
>
> Is'nt it because of this Bob ?
>
> regards
> tomar
>
>
> On Mon, 11 Jun 2001, Bob Thomas wrote:
>
> > Tomar,
> >
> > > If the node detects a loop in the label request message, the  its wise not
> > > to send the loop detected notification, because that might in turn loop
> >
> > Note that the Loop Detected Notification is not propagated by the
> > receiver, and therefore will not loop.
> >
> > Bob
> >
> >
> > > and make the network conditions worse. In the LRq.2 case the loop is not
> > > detected in the label request message so we are sure that the return path
> > > for the notification message has no loop, so it is safe to send a
> > > notification in that case.
> > >
> > > --tomar
> > >
> > > On Mon, 11 Jun 2001 suchauhan@hss.hns.com wrote:
> > >
> > > >
> > > >
> > > > yup sorry! LRq.4 it is. typo ;o)
> > > >
> > > >
> > > >
> > > >
> > > > "zze-PELLE Thierry StagiaireFTRD/DAC/ISS"
> <thierry.pelle@rd.francetelecom.fr> on
> > > > 06/11/2001 03:27:43 PM
> > > >
> > > > To:   Sumit Chauhan/HSS@HSS, mpls@UU.NET
> > > > cc:
> > > >
> > > > Subject:  RE: Error in RFC 3036??
> > > >
> > > >
> > > >
> > > >
> > > > > IMHO, should it not be
> > > > >      If Loop Detected , got to LRq.5
> > > >
> > > > LRq.4 and not LRq.5 I think....
> > > >
> > > >
> > > >
> > >
> > > --
> > >
> > >
> > >
> ------------------------------------------------------------------------------
> > >  Nagendra Singh Tomar
> > >
> > >  Residence:
> > >  369 KHB Colony
> > >  5th Block Koramangala
> > >  Bangalore 95
> > >  INDIA
> > >  Phone : 5524839
> > >  email : nagendras@netbrahma.com
> > >
> > >
> > > "Sometimes quantity becomes quality"
> > >                             --Gary Kasparov,
> > >  When he played against Deep Blue. He said this after looking at a
> > >  computer which found a forced mate in 249 in an endgame, after calculating
> > >  all the possible moves with only 5 pieces left on the board.
> > >
> ------------------------------------------------------------------------------
> > >
> >
>
> --
>
>
> ------------------------------------------------------------------------------
>  Nagendra Singh Tomar
>
>  Residence:
>  369 KHB Colony
>  5th Block Koramangala
>  Bangalore 95
>  INDIA
>  Phone : 5524839
>  email : nagendras@netbrahma.com
>
>
> "Sometimes quantity becomes quality"
>                             --Gary Kasparov,
>  When he played against Deep Blue. He said this after looking at a
>  computer which found a forced mate in 249 in an endgame, after calculating
>  all the possible moves with only 5 pieces left on the board.
> ------------------------------------------------------------------------------
>
>
>
>
>
>

--


------------------------------------------------------------------------------
 Nagendra Singh Tomar

 Residence:
 369 KHB Colony
 5th Block Koramangala
 Bangalore 95
 INDIA
 Phone : 5524839
 email : nagendras@netbrahma.com


"Sometimes quantity becomes quality"
                            --Gary Kasparov,
 When he played against Deep Blue. He said this after looking at a
 computer which found a forced mate in 249 in an endgame, after calculating
 all the possible moves with only 5 pieces left on the board.
------------------------------------------------------------------------------