Re: [mpls-linux-general] Mpls dlv operation

[James R. L. <jl...@mi...>]

On Wed, Feb 16, 2005 at 07:13:49PM +0530, ram...@wi... wrote:
>=20
> Hi,
> Ok,tell me this one.
>=20
> In transit,through mplsadm I added an incoming label.so the default
> operation is pop and peek.Now an packet comes with that label but no
> binding is there.
> Now what will happen whether the packet will dropped or it will send
> to layer 3 for forwarding.

OK.  Now I understand your question.  A 'peek' past the last label is the
same as a 'dlv', the packet is delivered to layer 3.

The reason this semantic was added was an upstream LSR will not always know
if the label it allocats will be used by itself or as part of a labelstack.
Thus by always doing a pop/peek either the next label in the stack will be
searched for, or the packet will be send to the layer 3 protocol bound to
the ILM.

BTW you should switch to the newest mpls-linux and start using the 'mpls'
utility, as opposed to using mplsadm2.

> Thanks in advance.
>=20
> Regards
> Ramesh selvaraj
>=20
> -----Original Message-----
> From: James R. Leu [mailto:jl...@mi...]
> Sent: Tuesday, February 15, 2005 8:32 PM
> To: Ramesh Selvaraj (WT01 - TELECOM SOLUTIONS)
> Cc: mpl...@li...
> Subject: Re: [mpls-linux-general] Mpls dlv operation
>=20
> On Tue, Feb 15, 2005 at 03:35:49PM +0530, ram...@wi...
> wrote:
> > Hi,
> >
> > In transit,through mplsadm I added an incoming label.so the default
> > operation is pop and peek.Now an packet comes with that label but no
> > binding is there.
> > Now what will happen whether the packet will dropped or it will send
> > to ip layer and iprouting will take place?
>=20
> I do not understand your question.
>=20
> > What is the use of dlv operation?
>=20
> To explicitly force an ILM to pop all labels and send the packet to
> layer
> 3 for forwarding.
>=20
> > Thanks in advance.
> >
> > Regards
> > Ramesh selvaraj
> >
> >
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>=20
> --
> James R. Leu
> jl...@mi...
>=20
>=20
>=20
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--=20
James R. Leu
jl...@mi...