The MPLS-OPS Archive

[Adithya Bhat <adithya@sasken.com>]

Hemant,

This IP true in case of IP,  were 5 tuple u mentioned can be used.
But if specific to RSVP-TE ( lsp-tunnel draft ) section 2.1 says

" when   RSVP and MPLS are combined, a flow or session  can  be  defined
with
greater  flexibility  and generality.  The ingress node of an LSP can use a
variety
of means to determine  which  packets  are  assigned  a  particular  label. "

" Variety of means " = 5 Tuples.

Once the label has been allocated to this LSP,  label value
( which is meore general ) can be used to classify the packets ????
( may it be either ingress or core ).

-Adithya




"Hemant P. Kelkar" wrote:

> Hi Aditya,
>
> Before classification, the 5 tuple Source IP + Destination IP + Service +
> Source Port + Destination Port or  the tuple Source IP + Destination IP
> determines the flow.
> After classification since the flow is denoted by the label assigned,
> there is no further need of classification.
>
> --
> Hemant
>
> Date: Thu, 27 Sep 2001 21:41:24 +0530
> From: Adithya Bhat <adithya@sasken.com>
> To: Hemant P. Kelkar <hemant@cyberspace.org>
> Cc: krishnakanth.rao@mail.cominsights.com, mpls-ops@mplsrc.com,
> mpls@UU.NET
> Subject: Re: label values
>
> Hi Hemant,
>
> Once a label is assigned to a set of packets, the label effectively
> defines
> the "flow" through the LSP,
> So will it not be better to say that, packets will be classified based on
> the
> Labels ??
>
> -Adithya
>
> "Hemant P. Kelkar" wrote:
>
> > Hi Krishnakanth,
> > Label values are of local significance only , limited significance
> between
> > the neighbour routers (LSRs). Hence, there may be same label values on
> two
> > different LSPs in the MPLS Domain.
> > Packets are classified into different FECs using a flow classifier e.g.
> > same source/destination IP addresses, and service types. (TCP port
> > numbers).
> >
> > --
> > Hemant

--
=========================================================
Adithya S Bhat                                     Tel : 080-5355501
Software Engineer,                                Ext : 8251
CTG Datacom,                                       Fax : 5351133
Sasken Communication Technologies.  http://www.sasken.com/
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