The MPLS WG Archive

["Adrian Farrel" <adrian@olddog.co.uk>]

I am sorry, I am having some trouble understanding the requirement. Please see below.

 

> > > >       (2) At an intermediate LSR, accounting of traffic through
> > > >           LSPs for each pair of ingress to egress.
> > > SP uses merging LSP and need per-lsp basis accounting, they will do it
> > > over merging LSP.
> >But downstream of a merge point you cannot tell which ingress the data
> >came from.
>
> Yes.
> Therefore, it should be a requirement.
> More clearly, if the LSP operated as merged end-to-end, which ingress the
> data came from is only needed in the point of per-lsp accounting router

> (maybe intermediate-lsr).

 

Consider the following network.

 

A--B

    \         |--H

     E--F--G--|

    /         |--I

C--D

 

Data flows from A and C to H and I. An LDP LSP is provided from B and D to G.

 

1. When you say you want to account traffic

   through an LSP for each pair of ingress

   to egress, do you mean

   a. source and destination pairs

      {A, H}, {A, I}, {C, H}, {C, I}

   b. LSP ingress egress pairs

      {B, G}, {C, G}

2. At which LSRs do you want to be able

   to perform this accounting?

   a. Ingresses B and D

   b. Egress G

   c. Merge point E

   d. Transit point F

 

Thanks for helping me to understand what it is you want to achieve.

 

Adrian

 

 

 

>
>
>
> >Re-reading this, I suspect you mean "incoming segment" or "upstream
> >segment" where you
> >have written "ingress".
> >
> >Adrian
>
> Of course I don't mean "segment".
>
>
>
> --
> Satoru Matsushima
>
>
>
>
>