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Re: Moving right along ... generalized-rsvp-te-05
Maarten,
>Markus, John, Lou, Manoj,
>
>I also still have a major issue to understand the switching type... or more
>precise I have the feeling it is too coarse and ill defined. Let me
>provide some more examples to evaluate:
>
>Frist Markus' network example... it will look like the following in reality
>
> R1 ------ OXC1 ------ OXC2 ------ R2
> OC-N OC-N OC-N
>
> OC-N trail
> |<------------------------------>|
>
> STS-Nc trail
> |<-------------------------------->|
>
> IP Link
>|<---------------------------------->|
>
>I assume that OXC1/2 are all optical cross connects which pass through the
>complete OC-N signals.
>
>In order to route IP packets between R1 and R2, you need to set up an OC-N
>trail between R1 and R2.
Correct.
(Stating the obvious) the Switching Type for that LSP will
be set to LSC.
> Once this is done, you need to set up a STS-Nc trail between
> R1 and R2. Once this is done you have an IP link with a bandwidth of 9 584
> 640 kbit/s established between R1 and R2.
> Now IP signals can flow between R1 and R2.
There is no need to establish an STS-Nc trail between R1 and R2 - the OC-N
LSP is sufficient.
>Now make the example a bit more complex and let me add a SONET cross
>connect in the chain.
>
> R1 ------ OXC1 ------ OXC2 ------ DXC1 ------ R2
> OC-N OC-N OC-N OC-N
>
> OC-N trail OC-N trail
> |<------------------------------>| |<------>|
>
> STS-Nc trail
> |<-------------------------------------------->|
>
> IP Link
>|<---------------------------------------------->|
>
>The physical interface in each case is an OC-N. The DXC1 is a SONET cross
>connect, which terminates the OC-N Section and Line layers and forwards the
>STS-Nc signal.
>
>What would the switching types be in this case when an LSP is requested
>between R1 and R2?
(stating the obvious) TDM.
Yakov.