Re: draft-mannie-ccamp-gmpls-lbm-tdm-00.txt

[Maarten Vissers <mvissers@lucent.com>]

Eric, Dimitri,

Forgot to mention that this feature should work in switched as well as
non-switched networks. The latter are of course making up 99.99999% of the
networks.

Regards,

Maarten

Maarten Vissers wrote:
> 
> Eric, Dimitri,
> 
> Your draft-mannie-ccamp-gmpls-lbm-tdm-00.txt contribution states:
> 
> "   One drawback of LCAS is that it requires changing the transport
>    plane since new overhead bytes are used. In consequence, new ASICs
>    must be used at both termination ends. On the contrary, GMPLS LBM
>    is done purely in the control plane. It does not require any new
>    ASICs and is backward compatible with the existing hardware. "
> 
> The objective of LCAS is to support a hitless (no single bit error in the client
> signal) modification of the connection bandwidth over which the client signal is
> transported.
> 
> LCAS is the 3rd element in the package "virtual concatenation, GFP and LCAS",
> and doesn't require new hardware which isn't already required to support virtual
> concatenation and GFP. I.e. the new ASICs that will support virtual
> concatenation and GFP will also support LCAS.
> 
> To get the hitless behaviour that is required, you need a synchronisation
> protocol build into the bit level transport. LCAS will do this. GMPLS or ASON
> will never be able to do this.
> 
> Regards,
> 
> Maarten
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