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Re: Substrate Resouces

by Keren Bergman :: Rate this Message:

John,

I agree with Stu's comments. Perhaps we can define a "link" physical
component that includes resources such as 100G. This would enable
construction of (sub)-networks from the available components and their
resources - to the extent that these resources can be partitioned. I would
argue to take out the "network" component since it's a higher level entity -
it should be possible to build it from the components we define. The
resources (restoration, protection, QoS, etc.) can be provided via the
components.

Best,

Keren

-----Original Message-----
From: substrate-wg-bounces@... [mailto:substrate-wg-bounces@...]
On Behalf Of John Jacob
Sent: Friday, November 02, 2007 8:38 AM
To: substrate-wg@...
Subject: Re: [substrate-wg] Substrate Resouces

Stu,

You made some good points and raised good questions. I would like to know
how others on this list feel about this. As a point of clarification, the
selection of physical/logical/synthetic in the current version was primarily
to stimulate discussion. It is quite likely that several of these
assignments are confusing or incorrect. I will incorporate your input into
the master version to be redistributed after the initial wave of
discussions.

Thanks,
John

stuart.d.elby@... wrote:

> John,
>
> I have the same question; I am not sure what the boundary is between
> physical and logical as a result of sliceability. Building on
> Masanori's example, ff a network element has a CPU running routing
> protocol stacks and those processing threads can be partitioned into
> virtual router threads, then I have the basis for virtual routing
> functions (VRFs) which are logical routers built by 'slicing' a
> physical CPU. Is this what you were thinking when you labeled the columns?
>
> Another observation is that you have labeled 'Ports' as logical
> constructs. I do agree that this is a very important type of port we
> need to consider, but let's not loose sight of the physical (e.g.
> 100G) ports that will be used to connect these platforms to the
> underlying fiber facilities. I suggest that we consider "line cards"
> and "switch ports" physical entities, and "logical (switch) ports"
> logical entities to avoid confusion. The physical binding of a switch
> port "a" to a fiber facility to a switch port "b" would be a "physical
> circuit" or "connection". All other bindings of logical ports would be

"synthetic"

> paths as you have already defined.
>
> -Stu
>
> -----Original Message-----
> From: substrate-wg-bounces@...
> [mailto:substrate-wg-bounces@...] On Behalf Of Masanori Takashima
> Sent: Friday, November 02, 2007 12:57 AM
> To: John Jacob
> Cc: substrate-wg@...
> Subject: Re: [substrate-wg] Substrate Resouces
>
> Hi, John,
>
> Let me know what do you mean by Sliceable at column F.
>
> I guess that Sliceable means that whatever an entry in column B
> consists of a set of finer grained resources. For example, CPU is
> Sliceable because CPU consists of a set of CPU usage, where CPU usage
> is a resource.
>
> Best regards,
> Masanori
>
>
>
> _______________________________________________
> substrate-wg mailing list
> substrate-wg@...
> http://lists.geni.net/mailman/listinfo/substrate-wg
>
>

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