Re: Substrate Resouces

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



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