Re: [Openstack] Neutron ML2 questions

2013-12-26 Thread Jay Pipes 

On 12/26/2013 08:41 PM, Li, Chen wrote:

Hi list,

I just read the presentation slides showcased in the Openstack Hongkong
summit, on “Openstack Neutron Modular Layer 2 Plugin Deep Dive”.

http://fr.slideshare.net/mestery/modular-layer-2-in-openstack-neutron

I have some questions, hope someone can help me.

Q1. P7 : there is a new feature “top of Rack switch control”, what is a
rack switch means ? Why ML2 can do top control of it ?


A networking device that typically lives at the top of a rack and 
performs routing (i.e. it acts as the default gateway) for hardware 
devices in that rack is called a top of rack switch or TOR [1]. When 
the phrase top of rack switch control is used, it means that Neutron's 
ML2 plugin can control that TOR switch directly via the switch's native 
management interfaces.


Best,
-jay

[1] 
http://bradhedlund.com/2009/04/05/top-of-rack-vs-end-of-row-data-center-designs/



Q2. P11: It said “Allows multiple mechanism drivers to access same
network simultaneously”, do we have some examples to explain this ?

Q3. P13, what steps should I do to achieve this kind of network ? Any
guide we have ?

Looking forward to your reply.

Thanks.

-chen



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Re: [Openstack] Neutron ML2 questions

2013-12-26 Thread Li, Chen 
But, why it is a new feature for ML2?
Can't other plugins do that ?

Thanks.
-chen
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Re: [Openstack] Neutron ML2 questions

2013-12-26 Thread Jay Pipes 

On 12/26/2013 09:45 PM, Li, Chen wrote:

But, why it is a new feature for ML2?

Can’t other plugins do that ?


When responding to a ML post from someone, please do not cut out the 
entire response, otherwise, as you can tell here, nobody can tell what 
you are referring to...


I don't know the answer to if/why TOR switch control is new to the ML2 
plugin.


Best,
-jay


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