Distributed Vlan for Provisioning in a distributed Layer 3 environment

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Sep 17th, 2009
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I was curious to know if anyone had any ideas on the best way to go about this..


We have moved to a layer 3 core and distribution layer in our datacenter, with layer 2 out to the access layer. We are now considering building a provisioning network for kickstarting linux boxes.


I would need the vlan for the provisioning network to live on pretty much every switch in the environment. In a pure layer 2 design, obviously this is quite easy to do. With the distributed layer 3 design, there is no layer 2 connectivity currently between different networks. Everything hits the distribution, then goes layer 3 to the core.


Obviously I could link all the distribution switches in a layer 2 ring setup, and trunk this vlan to all of them. I don't really like that idea. I would also like to keep layer 2 out of the core if possible.


I was curious if any one had designed such a setup..


Thanks!

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Giuseppe Larosa Sat, 09/19/2009 - 01:29
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Hello Cristopher,

I would do the following:

I would use the VRF lite concept to create a L3 separated routing table

I suppose that the requirement for a L2 vlan comes from the desire to keep these new boxes separarated.


VRF lite or MPLS VPN with the distribution nodes acting as PE nodes can be a good solution.


Hope to help

Giuseppe


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