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SDN and SD WAN and SD Access and DNA Center

SDN and SD WAN and SD Access and DNA Center

I have read about SDN and SD WAN.  if I understand They both are based on Centralized Control Plane.

So if I have  the Traditional Local Area Network  made up of Access/Distribution/Core   Layers,  and when I want to Implement SDN Technology , at what layer should I integrate SDN.
in other words if there is a hardware on which SDN is installed on, where should that hardware be located ?

SD WAN is WAN Technology , if I want to implement that technology  where should  I put the hardware that holds the SD WAN software.

if you can briefly give the    difference between SDN , SD-Access, SD WAN, DNA Center that might also help clear up the Terminology confusion.

THank you
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atlas_shudderedSr. Network Engineer
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Commented:

SDN - Broad term used to encompass the abstraction of traditional networking into a more traffic aware, automated and resilient logical architecture.  The dream of SDN is to provide more intelligent traffic managment and transport, end to end, within the logical network architecture.  The architecture is built around a context and service based philosophy rather than the traditional address/boundary philosophy of traditional networking.  This is intended to a more efficient, secure and functional network overall with treatment of the network as a whole rather than individual segments and areas.  There is a great deal more to it than this but, I think that is a reasonable foundation.


SD-Access - Cisco's implementation of SDN in the Campus LAN, including elements of NAC and host/port based security, QOS/COS to the host, etc.


SD-WAN - A broad term used to describe, in general, the treatment of WAN networks within the SDN framework.  Generally with a goal toward greater agility in traffic shaping, policing and management, more flexible treatment in the secure handling and transit of data and the intention of reducing dependencies on leased line technologies.


DNA Center - One of Cisco's orchestration tools - primary focus is toward the SD-Access solution set.  Used to manage the SD environment through API, SNMP, hook, etc.  Think network managemet automation.

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Commented:
DNA Center is a Cisco product https://www.cisco.com/c/en_uk/products/cloud-systems-management/dna-center/index.html

SDWAN is a subset of SDN.

There are some "legacy" hardware systems that can be used with some SD components, such as there were some HP switches that could be loaded with OpenFlow firmware, but most SDN systems would be a forklift upgrade.

What do you mean by "holds the SD WAN software" ?

Author

Commented:
Sorry for the delay, as I was very busy..
Any diagram online that can show where those elements fit in.
I found this diagram below, but I am not sure where SD Access and SD WAN will fit in there.

a
Sr. Network Engineer
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Commented:
the drawing you posted describes the architecture of the SD overlay architecture and where it’s individual functional components reside.  It isn’t aimed at reflecting where the differing area solutions would be deployed.  the names themselves indicate the where.

SDWAN is deployed across your physical WAN topology and manages traffic flows edge to edge. it is primarily an east west technology.

SDAccess deploys at the traditional Access layer of the local area and manages/governs host connectivity and communications on or across or through the LAN.  this can encompass both East-west and north-south traffic and can also function independently or in concert between two or more separate and distinct physical LANs.

Author

Commented:
Thank you

Author

Commented:
Thank you

Author

Commented:
Thank you