Transcript The Seeds for Network Virtualization are Present in IP

Chris Koeneman
Vice President, Bluesocket Business Group
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ADTRAN Company Confidential
Who is ADTRAN?
 Leading provider of innovative
networking and communications
equipment
– ADTRAN solutions enable converged
voice, data, video, and Internet services
– Broad customer base with solutions
widely deployed by carriers and
businesses of all sizes, worldwide
ADTRAN Headquarters, Huntsville, AL
 Smart, reliable solutions for today’s communications networks
– 25 years of experience building innovative solutions supporting next generation
technologies
– Continued market leadership in key technologies from integrated access, DSL, and
VoIP to routing
 Dependable solutions for business and residential connectivity
– Entrepreneurial engineering capabilities
– Demonstrated financial competence
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ADTRAN – Carrier Networks Divsion
• Improve service provider access
infrastructure
• Increase services for business
& residential customers
• Broadband Access
• Ethernet Aggregation
• Optical Access
• Business Ethernet
Services
• Business Service Migration
• IPTV
• VoIP
• Mobile Backhaul
Exchange
Provider’s Access
Infrastructure
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ADTRAN – Enterprise Networks Division
• Value-based communication solutions
for Small & Medium Enterprises
• ADTRAN solutions enable:
• Branch Office Connectivity
• Internet Access
• Converged Access
• LAN Switching
• Wireless Access
• IP Telephony/VoIP
• Unified Communications
Business Customers
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 Bluesocket was a VC-backed company based in Boston
high tech corridor
 Bluesocket acquired by ADTRAN in August 2011
 Acquired for innovative application of network
virtualization to solve scale challenges in Wi-Fi networks
 Bluesocket remains as a business group in ADTRAN
 Bluesocket R&D remains in Burlington, MA, and has
more than doubled since the acquisition
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An Application Needs Both
Network
Compute
Dreams of
virtualization
Highly
virtualized
Want to expose the difference? Ask about Disaster Recovery
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Virtualization Starts Here
Physical Device
Service
Separation
Service is de-coupled from the asset on which it operates
Service is not described on, associated with, or limited by any physical asset
Once Service is isolated, it can be defined in independent software: SDN
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Server Virtualization and
Network Virtualization
But can the network be virtualized?
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But the Network is Different
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Understanding Network Virtualization
with a Venn Diagram
Built in California
Golden Gate
Bridge
Katy Perry
Currently sexy
Network
Virtualization
Success at least
partly due to
superior underlying
infrastructure
Incredible scale
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Seven Principles of Network
Virtualization
1. Independence from network hardware
2. Actually reproduce the network service model
3. Follow operational model of compute virtualization
4. Compatible with any hypervisor platform
5. Isolation between applications, physical network, and control plane
6. Cloud performance and scale
7. Programmatic network provisioning and control
Products and solutions adhering to these
principles are appearing on the market
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Server and Network Virtualization
Here’s What’s Evolving
 Compute and Network will become
more symmetrical
 Common set of software tools to both
set up both the compute side and
network side of an application
 A symbiotic relationship between
Compute and Network
 But can the network virtualize?
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The Seeds for Network
Virtualization are 40 years old
It starts with control plane separation
Is control plane separation something new?
SS7? What’s next?
A discussion of
rotary phones?
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The Seeds for Network Virtualization
are Present in IP Networks
• Separates functions
• End point
independence and
intelligence
• Tunneling options for
control information
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Define and Operate The Network in Software
SDN Central’s definition of Software-defined Networking (n) is:
A new approach to networking that allow network operators more control
of their infrastructure, allowing customization and optimization that
enables invention of and delivery of new types of network services.
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Wasn’t GMPLS going to unify the
control plane?
A good idea…
…that got way too
complicated
SDN has the potential to deliver on the promise of GMPLS
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What Happened to GMPLS and
derivatives such as GMPLS-TE?
Koeneman Law of Networking
Any networking protocol with an acronym that
exceeds four letters is doomed to irrelevance…
…unless it has a slash in it like TCP/IP
…or a mixture of small case with capital letters like vWLAN
SDN is often associated with network virtualization which is
also referred to as Network Functions Virtualization or NFV.
It is written as “SDN and NFV”. If it becomes SDNNFV, it’s
all over. If it becomes SDN/NFV, there’s a chance.
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Does SDN imply OpenFlow?
REST is a good example
OpenFlow is an example and
not a forgone conclusion.
May suffer from least
common denominator
problem while vendor specific
implementations excel
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Understanding SDN with a Venn
Diagram
Detected in large bodies of water
Loch Ness
Monster
Some say it
is mythical
Global Warming
Software Defined
Networks
Would change the
world if it really
gets loose
Data centers actually
encourage it
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SDN Far Fetched? Remember…
Someday, your network won’t be
switching circuits but rather handling
packets of various lengths.
1998
Someday, your network won’t be
made up of switches and routers
but instead virtual machines
controlling simple physical devices.
2013
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The Implication is Far Reaching
 Service agility
– Change the software to redefine
a service
 Cost effective scaling
– Control plane can be scaled
independently of the data plane
 Higher reliability
– Control plane interruption does
not affect the data plane
 Greater throughput
– Data plane device optimized for
throughput
Spiderman….
Seriously?
 But where do you start?
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Starting Point for Network Virtualization
 Access network
– This is where services are defined and
users are classified
– Take advantage of the service definition
advantage of network virtualization
– But which access network?
 Consider the Wi-Fi portion of the
access network
– Under tremendous scale pressure with the
number of Wi-Fi devices and usage
patterns
– Economic scaling is the hallmark of
network virtualization
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Wi-Fi comes to you in the form of
the WLAN
 Different approach than your
home Wi-Fi
 Common WLAN is an access
controller along with Wi-Fi
access points
 Access points simply bridge a
user from wireless to wired
 Access controller behaves as a
switch and performs all the
heavy lifting for the data
sessions and service definitions
 Antithesis of the principles of
network virtualization
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What is WLAN Virtualization?
vWLAN
Traditional WLAN
WLAN Controller
REST
APIs
Hypervisor
Access Points
Access Points
Management Plane
Management Plane
Control Plane
Control Plane
Data Plane
Data Plane
Physical / MAC Layer
Physical / MAC Layer
• Service definition and user control separate
from the data flow
• Access point optimized for data forwarding
• Service definition and user control in software
in a virtual machine
 Service definition and data flow
coupled at the controller
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Network Virtualization Applied to the
WLAN
 VPN, VLAN…Now think vWLAN
 Leverages three key assets
– Physical: Data Center
– Computing Infrastructure: Hypervisor
– Personnel: Application Programmers
If you are thinking this is
a vWLAN, you haven’t
been listening
 But it goes further…
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Centralized Cloud Control
 No need for physical controllers at each
site
NOC
 All users controlled and all APs
managed from NOC
 Data sessions remain distributed at
remote site
 One architecture serving public access,
WAN
managed services, and offload
Public Access
HotSpot
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Managed WLAN
enterprise customer
26
Cellular Offload
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Virtualization Enables Policing and Traffic
Shaping at the Edge
Data Center or
Network Operations
Center
Control plane scale a
function of data center
capacity
Traffic is prioritized at
the access point
Control
traffic
Groomed
traffic
LAN Switch
Back Up
NOC
Unwanted
Traffic
Unwanted traffic is turned away at the
access point and never enters the network
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Conclusion
 Network virtualization will make network service
definition symmetrical with application definition
 Network virtualization solutions are available
 An ideal target in the network is the access layer,
specifically the Wi-Fi access layer
 By applying network virtualization to the Wi-Fi
access layer, tremendous benefits are realized in
terms of economic scaling, high availability, cloud
control, and security
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Chris Koeneman
Vice President, Bluesocket Business Group of ADTRAN
[email protected]
+1 781 996 9689
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