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Reducing Network TiersFlattening the Network
Kevin Ryan
Director – Data Center Solutions
www.extremenetworks.com
The New Computer
Data center capacity, not server capacity, is the new metric
Consolidation
High Computational Density Physical Location Consolidation
Green
Efficient Power Management
Virtualization
On Demand Provisioning Hardware Independence / High Availability
Location Independence
Network / Storage Convergence
Data Center Trends
© 2010 Extreme Networks, Inc. All rights reserved.
A “Four Phase” Solution
NetworkTopology
ReduceNetwork
Tiers
Bandwidth andPerformance
Fixed andModularPlatforms
Robust andFlexibleStacking
Integration withVM Platforms
Provision1,000s ofSwitches
across MultipleSites
AutomatedConfiguration
NetworkProfiles for
VMs
Heterogeneous(Best-of-Breed)
support forVirtual
Machines
Network management
software, single pane of
glass
Direct Attach™
1G 10G 40G 100G
ApplicationAwareness &
Support
User GeneratedScripts
XML-enabledInfrastructure
Open APIs
Program &ApplicationIntegration
© 2010 Extreme Networks, Inc. All rights reserved.
A “Four Phase” Solution
NetworkTopology
ReduceNetwork
Tiers
Bandwidth andPerformance
Fixed andModularPlatforms
Robust andFlexibleStacking
Integration withVM Platforms
Provision1,000s ofSwitches
across MultipleSites
AutomatedConfiguration
NetworkProfiles for
VMs
Heterogeneous(Best-of-Breed)
support forVirtual
Machines
Network management
software, single pane of
glass
Direct Attach™
1G 10G 40G 100G
ApplicationAwareness &
Support
User GeneratedScripts
XML-enabledInfrastructure
Open APIs
Program &ApplicationIntegration
© 2010 Extreme Networks, Inc. All rights reserved.
Network Architecture Challenges
Growing Tiers from 2 or 3 to 5 Traditional network tiers
Core, distribution, access
Blade Switch Tier
Typically used instead of pass through to address cabling challenges
Virtual Switch Tier
Each tier adds:
Oversubscription
Latency
Power
Heterogeneity across and between switching tiers
Management overhead
Conflicting best practices
Flat Layer 2 versus segmented
MAC address explosion
Driven by Virtualization and flatter networks
© 2010 Extreme Networks, Inc. All rights reserved.
Network boundary between switch and server has blurred
Switching at multiple levels
Virtual switchNIC cardsBlade switchesNetwork switchesDistributed virtual switches
Coexistence of different virtual switch models a challenge
Virtualization: A Networking Problem
© 2010 Extreme Networks, Inc. All rights reserved.
The “Direct Attach” Data Center
Virtualization and Blade switches have introduced complexity to the network Additional 1 or 2 tiers
Connect servers directly into EoRchassis Leverage high fan out I/O modules
Leverage high-density MRJ21 connectors
Eliminate blade switch
Eliminate ToR switch
Simplify cable management
Collapse multiple tiers in the data center Reduce latency
Reduce oversubscription
Simplify management
Reduce power
© 2010 Extreme Networks, Inc. All rights reserved.
Standard Data Center Architecture
Sample 12 Rack DC Network will have 5 Layers!
• 384 vSwitches
• 24 Blade Switches
• 12 TOR Switches
• 2 Agg Switches
• 2 Core Switches
A total of 424 Switches!!!
© 2010 Extreme Networks, Inc. All rights reserved.
Blade Chassis
VSwitch
Blade Chassis
Blade Chassis
Blade Chassis
12 Racks
Blade Switch
TOR Switch
Aggregation Switch
Core Switch
384 Blade Servers
VSwitch
VMVM
Server Virtualization: A Networking Problem
Data Center Core
VM1 VM2
vSwitch
Today’s Inter-VM Switching
Who manages and troubleshoots the virtual switch?• Vswitch tools owned by server administrators• Requires networking expertise and network
coordinationVirtual switch heterogeneity leads to
complexityProblem of scale
• Virtual switch in every server leads to explosion of managed switches in data center
Troubleshooting and security challenges• No network visibility into inter-VM traffic
Inconsistency of policy between physical and virtual switches• VM sprawl becoming a challenge
© 2010 Extreme Networks, Inc. All rights reserved.
VM2
Direct Attach Enabled Switch
Host: Fedora 12Hypervisor: QEMU-KVM
Guest OS: UbuntuActive applications:• gnome-system-monitor
for network and CPU utilization
• tcpdump to monitor attack traffic from VM1
VM1
Guest OS: UbuntuActive applications:• gnome-system-monitor
for network and CPU utilization
• hping to generate DoS attack targeted at VM2
Inter-VM traffic is transmitted and received on the same network physical port. VM2 CPU and network utilization severely impacted, due to DoS attack.
CLEAR-Flow enabled to dynamically provision/block DoS traffic. VM2 CPU and network utilization reverts to healthy.
VM2
Direct Attach: Eliminate the vSwitch “Virtually” Reducing Network Tiers
© 2010 Extreme Networks, Inc. All rights reserved.
Direct Attach – “Physically” Reducing Network Tiers
High fan-out modules 96 ports on a single I/O module
Up to 768 ports in one chassis
No oversubscription –Up to 128Gbs per slot
MRJ 21 cabling 6:1 cabling reduction
Go straight from Blade Server directly to Aggregation switch
Eliminate multiple physical network tiers Blade switch
ToR switch
© 2010 Extreme Networks, Inc. All rights reserved.
A “Four Phase” Solution
NetworkTopology
ReduceNetwork
Tiers
Bandwidth andPerformance
Fixed andModularPlatforms
Robust andFlexibleStacking
Integration withVM Platforms
Provision1,000s ofSwitches
across MultipleSites
AutomatedConfiguration
NetworkProfiles for
VMs
Heterogeneous(Best-of-Breed)
support forVirtual
Machines
Network management
software, single pane of
glass
Direct Attach™
1G 10G 40G 100G
ApplicationAwareness &
Support
User GeneratedScripts
XML-enabledInfrastructure
Open APIs
Program &ApplicationIntegration
© 2010 Extreme Networks, Inc. All rights reserved.
Forward-looking Statements
This presentation contains forward-looking statements that
involve risks and uncertainties, including statements regarding
our expectations as to products, trends and our performance.
There can be no assurances that any forward-looking statements
will be achieved, and actual results could differ materially from
forecasts and estimates. For factors that may affect our
business and financial results please refer to our filings with the
Securities and Exchange Commission, including, without
limitation, under the captions: “Management’s Discussion and
Analysis of Financial Condition and Results of Operations,” and
“Risk Factors,” which is on file with the Securities and Exchange
Commission (http://www.sec.gov). We undertake no obligation
to update the forward-looking information in this release.
© 2010 Extreme Networks, Inc. All rights reserved.