This document discusses hybrid cloud networking challenges and solutions. It presents typical web application deployments on-premises and in the cloud. Architectural challenges with hybrid clouds include performance, reliability, and security. Implementation challenges involve using switched versus routed networks and managing IP addresses, routes, and network appliances across environments. The document proposes two approaches for hybrid cloud networking - a routed virtual private cloud using routing and firewalls, and a switched virtual private cloud using virtual switches and tunnels to simplify connectivity while maintaining security and performance.

1. SVForum Cloud and
Virtualization SIG
Hybrid Cloud Networking
Chris Marino
vCider

2. Typical WebApp Deployment
75.23.45.18
L/B
10.0.0.16/28
Web Web Web Web
10.0.1.16/28
App App
10.0.2.16/28
Lots of Other Sync, EAI, Mirror, etc. DB
Enterprise Apps
SVForum Cloud and Virtualization SIG Slide 2

3. Cloud App Deployment
L/B
Web
Web
Web Web
App
App
Sync, EAI, Mirror, etc. DB
SVForum Cloud and Virtualization SIG Slide 3

4. Hybrid Cloud: Stretched LAN
L/B
Web
Web
Web Web
App
App
Sync, EAI, Mirror, etc. DB
SVForum Cloud and Virtualization SIG Slide 4

5. Hybrid Cloud: Tethered App
L/B
Web
Web
Web Web
App
App
Sync, EAI, Mirror, etc. DB
On Prem
SVForum Cloud and Virtualization SIG Slide 5

6. Hybrid Cloud:Cloud Bursting
L/B L/B
Web
Web
Web
Web Web
App
App
App
App
Sync, EAI, Mirror, etc. DB
SVForum Cloud and Virtualization SIG Slide 6

7. Hybrid Cloud Networking
• Architectural Challenges
– Performance
• Latency v. Consistency
– Reliability
• Failover, DR/HA strategies
– Security
• Switched (E’net frames) v. Routing (IP Packets)
• Firewalls, Encryption, Access Controls, etc.
• Implementation Challenges
– Switched v. Routed
• Bridging (simple) v. Routing (not so simple)
• Application Requirements (broadcast/multicast, discovery, failover, etc.)
– IP addresses
• Dynamic v. Static
• Routable v. Non-routable
– Routes to and from systems
• Network Appliances and Leaky Abstractions
• Complexity and Agility
– How does all this impact primary objectives of cloud efforts?
SVForum Cloud and Virtualization SIG Slide 7

8. Routed Virtual Private Cloud
Switched LANs v. Routed Cloud
Security
Performance
Complex?
/28
R
/26 /28
Switch
R F/W G/W R R
On Premises /28
R
Cloud Provider
SVForum Cloud and Virtualization SIG Slide 8

9. Switched Virtual Private Cloud
Switched LANs v. Routed Cloud
Security
Performance
Simpler?
vSwitch
vSwitch
Tun Tun
On Premises
Cloud Provider
SVForum Cloud and Virtualization SIG Slide 9

10. Questions?
Contact:
Chris Marino
chris@vcider.com
info@vcider.com
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SVForum Cloud and Virtualization SIG Slide 10