Cisco Cisco UCS Director 4.0 White Paper

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© 2015 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. 
Page 7   
Application Infrastructure on Demand with Cisco UCS Director and Cisco Application Centric Infrastructure
March 2015
Application-centric networking is implemented through the Cisco Application Policy 
Infrastructure Controller (APIC). The Cisco APIC provides centralized access to all 
fabric information, optimizes the application lifecycle for scale and performance, and 
supports flexible application provisioning across physical and virtual resources. 
The APIC receives application-centric network profiles from Cisco UCS Director and 
synchronizes network container creation by pushing policies down to the leaf nodes. 
After a network container is established, the fabric maintains the configuration 
independently of the APIC, delivering an exceptionally reliable network environment. 
The combination of Cisco APIC and Cisco Nexus 9000 Series Switches provides:
• 
Policy-based networking: Cisco ACI provides policy-based network containers 
that are defined according to what applications need, created in terms that 
application developers understand, eliminating miscommunication between 
network specialists and developers.
• 
Automation: Cisco APIC automatically translates network profiles into the physical 
switch configurations needed to support communication between endpoint 
groups while providing secure isolation of each virtual network segment that it 
implements.
• 
Layer 4 through 7 services: Cisco ACI automatically inserts appropriate Layer 4 
through 7 services as needed between application tiers. For example, physical or 
virtual load balancers can distribute an incoming workload across a web server 
tier; likewise, physical or virtual firewall appliances can provide stateful packet 
filtering between the web and application server tiers.
• 
Massive scalability: The leaf-and-spine network can expand horizontally to 
incorporate a large number of endpoints, providing precisely the kind of scalability 
and high-performance you need to support the east-west traffic volumes typical 
of virtualized environments.
• 
A network that spans deployment units: The horizontally scalable network can 
be expanded to reach across what used to be barriers between deployment 
units, such as integrated infrastructure solutions, racks, rows, or pods. Cisco ACI 
encapsulation normalization can bring any device into your network, eliminating 
stranded resources and increasing utilization.
Public
Internet
Web Contract
Web 
EPG
Storage
EPG
Database
EPG
App
Server
EPG
App Contract
SQL Contract
St
orage Contract
ACL
Allow 22,
 80, 443 
from *
QoS
Class 5
Marking Gold
Redirect Load Balancer
Copy to None
ACL
Allow 22,
 8080,
from Web Servers
QoS
Class 5
Marking Gold
Redirect Firewall
Copy to None
ACL
Allow 1443
from App Servers
QoS
Class 5
Marking Gold
Redirect None
Copy to None
Public
Internet
Web Contract
Web 
EPG
Storage
EPG
Database
EPG
App
Server
EPG
App Contract
SQL Contract
St
orage Contract
ACL
Allow 22,
 80, 443 
from *
QoS
Class 5
Marking Gold
Redirect Load Balancer
Copy to None
ACL
Allow 22,
 8080,
from Web Servers
QoS
Class 5
Marking Gold
Redirect Firewall
Copy to None
ACL
Allow 1443
from App Servers
QoS
Class 5
Marking Gold
Redirect None
Copy to None
Public
Internet
Web Contract
Web 
EPG
Storage
EPG
Database
EPG
App
Server
EPG
App Contract
SQL Contract
St
orage Contract
ACL
Allow 22,
 80, 443 
from *
QoS
Class 5
Marking Gold
Redirect Load Balancer
Copy to None
ACL
Allow 22,
 8080,
from Web Servers
QoS
Class 5
Marking Gold
Redirect Firewall
Copy to None
ACL
Allow 1443
from App Servers
QoS
Class 5
Marking Gold
Redirect None
Copy to None
Public
Internet
Web Contract
Web 
EPG
Storage
EPG
Database
EPG
App
Server
EPG
App Contract
SQL Contract
St
orage Contract
ACL
Allow 22,
 80, 443 
from *
QoS
Class 5
Marking Gold
Redirect Load Balancer
Copy to None
ACL
Allow 22,
 8080,
from Web Servers
QoS
Class 5
Marking Gold
Redirect Firewall
Copy to None
ACL
Allow 1443
from App Servers
QoS
Class 5
Marking Gold
Redirect None
Copy to None
Public
Internet
Web Contract
Web 
EPG
Storage
EPG
Database
EPG
App
Server
EPG
App Contract
SQL Contract
St
orage Contract
ACL
Allow 22,
 80, 443 
from *
QoS
Class 5
Marking Gold
Redirect Load Balancer
Copy to None
ACL
Allow 22,
 8080,
from Web Servers
QoS
Class 5
Marking Gold
Redirect Firewall
Copy to None
ACL
Allow 1443
from App Servers
QoS
Class 5
Marking Gold
Redirect None
Copy to None
Public
Internet
Web Contract
Web 
EPG
Storage
EPG
Database
EPG
App
Server
EPG
App Contract
SQL Contract
St
orage Contract
ACL
Allow 22,
 80, 443 
from *
QoS
Class 5
Marking Gold
Redirect Load Balancer
Copy to None
ACL
Allow 22,
 8080,
from Web Servers
QoS
Class 5
Marking Gold
Redirect Firewall
Copy to None
ACL
Allow 1443
from App Servers
QoS
Class 5
Marking Gold
Redirect None
Copy to None
Public
Internet
Web Contract
Web 
EPG
Storage
EPG
Database
EPG
App
Server
EPG
App Contract
SQL Contract
St
orage Contract
ACL
Allow 22,
 80, 443 
from *
QoS
Class 5
Marking Gold
Redirect Load Balancer
Copy to None
ACL
Allow 22,
 8080,
from Web Servers
QoS
Class 5
Marking Gold
Redirect Firewall
Copy to None
ACL
Allow 1443
from App Servers
QoS
Class 5
Marking Gold
Redirect None
Copy to None
Web Server
Virtual Machine
Application
Server
Virtual Machine
Physical Database
Server
Storage Systems from
Leading Storage Vendors
Virtual Firewall
Appliance
Physical Content-
Load-Balancing
Appliance
Outside Network
Cisco Nexus 9500
Platform Switches
(Spine)
Cisco Nexus 9300
Platform Switches
(Leaves)
VXLAN
Tunnels
Policies
Pushed to
Leaf Nodes
by APIC
Encapsulation
Normalization
Each Switch Implements
Network Policies
Autonomously
Figure 2. Cisco ACI Implements a Leaf-and-Spine Architecture with Every Path Through 
the Fabric Encapsulated in a VXLAN Tunnel