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Reference Architecture | Dynamic L4-L7 Service Insertion with Cisco ACI and A10 Thunder ADC

Solution Architecture

The solution architecture for a next-generation data center consists of A10 Thunder ADC and Cisco ACI

working together to build an application-centric networking infrastructure. Cisco ACI provides centralized,

application-driven policy automation and management for all layers of the networking infrastructure. Thunder

ADC integrates with the Cisco ACI open ecosystem model and provides dynamic L4-L7 application networking

services that can be automated and managed by Cisco ACI APIC. This architecture oﬀers maximum ﬂexibility

and accelerates application deployments by simplifying and optimizing the deployment process for new

applications, both traditional and custom. This automated approach is well suited for DevOps environments,

which rely heavily on programmability of application services, networking and security policies. Multi-tenancy

is a key aspect of the ACI fabric, which enables managed service providers to deploy applications in a secure

and isolated environment, without bothering about the physical infrastructure. The ACI fabric is comprised of

the following key components that build the underlying network infrastructure to support applications.

1. Cisco APIC – provides centralized policy management and control

2. Cisco Nexus 9000 Series Switches – provide leaf and spine fabric infrastructure

3. L4-L7 application and security service devices through open ecosystem

The open ecosystem model of ACI allows it to integrate with stateless hardware and software systems

where the APIC programs, manages and conﬁgures the physical and virtual compute, network and storage

infrastructure. The APIC pushes conﬁguration to the switches, routers, ﬁrewalls and load balancers through

RESTful API calls that allow the data center administrator to replace any failed hardware or system with a similar

one without losing any state information or conﬁguration (the conﬁguration resides centrally with the APIC).

Figure 2 shows a high level overview of the Cisco ACI architecture with the APIC managing and interacting

with diﬀerent elements of the data center. This application-centric model can be used by DevOps teams,

for example, who could use Cisco APIC as the centralized controller to programmatically conﬁgure network

infrastructure, application services and security policies through device-speciﬁc REST API calls – all at the

same time. This approach can greatly reduce the time it takes to plan, implement and provision networking

infrastructure to deploy new applications in the data center.

Physical

Networking

Hypervisors

and Virtual

Networking

L4–L7

Services

Multi DC

WAN and

Cloud

Storage Compute

ACI

ACI ACI ACI ACI

ACI

ACIACIACI

APIC

DevOps

Figure 2: Cisco ACI architecture

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