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Networking Solution Solution Overview

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Updated:July 8, 2019

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Updated:July 8, 2019
 

 

Introducing an entirely new era in networking

What if you could give time back to IT? Provide network access in minutes for any user or device to any application-without compromise?

Cisco Software-Defined Access (SD-Access) is the industry’s first intent-based networking solution for the Enterprise built on the principles of Cisco’s Digital Network Architecture (Cisco DNA). Cisco SD-Access provides automated end-to-end segmentation to separate user, device and application traffic without redesigning the network. Cisco SD-Access automates user access policy so organizations can make sure the right policies are established for any user or device with any application across the network. This is accomplished with a single network fabric across LAN and WLAN which creates a consistent user experience anywhere without compromising on security.

Benefits

     Consistent management of wired and wireless network provisioning and policy

     Automated network segmentation and group-based policy

     Contextual insights for fast issue resolution and capacity planning

     Open and programmable interfaces for integration with third-party solutions

Cisco SD-Access solution overview

Cisco SD-Access enables IT transformation by improving operational effectiveness, enhancing the workforce experience and increasing security and compliance. Building this next-generation solution involved some key foundational elements, including:

     Controller-based orchestrator

     Network fabric

     Programmable switches

Controller-based networking: Traditional networking focuses on per-device management, which takes time and creates many complexities. This approach is prone to human errors. Cisco SD-Access uses a modern controller architecture to drive business intent into the orchestration and operation of network elements. This includes the day-0 configuration of devices and policies associated with users, devices and endpoints as they connect to the network. The controller provides a network abstraction layer to arbitrate the specifics of various network elements. Additionally, the Cisco DNA Center controller exposes northbound Representational State Transfer (REST)-based APIs to facilitate third-party or in-house development of meaningful services on the network.

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Figure 1.           

Cisco SD-Access overview

Why Cisco SD-Access?

There are many challenges today in managing the network because of manual configuration and fragmented tool offerings.

Manual operations are slow and error-prone and these issues are exacerbated due to the constantly changing environment with more users, devices and applications. With the growth of users and different devices types coming into the network, configuring user credentials and maintaining a consistent policy across the network is more complex. If your policy is not consistent, there is the added complexity of maintaining separate policies between wired and wireless. As users move around the network, locating the users and troubleshooting issues also become more difficult. The bottom line is that the networks of today do not address today’s network needs.

Network fabric: With a controller element in place, you can consider building the network in logical blocks called fabrics. The Cisco SD-Access Fabric leverages Virtual Network Overlays in order to support mobility, segmentation and programmability at very large scale. The Virtual Network Overlay leverages a control plane to maintain the mapping of end-points to their network location up to date as end-points move around the network. Separation of the control plane from the forwarding plane reduces complexity, improves scale and convergence over traditional networking techniques. The Cisco SD-Access Fabric enables several key capabilities, such as the host mobility regardless of volume of moves and size of the network, Layer 2 and Layer 3 segmentation, and wireless integration. Other capabilities include intelligent services for application recognition, traffic analytics, traffic prioritization and steering for optimum performance and operational effectiveness.

Modern device software stack: To build a modern infrastructure, Cisco is equipping its existing and future devices with advanced capabilities to enable full lifecycle management while being open, standards-based and extensible. These key technologies include (1) automated device provisioning, incorporating well-known functions such as zero-touch provisioning, and Plug and Play; (2) open API interface; (3) granular visibility, using telemetry capabilities such as NetFlow; and (4) seamless software upgrades with live software patching.

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These challenges are deeply rooted within network deployment and operations as noted below:

Network deployment

     Setup or deployment of a single network switch can take several hours due to scheduling requirements and the need to work with different infrastructure groups. In some cases, deploying a batch of switches can take several weeks.

     Security is a critical component of managing modern networks. Organizations need to appropriately protect resources and make changes efficiently in response to real-time needs. Tracking VLANs, Access Control Lists (ACLs) and IP addresses to ensure optimal policy and security compliance can be challenging.

     Disparate networks are common in many organizations, as different systems are managed by different departments. The main IT network is typically operated separately from building management systems, security systems and other production systems. This leads to duplication of network hardware procurement and inconsistency in management practices.

Network operations

     Limited change management:

One of the standard operational activities in running a network is to upgrade software and configurations periodically. Whenever such a change is required on a typical network, the sheer logistics mean the task could take over 6 months.

     Productivity:

Every business strives to provide a high-quality communication experience to optimize employee productivity. However, this effort has been difficult and time-consuming with current models. Experience has shown that changes in quality of service can take several months to plan and implement, while lack of implementation causes performance issues in business-critical applications.

     Slow resolution of issues:

The significant size and complexity of networks under the current network management paradigm mean that whenever a failure occurs, pinpointing and resolving the issue can take a great deal of effort and time. There is also a lot of data that is being collected but not properly correlated to understand the various contexts of network and user behaviors.

Solution components

The core components that make up the SD-Access solution are:

     Cisco DNA Center

     Cisco Identity Services Engine (ISE)

     Network platforms

Ordering information

Please refer to the Cisco SD-Access ordering guide for detailed information.

Key features

See Table 1 for a list of the key features of Cisco SD-Access 1.x

Table 1.             Cisco SD-Access 1.x (update 1.3) Key Features

Feature

Description

Fabric infrastructure

  Automated external connectivity handoff using Virtual Routing and Forwarding Lite (VRF-Lite), and Border Gateway Protocol (BGP)
  Border automation with existing BGP configurations
  SD-Access for Distributed Campus
  SD-Access Extension for IoT (General Availability in 1.3)
  Support for an internal border for DC connectivity
  Connectivity between hosts in the fabric and an external Layer 2 domain
  Fabric-in-a-box wherein a device can be the edge, border and control nodes simultaneously
  Support for Broadcast, Link-local multicast traffic in the overlay
  Ability to assign a fabric edge switchport as a trunk to facilitate server connectivity
  Support for Native Multicast
  Cisco Catalyst 9200 Series Switches
  Automatic checks on a device for fabric-readiness and fabric-compliance
  Support for Layer 2 Border Handoff on Catalyst 6000 Series Switches
  Enhancements in Underlay LAN Automation
  API support for adding and deleting borders
  Support for IPv6 Wired and Wireless (AireOS WLC only) endpoints (New in 1.3)
  Support for Dual Stack (IPv4 and IPv6) automated external connectivity handoff using VRF-Lite and BGP (New in 1.3)
  Automated workflow to configure extended nodes (New in 1.3)
  Support for Port Channel between Fabric edge and Extended Node uplinks (New in 1.3)
  Cisco Catalyst 9300L Series Switches as Fabric Edge, Border, and Control Plane node (New in 1.3)
  Cisco Catalyst 9600 Series Switches as Fabric Border and Control Plane node (New in 1.3)

Fabric control plane

  Demand-based overlays with LISP-based control plane
  Control plane co-located with fabric border or standalone
  Resiliency with support for multiple LISP control plane nodes

Fabric Assurance

  KPIs, 360 views for Client, AP, WLC, and Switch
   Underlay & Overlay Correlation
   Device Health: Fabric Border and Edge; CPU, Memory, Temperature, Linecards, Modules, Stacking, PoE power, TCAM
   Dataplane Connectivity: Reachability to Fabric Border, Edge, Control Plane, and DHCP, DNS, AAA
   Policy: Fabric Border and Edge Policy, ISE/PxGrid Connectivity
   Client Onboarding: Client/Device DHCP & DNS, Client authentication & authorization

Security

  Host Onboarding Enhancement – IBNS 2.0

Segmentation

  Network segmentation and group-based segmentation
  Group assignment capabilities using multiple authorization methods with Identity Services Engine integration

     Static: IP to group mapping, subnet to group mapping, port to group mapping

     Dynamic

    MAC address based

    Passive identity (Active Directory)

    802.1X based (open, closed)

    WebAuth

    Device Profiling

    Device Posture assessment

  Default permit for all intra-VN communications between Groups
     Option to define custom deny between groups within a VN
  Default deny for all inter-VN communications between Groups
     Option to define custom permit between groups at firewall
  Add/remove/modify virtual networks and group-based policies, independent of network devices or location of user
  Ability to have the same VLAN name across sites for a common policy
  Application Centric Infrastructure policy plane integration
   Share policy groups between SD-Access networks and ACI data centers
   Consistent security policy management across the enterprise by leveraging group based policy together with application context anywhere in the network

Fabric Wireless

  Enterprise wireless support
  VXLAN support at access point
  Distributed data plane for higher wireless performance
  Seamless roaming within the fabric site
  Wireless Guest with ISE (CWA)
  Wireless Guest Support on Separate Guest Border/Control Plane and Wireless Guest Support as separate VN on Enterprise Border/Control Plane
  Same SSID for Traditional and Fabric on same WLC (Mixed Mode)
  WLC SSO
  Wireless Multicast
  Enable Fabric for brownfield WLC
  Advanced RF profiles (Simplified RF provisioning with default RF profile)
  Advanced SSID (Band-select, Hidden-SSID, Band for SSID, per site PSK support)
  Zero Touch Provisioning (ZTP) for Access Point
  Common WLC for Fabric/Non-Fabric per Site
  OTT Guest support using an Anchor WLC
  Greenfield support for embedded wireless on Catalyst 9300 Series Switches in two topologies
   Collocated Border and Control Plane
   Fabric-in-a-box
  Greenfield support for Cisco Catalyst 9800 Series
   9800-40, 9800-80, and 9800-CL (private cloud for VMWare ESXi, KVM, and Cisco ENCS)
   9800 embedded wireless on Cisco Catalyst 9300 switches
   9800 embedded wireless on Cisco Catalyst 9400 switches and Cisco Catalyst 9500 switches (New in 1.3)
  Support for WiFi 6 Access Points: Cisco Catalyst 9115AX, Cisco Catalyst 9117AX, Cisco Catalyst 9120AX, and Cisco AIR-AP1840 (New in 1.3)

Fabric security

  Control plane protection against Distributed Denial of Service (DDoS) attacks
  Routing Locator (RLOC) authentication with control plane
  RLOC source address spoofing prevention

Management

See the list of management features in Cisco DNA Center 1.3

Technology partners

  IPAM-Infoblox, Bluecat
  Firewalls-Cisco ASA, Cisco Firepower ® Threat Defense
  Visibility-LiveAction
  Application Centric Infrastructure (New in 1.2.10)

For more information on all the key features of SD-Access 1.x, refer the Cisco DNA Center release notes.

SD-Access 1.x Hardware and Software Compatibility Matrix is available at the following location: https://www.cisco.com/c/en/us/solutions/enterprise-networks/software-defined-access/compatibility-matrix.html.

Cisco SD-Access use cases

Building on the foundation of industry-leading capabilities, Cisco SD-Access can now deliver key business-driven use cases that truly realize the promise of a digital enterprise while reducing the total cost of ownership (Table 2).

Table 2.             Cisco SD-Access use cases

Use case

Details

Benefits

Security and segmentation

  Onboard users with 802.1X, Active Directory, and static authentication
  Group users with Cisco TrustSec (security group tags)
  Automate VRF configuration (lines of business, departments, etc.)
  Traffic analysis using AVC and NetFlow is further enhanced using Encrypted Traffic Analytics (ETA)
  Share SGTs and EPGs between SD-Access networks and ACI data centers
  Reduced time to provision network segmentation and user groups
  Foundation to enforce network security policies
  Ability to detect and intercept threats at line rate (not samples) from the center to the last mile, including all devices on the network edge
  Enables consistent security policy groups for enterprise wide role based access control

User mobility

  Single point of definition for wired and wireless users
  Seamless roaming for wireless
  Distributed data plane for wireless access
  Simplified guest provisioning for wireless
  Management of wired and wireless networks and users from a single interface (Cisco DNA Center)
  Ability to offload wireless data path to network switches (reduce load on controller)
  Scalable fabric-enabled wireless with seamless roaming across campus

Guest access

  Define specific groups for guest users
  Create policy for guest users’ resource access (such as Internet access)
  Simplified policy provisioning
  Time savings when provisioning policies

IoT integration

  Segment and group IoT devices
  Define policies for IoT group access and management
  Device profiling with flexible authentication options
  Simplify deployment of IoT devices
  Reduce network attack surface with device segmentation

Monitoring and troubleshooting

  Multiple data points on network behavior (syslog, stats, etc.)
  Contextual data available per user and device
  Significantly reduce troubleshooting time
  Use rich context and analytics for decision making

Cloud/data center integration

  Identity federation allows exchange of identity between campus and data center policy controllers
  Administrator can define user-to-application access policy from a single interface
  End-to-end policy management for the enterprise
  Identity-based policy enforcement for optimized ACL utilization
  Flexibility when enforcing policy at campus or data center

Branch integration

  Create a single fabric across multiple regional branch locations
  Simplified provisioning and management of branch locations
  Enterprisewide policy provisioning and enforcement

Services

Accelerate your journey to a digital-ready network with Cisco Software-Defined Access services.

Cisco Services provides expert guidance to help you achieve a streamlined operational model across wired and wireless environments at a lower cost. With proven experience, best practices, and innovative tools, Cisco Services works with you to easily manage, scale, and secure your Cisco SD-Access solution. By choosing from a comprehensive lifecycle of services-including advisory, implementation, optimization, and technical services-you can move to a secure and automated unified network with ease and confidence. Learn more.

     Develop an SD-Access architectural strategy and roadmap that aligns to business needs

     Migrate with high performance, security, and reliability

     Achieve operational excellence with optimization

     Maintain reliability and accelerate the ROI of your Cisco SD-Access solution

     Reduce disruption with proactive monitoring and management

     Equip your IT staff with knowledge and training

Giving IT time back with Cisco SD-Access

Cisco SD-Access gives IT time back by dramatically reducing the time it takes to manage and secure your network and improving the overall end-user experience.

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How to get started with Cisco SD-Access

     Review the business and technical decision maker presentations

     Read the Cisco SD-Access Technical Solution white paper

     Ask your sales representative for a product demo

Cisco Capital

Flexible payment solutions to help you achieve your objectives

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