A10 Thunder™ CGN product line of Carrier Grade Networking gateways provide high-performance, highly transparent address and protocol translation that allows enterprises and service providers to extend their IPv4 network connectivity, while simultaneously making the transition to IPv6. Thunder CGN is our premier CGN product line delivering performance scalability up to 150 Gbps, offering the broadest range of form factors (physical, virtual and hybrid) and integrated distributed denial of service (DDoS) protection.

The Thunder CGN product line is built upon our Advanced Core Operating System (ACOS®) platform-a Symmetric Scalable Multi-Core Processing (SSMP) software architecture that delivers high performance and a wide range of deployment options for enterprise and carrier networks.

  • Extend IPv4 connectivity: Today's networks may be prepared to scale bandwidth capacity, but the rapid proliferation of Internet-connected devices has depleted the available IPv4 address space. Service providers, and enterprises have to meet the demand for connectivity expansion, but an immediate transition to IPv6 is not a realistic option. Carrier Grade NAT (CGN/CGNAT) enables customers to extend connectivity with standards-based IPv4 translation, preserving their existing IPv4 address allocation and their investment in IPv4-based infrastructure. CGNAT allows organizations to extend the lifetime of their current IPv4-based infrastructure, save cost and gain time to plan their IPv6 transition strategy.

  • Broad transition options: The Thunder CGN product line provides a wide choice of technologies that enable a smooth transition to IPv6 networks and devices as they are deployed. The IPv6 transition technologies allow an organization's applications and users to connect to the entire Internet, regardless of what IP version is used. There are many IPv6 transition technologies, which allow customers to serve different IPv6 network transition needs simultaneously. Interplay between the transition technologies on a single high-performance platform allows for cost-effective transition.

  • Application reliability: The Thunder CGN product line provides the high connection reliability by using application layer gateways (ALGs) and other important features to ensure that applications can remain addressable and operate transparently through address translation. High availability (HA) allows established sessions to be maintained during failover completely unnoticeable to end users. The high reliability of Thunder CGN provides organizations a cost-effective solution to meet service-level agreements (SLAs) and user satisfaction goals.
  • A10 Thunder CGN devices enable critical services in highly efficient hardware- and software-based form factors. The Thunder CGN product line maximizes rack space efficiency. The combination of high performance in a small form factor results in lower OPEX through significant lower power usage and cooling requirements.

    Network and Telecom Equipment

    Network and Telecom Equipment


    A10 Thunder CGN provides many advanced features for enterprises and carriers to extend IPv4 connectivity and to transition to IPv6 Internet connectivity. As network addressing and IPv6 transition architectures can vary greatly across and within an organization, customers need a solution that provides the broadest support for industry standards and addresses different address and protocol translation requirements simultaneously. The Thunder CGN product line provides a broad array of standards-compliant IPv4 extension and IPv6 transition technologies integrated within our high-performance, ACOS-based physical, virtual and hybrid appliances.


    The Thunder CGN product line provides advanced CGNAT functions to easily mitigate IPv4 address exhaustion and extend the life of an IPv4 network infrastructure. There are many features available within our CGNAT solution to meet the needs for organizations that are looking into CGNAT.

    Advanced CGNAT functions: CGNAT provides a standards-based mechanism to reclaim existing public IPv4 address space, using address and port translation. This allows for a network where private addresses inside the network are translated using a pool of public, routable IP addresses on the outside network. The ratio of private to public IP addresses can be high, resulting in a significant amount of reclaimed public IPv4 address space. Performing CGNAT for many simultaneous users requires large amounts of computing and memory resources to maintain user state information. The A10 Thunder CGN product line leverages the highly efficient ACOS platform architecture, which provides high-performance CGNAT scaling in very efficient form factors. The Thunder CGN product line provides support for up to 256 million concurrent sessions in a single RU form factor, as well as unprecedented session setup and teardown rates. Competing solutions require a large chassis product with multiple application blades to achieve similar performance.

    Advanced logging features: Local governments often mandate that network operators be able to trace a user's connection details at a given moment in history, which can be complicated when scaling out large IPv4 CGNAT solutions. Thunder CGN offers many techniques to enhance the logging detail or reduce the volume of logs, in order to reduce logging infrastructure requirements. For example, there are log compression features that significantly reduce the amount of data needed to describe a log event. Deterministic or fixed Network Address Translation (NAT) makes it possible to virtually eliminate translation logs; the user details of a connection can easily be derived via a simple algorithm.


    Since IPv6 is not backwards compatible with IPv4, various solutions are available to achieve full connectivity, regardless of source or destination IP protocol.

    Prevalent protocol connectivity: Transition technologies such as Dual-Stack Lite (DS-Lite) allow network operators to run an IPv6-only access network, while IPv4-only devices can still connect to the Internet using softwires (also referred to as tunnels) through the IPv6-only infrastructure. Light Weight 4 over 6 (LW4o6) or IPv6 Rapid Deployment (6rd) provide similar behavior, allowing alternate IP versions access through the network.

    Ensure IPv6 client access to IPv4 content: IPv6 was not built to be backward compatible with IPv4, complicating the deployment of IPv6 clients. NAT64/DNS64 solves this problem by allowing IPv6-only devices to access IPv4-only content, thus enabling clients to access the majority of the Internet today.

    Interplay for phased transition: Networks often require different transition technologies to be deployed simultaneously. Thunder CGN products allow you to deploy each transition technology concurrently, for example starting with CGNAT to immediately mitigate IPv4 address exhaustion, and then phasing in NAT64/DNS64 to enable IPv6 clients to access the IPv4 Internet, when you are ready.


    Even though the OSI network layer principle should ensure separation between the application and network behavior, this is not always the case. Many applications rely on network transport information to operate, which can lead to problems when just the network portion is translated. Connection reliability is also crucial for applications that need to be available at all times.

    CGNAT transparency: Advanced CGNAT features such as Endpoint Independent Mapping (EIM) and hairpinning provide predictable NAT behavior, and a transparent end user experience. User quotas allow public IP port usage to be fairly distributed between end users, and that viruses and malware, for example, can't exhaust the resources for other users.

    Application Layer Gateways (ALGs): For network operators, it is critical to ensure connectivity for all application services and users. ALGs within CGNAT ensure that protocols such as FTP, TFTP, RTSP, PPTP, SIP, ICMP, H.323 and DNS remain functional. Many legacy NAT implementations do not provide this level of transparency.

    Stateful session synchronization (hitless failover): When deployed in HA mode, the A10 Thunder CGN units synchronize active sessions, so when a failover occurs, the sessions will be maintained and end users will not be aware that a failover has occurred. This prevents users from having to restart a large download, for example, and increases user satisfaction.

    In addition, Thunder CGN appliances offer integrated distributed denial of service (DDoS) protection for CGN devices offering public facing services to prevent huge volumes of multi-vector DDoS attack traffic. Integrated DDoS features are available on all A10 Thunder CGN appliances and specialized Thunder SPE appliances, which leverages a hardware-assisted Security and Policy Engine (SPE) to enforce security policies at ultra-high speed. Together, these CGN software and hardware features ensure maximum uptime of network resources to process subscriber traffic.

    Network and Telecom Equipment







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