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NE40E V800R010C00 Feature Description - NAT and IPv6 Transition 01

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
NAT Deployment

NAT Deployment

Carrier-Grade NAT Deployment

  • Distributed NAT Deployment

    Distributed NAT deployment allows broadband remote access servers (BRASs) to implement NAT functions. The BRASs also function as CGN devices. Figure 3-27 shows a distributed NAT network.

    In a distributed NAT scenario, a CGN device is associated with the network access process for users that go online through a BRAS. The mature Remote Authentication Dial In User Service (RADIUS) user management mechanism on the BRAS helps the BRAS to implement various functions, such as user source tracing and NAT policy distribution to users. In addition, the CGN device is close to users. Compared with the integrated NAT scenario, the distributed NAT scenario allows for higher scalability. Therefore, distributed NAT is the mainstream CGN deployment mode.
    Figure 3-27  Distributed NAT networking
  • Integrated NAT Deployment

    Integrated NAT deployment allows a NAT service board to be installed on a core router (CR) or allows a NAT device to be connected to a CR to implement NAT functions. Figure 3-28 shows an integrated NAT network.

    Integrated NAT deployment is used in early times. In most cases, NAT devices are connected to CRs. Integrated NAT deployment is originally used on networks with a few users sparely scattered.
    Figure 3-28  Integrated NAT networking

Enterprise user NAT deployment

Figure 3-29 shows an enterprise network with NAT deployed. The NE40E are deployed at the network egress. Each NE40E is connected to a firewall that only performs attack defense. The NAT function configured on the NE40Es to process access services for the enterprise network and public network.

Figure 3-29  NAT deployment on an enterprise network
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Updated: 2018-07-04

Document ID: EDOC1100027155

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