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NE40E V800R010C10SPC500 Feature Description - Network Reliability 01

This is NE40E V800R010C10SPC500 Feature Description - Network Reliability
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Centralized NAT444 Inter-board Hot Backup Solution

Centralized NAT444 Inter-board Hot Backup Solution

On the network shown in Figure 11-10, if the BRAS and CGN functions cannot be integrated into one device, separately deploying a CGN device to the CR or SR is recommended. In this manner, CPEs can dial up through the BRAS, and the BRAS can allocate private IP addresses for the CPEs. Upon receipt of a packet from a PC, the CPEs perform the first NAT on the IP address of the PC, and the CGN device performs the second NAT on the CPEs. The NATed packets are then transmitted to the ISP core network through the CR. This solution is called centralized NAT444 inter-board hot backup because there are two NAT operations and the CGN function is centralized on the CR for inter-board hot backup.
Figure 11-10 Centralized NAT444 inter-board hot backup solution based on port pre-allocation
Updated: 2019-01-03

Document ID: EDOC1100055045

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