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NE40E V800R010C10SPC500 Feature Description - Network Reliability 01

This is NE40E V800R010C10SPC500 Feature Description - Network Reliability

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Application Scenarios for the Uninterruptible Service Technology

Application Scenarios for the Uninterruptible Service Technology

Uninterruptible service technologies are typically applied on provider edges (PEs), especially when customer edges (CEs) are connected to a carrier network. As shown in Figure 10-7, if a PE fails or maintenance operation needs to be performed on a PE (for example, a software version needs to be upgraded), the PE performs an AMB/SMB switchover, which causes service interruptions. Uninterruptible service technologies can be deployed to resolve this issue.
Figure 10-7 NSR application on a carrier network
Generally, CEs do not have the GR helper capability. NSR uses an internal mechanism to ensure that the routing protocol and adjacency statuses are consistent on the control planes of the AMB and SMB. With NSR, no adjacencies need to be reestablished when an AMB/SMB switchover occurs. AMB/SMB switchovers are transparent to neighbors. Therefore, neighbors do not need to support NSR. NSR can be deployed to ensure service continuity on the network shown in Figure 10-7.
NOTE:
If CEs have the GR helper capability, GR can be deployed on the CEs to ensure service continuity.
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Updated: 2019-01-03

Document ID: EDOC1100055045

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