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NE20E-S V800R010C10SPC500 Feature Description - VPN 01

This is NE20E-S V800R010C10SPC500 Feature Description - VPN
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PW APS Application

PW APS Application

Figure 8-42 shows typical pseudo wire (PW) automatic protection switching (APS) networking. The network comprises an access ring and an aggregation ring. A BTS/NodeB is connected to a cell site gateway (CSG). A BSC/RNC is connected to an RSG. Primary and secondary PWs are established between a CSG and an RSG. The PWs can be either single-segment PWs (SS-PWs) or multi-segment PWs (MS-PWs). A BTS/NodeB communicates with a BSC/RNC through a mobile broadband (MBB) network.

PW APS is deployed on the bearer network to improve reliability. APS instances are configured on CSGs and RSGs, and the primary/secondary pseudo wire (PW) protection group is associated with each APS instance. APS instructs the source and destination ends to implement bidirectional protection switching in the same manner to achieve delayed switching and wait-to-restore (WTR) for PW protection.

Figure 8-42 Typical PW-APS networking

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Updated: 2019-01-03

Document ID: EDOC1100055135

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