Single-site or local 1+1 redundancy of the VSR-NRC relies on extending the communication of the NSP-PROXY to synchronize the contents of the TE-DB and LSP-DB between the primary VSR-NRC (VSR-NRC-A) and the secondary VSR-NRC (VSR-NRC-B). This is supported by the CPROTO sync channel running between the two VSR-NRCs.
Figure 1. VSR-NRC 1+1 Single-Site Redundancy
