The behavior of dual-site redundancy follows the single site redundancy procedures because only the active NRC-P can establish CPROTO channels to the pair of primary and secondary VSR-NRCs.
When the NRC-P in the secondary site becomes active, it attempts to establish a CPROTO global channel to both primary and secondary VSR-NRCs. Nokia recommends configuring the local VSR-NRC (VSR-NRC-B) as the primary VSR-NRC in the secondary site.