This read-create enumerated value indicates whether a master endpoint's slave is persistent or non-persistent, where a non-persistent slave configuration is considered a single-ended SPVC, and this setting is only meaningful when cwaChanRoutingMastership is true. An admin cares because this determines whether the connection's remote side is expected to be a fully provisioned, standing endpoint or something set up on demand only from this master side, which affects how the connection behaves if the peer is unreachable. For example, when provisioning a single-ended SPVC where only this switch's endpoint is explicitly configured, the admin would set this to nonPersistentSlave on the master endpoint.