Does any configuration need to be done as part of CPE provisioning to enable IWAN ?

You need to configure data export on CPEs. Data will be exported using Netflow/IPFIX towards eye.lo.

• The Exporter defines the source interface (LAN/WAN) and the destination IP address of the remote collector
• The Monitor attaches records and exporters to the devices interfaces to activate the monitoring. It also configures the cache maximum size (32k recommended for small branch routers to 200k for DCs) and strategy (Synchronized 5 minutes recommended).

You may configure one of the following options (see LLD for details): static LO Performance Monitors, custom LO EZPM, EZPM ‘application-performance’ profile, FNF, TNF.