OpenWrt replaces kernel and rootfs, the OEM bootloader usually remains (exceptions exist, e.g. the belkin rt3200 or some lantiq devices), as do some 'data' partitions (such as wifi calibration data).
OpenWrt replaces kernel and rootfs, the OEM bootloader usually remains (exceptions exist, e.g. the belkin rt3200 or some lantiq devices), as do some 'data' partitions (such as wifi calibration data).