CCR1072-1G-8S+, CR2216-1G-12XS-2XQ and CRS518-16XS-2XQ-RM units are equipped with two redundant Hot Swap 12v 150W AC/DC power supplies - if one of them goes out of order, second one will take over.
Hot Swap 12v 150W AC/DC power supplies for CCR1072-1G-8S/CCR2216-1G-12XS-2XQ and CRS518-16XS-2XQ-RM are now available for purchase separately. You can replace them on the go to ensure zero downtime, no need to even restart the router