both work , but only for outbound traffic from your router towards ISP.
For inbound traffic ISP has to configure the similar way in their router.
However in the first case, the default load sharing (per destination) is recommended only if you are running any real time applications (voice/video)over these links, which does not support per-packet load sharing.
Else I would suggest to go with second config per-packet load sharing, which gives perfect load-balancing of the traffic.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...