Benefits of active forwarding and active gateway
The enabling of active forwarding and active gateway reduces latency in the network by bypassing the ISL link for north-south and south-north traffic, resulting in one less hop.
When active forwarding is enabled, the north-south unicast traffic bypasses the ISL link for Agg1 and Agg2. Just as the south-north traffic bypasses the ISL link for Agg1 and Agg2 when active gateway is enabled, as shown in the following figure.