Final answer:
The 'set aggregate-weight redundant' command in IPSec VPN configuration is used for configuring VPN load balancing by assigning weights to VPN tunnels to optimize network traffic distribution.
Step-by-step explanation:
The command set aggregate-weight redundant in IPSec VPN configuration typically configures VPN load balancing. This setting is used to assign weights to different VPN tunnels in a load-balanced setup. The weighted load balancing allows for traffic to be distributed across multiple tunnels based on the assigned weight, which may be an indication of the tunnel's bandwidth or reliability. The goal of such configuration is to optimize the use of network resources and ensure high availability by directing more traffic through the more capable or reliable paths.