You can modify the bandwidth used by the EIP bound to the load balancer as required.
Dedicated load balancers: Click Elastic Load Balancers, locate the load balancer whose bandwidth you want to modify and click Modify IPv4 Bandwidth or More > Modify IPv6 Bandwidth in the Operation column (if the load balancer has an IPv6 address that has been added to a shared bandwidth).
Shared load balancers: Click Elastic Load Balancers, locate the load balancer whose bandwidth you want to modify and click Modify Bandwidth or Modify IPv4 Bandwidth in the Operation column (in regions where either dedicated load balancers or both shared and dedicated load balancers are available).
Select the bandwidth defined by the system or enter a value from 5 Mbit/s to 2,000 Mbit/s.
You can also change the bandwidth name.