To update the attributes of a load balancer, use the neutron lbaas-loadbalancer-update command shown here:
neutron lbaas-loadbalancer-update
[--description DESCRIPTION]
[--name NAME]
LOADBALANCER
The --description argument is optional and can be used to update the description of the load balancer.
The --name argument is optional and can be used to update the name of a load balancer.
The LOADBALANCER argument specifies the name or ID or the load balancer to update.