To update a pool, use the neutron lbaas-pool-update command shown here:

neutron lbaas-pool-update
[--admin-state-up {True,False}]
[--session-persistence type=TYPE [,cookie_name=COOKIE_NAME]
| --no-session-persistence]
[--description DESCRIPTION]
[--name NAME]
[--lb-algorithm {ROUND_ROBIN,LEAST_CONNECTIONS,SOURCE_IP}]
POOL 

The --admin-state-up argument is optional and can be used to change the state of a pool.

The --session-persistence argument is optional and is used to modify the session persistence method and/or cookie type.

The --no-session-persistence argument is optional and is used to remove session persistence from the pool.

The --description argument is optional and can be used to update the description of the pool.

The --name argument is optional and can be used to update the name of the pool.

The --lb-algorithm argument is optional and is used to modify the load balancing algorithm used to distribute traffic among the pool members.

The POOL argument specifies the name or ID or the pool to update.