Deleting broadcast domains
You can delete a broadcast domain by using System Manager when you no longer require the broadcast domain.
No subnets must be associated with the broadcast domain that you want to delete.
When you delete a broadcast domain, the ports that are associated with the broadcast domain are assigned to the default IPspace, and the MTU settings of the ports are not changed.
You cannot use System Manager to delete broadcast domains that are in the cluster IPspace.
You must use the command-line interface (CLI) instead.
Click Network > Broadcast Domains.
Select the broadcast domain that you want to delete, and then click Delete.
Select the confirmation check box, and then click Delete.