Instead of OpenStack Block Storage service, Shared File Systems service requires interaction with Networking service. The first of all, it because share services should have a possibility to manage share servers on its own. Also, lots of shared file systems provides have own access control systems and requires network connectivity with some external auth providers, like LDAP, Kerberos, or Microsoft Active Directory. So, management share services base on such back end needs some interacting with Networking service.
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