The VVoIP system and LAN design must provide segmentation and protection of the VVoIP system core device management traffic and interfaces such that role based access and traffic flow can be properly controlled.

The management interface on any system/device is its Achilles heel. Unauthorized access can lead to complete corruption of the system or device, causing the loss of availability (denial-of-service), integrity, and information or communications confidentiality. As such management interfaces and the management traffic they transmit or receive must be protected. The most effective method for providing this protection is to establish a separate dedicated network for the purpose of managing systems, devices, and network elements. Such a network is typically called an out-of-band (OOB) management network. Such networks can be expensive to establish depending on the geographical placement of the managed devices. This protection can also be afforded the management interfaces and traffic on the same network as the production traffic uses, but the process is more difficult and protection requirements more stringent. This method is called In-Band management. When using in-band management, the most effective method for providing management interface and traffic protection is to establish a separate dedicated management VLAN on the production network. Another method for protecting management traffic is the use of secure protocols and encryption. The Network Infrastructure STIG defines the requirements for both in-band and OOB management. In-band management is permitted for the typically geographically disbursed network elements using a dedicated management VLAN and logically separate management interfaces on each NE. In general the management of VVoIP core systems and devices must follow the NI STIG/checklist guidance. This means that these systems/devices can be managed via an OOB management network or an in –band VLAN. While this is the case, the this management access must be segregated from all other management VLANs on the network. The purpose of the separate VVoIP management VLAN or OOB network is to provide for separation of access in support of separation of duties between the data network or server SAs and the VVoIP system SAs. In some organizations these SAs are from different departments or just have different duties that don’t require that they have access to all devices on the network. The VVoIP management VLAN or OOB network may be accessed from the general LAN management VLAN/OOB network or other management VLANs or networks via a controlled ACL, gateway. A firewall may be needed if crossing enclave boundaries.