The organizations capacity planning must implement the full bandwidth in each of the dual-homed circuits to two DISN Service Delivery Nodes (SDNs) for the enclave with sufficient headroom to support surge conditions in time of crisis.

From Voice Video Policy Security Technical Implementation Guide

Part of SRG-POL-300368

Associated with: CCI-000471

VVSP-01-000064_rule The organizations capacity planning must implement the full bandwidth in each of the dual-homed circuits to two DISN Service Delivery Nodes (SDNs) for the enclave with sufficient headroom to support surge conditions in time of crisis.

Vulnerability discussion

Contingency planning for information systems is part of an overall organizational program for achieving continuity of operations for mission/business functions. Contingency planning addresses both information system restoration and implementation of alternative mission/business processes when systems are compromised. Performing contingency planning on hardware, software, and firmware development can be an effective means of achieving information system resiliency. Contingency plans reflect the degree of restoration required for organizational information systems since not all systems may need to fully recover to achieve the level of continuity of operations desired. Capacity planning is needed because different types of threats (e.g., natural disasters, targeted cyber attacks) can result in a reduction of the available processing, telecommunications, and support services originally intended to support the organizational missions/business functions. Organizations may need to anticipate degraded operations during contingency operations and factor such degradation into capacity planning. For Voice Video systems, contingency planning must also consider fire and emergency services (FES) requirements for life safety and Command and Control (C2) requirements mandating communications among top-level officials, especially during crisis conditions.

Check content

If the Voice Video system provides Assured Service (AS) and DISN Voice Precedence and connects to the DISN WAN for transport, this is applicable. Review the contingency plan for the Voice Video system. The organization must implement the full bandwidth in each of the dual-homed circuits to two DISN SDNs for the enclave with sufficient headroom to support surge conditions in time of crisis. Inspect the documentation for the access circuits and the bandwidth engineering study. Each circuit must be engineered to include additional bandwidth to support higher levels of both data and Voice Video communications in time of crisis. If the organizations capacity planning does not have documentation for the access circuits and the bandwidth engineering study, this is a finding. If each of the dual-homed circuits to two DISN SDNs for the enclave do not have sufficient headroom to support surge conditions in time of crisis, this is a finding.

Fix text

Document a bandwidth engineering study for each access circuit. Each circuit must be engineered to include additional bandwidth to support higher levels of both data and Voice Video communications in time of crisis. Develop and document a contingency plan for the Voice Video system that implements the full bandwidth in each of the dual-homed circuits to two DISN SDNs for the enclave with sufficient headroom to support surge conditions in time of crisis.

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