Quality of service (QoS) must be implemented on the underlying IP network to provide preferred treatment for traffic between the SDN controllers and SDN-enabled switches and hypervisors.
An XCCDF Rule
Description
<VulnDiscussion>With the network topology abstraction, the SDN controllers are able to determine how traffic should flow through network devices based on application data, business policy, bandwidth, and path availability. When updated link state information is provided by the network elements, the SDN controller must recalculate the optimized paths for network reconvergence and provide the new forwarding tables to the network elements. When network congestion occurs, all traffic has an equal chance of being dropped. QoS provisioning categorizes network traffic, prioritizes it according to its relative importance, and provides preferential treatment using various priority queuing techniques. Prioritization of both link state updates and control plane traffic must be implemented to verify that during periods of severe network congestion, the network can converge.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-87747r1_rule
- Severity
- Low
- References
- Updated
Remediation - Manual Procedure
Determine the paths in which SDN control and management plane traffic will flow between the SDN controllers and SDN-enabled switches and routers.
Configure each router and multilayer switch to impose preferred treatment for this traffic so it has priority over normal production traffic during periods of congestion.