Title

The Juniper P router must be configured to enforce a Quality-of-Service (QoS) policy in accordance with the QoS GIG Technical Profile. (Cat III impact)

Discussion

Different applications have unique requirements and toleration levels for delay, jitter, bandwidth, packet loss, and availability. To manage the multitude of applications and services, a network requires a QoS framework to differentiate traffic and provide a method to manage network congestion. The Differentiated Services Model (DiffServ) is based on per-hop behavior by categorizing traffic into different classes and enabling each node to enforce a forwarding treatment to each packet as dictated by a policy. Packet markings such as IP Precedence and its successor, Differentiated Services Code Points (DSCP), were defined along with specific per-hop behaviors for key traffic types to enable a scalable QoS solution. DiffServ QoS categorizes network traffic, prioritizes it according to its relative importance, and provides priority treatment based on the classification. It is imperative that end-to-end QoS is implemented within the IP core network to provide preferred treatment for mission-critical applications.

Check Content

Review the router configuration and verify that it has been configured to enforce a QoS policy in accordance with the QoS GIG Technical Profile (GTP-0009). The router must be configured to use either configured or default Behavior Aggregate (BA) classifier on all interfaces as shown in the example below: class-of-service { … … … } interfaces { ge-0/0/1 { unit 0 { classifiers { dscp default; } } } ge-0/1/0 { unit 0 { classifiers { dscp default; } } } ge-1/0/1 { unit 0 { classifiers { dscp default; } } } ge-1/1/0 { unit 0 { classifiers { dscp default; } } } Note: The GTP QOS document (GTP-0009) can be downloaded via the following link: https://intellipedia.intelink.gov/wiki/Portal:GIG_Technical_Guidance/GTG_GTPs/GTP_Development_List If the router is not configured to enforce a QoS policy in accordance with the QoS GIG Technical Profile, this is a finding.

Fix Text

Configure all P router interfaces and PE core-facing interfaces to use a configured or the default BA classifier as shown in the example below. [edit class-of-service interfaces] set ge-0/0/1 unit 0 classifiers dscp default set ge-0/1/0 unit 0 classifiers dscp default set ge-1/0/1 unit 0 classifiers dscp default set ge-1/1/0 unit 0 classifiers dscp default Note: The GTP QOS document (GTP-0009) can be downloaded via the following link: https://intellipedia.intelink.gov/wiki/Portal:GIG_Technical_Guidance/GTG_GTPs/GTP_Development_List

Additional Identifiers

Rule ID: SV-217080r604135_rule

Vulnerability ID: V-217080

Group Title: SRG-NET-000193-RTR-000114

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.