The core router within the managed network has not been configured to provide preferred treatment for management traffic that must traverse several nodes to reach the management network.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17837	NET1008	SV-19098r1_rule	ECSC-1	Low

Description
When network congestion occurs, all traffic has an equal chance of being dropped. Prioritization of network management traffic must be implemented to ensure that even during periods of severe network congestion, the network can be managed and monitored. Quality of Service (QoS) provisioning categorizes network traffic, prioritizes it according to its relative importance, and provides priority treatment through congestion avoidance techniques. Implementing QoS within the network makes network performance more predictable and bandwidth utilization more effective. Most important, since the same bandwidth is being used to manage the network, it provides some assurance that there will be bandwidth available to troubleshoot outages and restore availability when needed. When management traffic must traverse several nodes to reach the management network, management traffic should be classified and marked at the nearest upstream MLS or router. In addition, all core routers within the managed network must be configured to provide preferred treatment based on the QoS markings. This will ensure that management traffic receives preferred treatment (per-hop behavior) at each forwarding device along the path to the management network. traffic.

Description

When network congestion occurs, all traffic has an equal chance of being dropped. Prioritization of network management traffic must be implemented to ensure that even during periods of severe network congestion, the network can be managed and monitored. Quality of Service (QoS) provisioning categorizes network traffic, prioritizes it according to its relative importance, and provides priority treatment through congestion avoidance techniques. Implementing QoS within the network makes network performance more predictable and bandwidth utilization more effective. Most important, since the same bandwidth is being used to manage the network, it provides some assurance that there will be bandwidth available to troubleshoot outages and restore availability when needed. When management traffic must traverse several nodes to reach the management network, management traffic should be classified and marked at the nearest upstream MLS or router. In addition, all core routers within the managed network must be configured to provide preferred treatment based on the QoS markings. This will ensure that management traffic receives preferred treatment (per-hop behavior) at each forwarding device along the path to the management network. traffic.

STIG	Date
Perimeter L3 Switch Security Technical Implementation Guide	2017-06-27

Details

Check Text ( C-19313r1_chk )
When management traffic must traverse several nodes to reach the management network, ensure that all core routers within the managed network have been configured to provide preferred treatment for management traffic. This will ensure that management traffic receives guaranteed bandwidth at each forwarding device along the path to the management network. Verify that a service policy is bound to all core or internal router interfaces. The service policy should be configured to place management traffic in the appropriate forwarding class. The classes must be configured to receive the required service.

Check Text ( C-19313r1_chk )

When management traffic must traverse several nodes to reach the management network, ensure that all core routers within the managed network have been configured to provide preferred treatment for management traffic. This will ensure that management traffic receives guaranteed bandwidth at each forwarding device along the path to the management network. Verify that a service policy is bound to all core or internal router interfaces. The service policy should be configured to place management traffic in the appropriate forwarding class.
The classes must be configured to receive the required service.

Fix Text (F-17757r1_fix)
When management traffic must traverse several nodes to reach the management network, ensure that all core routers within the managed network have been configured to provide preferred treatment for management traffic.