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The Nokia layer 2 switch must enable Ethernet Connectivity Fault Management (ETH-CFM) to protect against one-way connections.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-283689NOKI-L2-000170SV-283689r1204095_ruleCCI-000366medium
Description
In topologies where fiber optic interconnections are used, physical misconnections can occur that allow a link to appear to be up when there is a mismatched set of transmit/receive pairs. When such a physical misconfiguration occurs, protocols such as Spanning Tree Protocol (STP) can cause network instability. Enabling ETH-CFM is the standard and most effective way to protect a layer 2 service against one-way (unidirectional) connections on a Nokia 7750 SR. The constant, bidirectional exchange of Continuity Check Messages (CCMs) provides an "always-on" monitoring system. It ensures that connectivity is healthy in both directions, detecting silent failures that would be missed by on-demand tests such as a loopback (ping).
STIGDate
Nokia Service Router OS 25.x Layer 2 Switch Security Technical Implementation Guide2026-06-15

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (8) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CFG-01Configuration Management Program
1.00
END-01Endpoint Device Management (EDM)
1.00
END-04Malicious Code Protection (Anti-Malware)
1.00
END-06Endpoint File Integrity Monitoring (FIM)
1.00
MON-01Continuous Monitoring
1.00
MON-01.7File Integrity Monitoring (FIM)
1.00
CFG-02Secure Baseline Configurations
0.50
CFG-02.7Approved Configuration Deviations
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (100) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-12Session Termination
1.00
AC-16(1)Dynamic Attribute Association
1.00
AC-17(1)Monitoring and Control
1.00
AC-2Account Management
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(11)Usage Conditions
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-24(1)Transmit Access Authorization Information
1.00
AC-25Reference Monitor
1.00

+90 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.4.1
1.00
3.4.2
1.00
CCI1 mapping
CCI-000366
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (5) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

DE.CM-09
1.00
PR.PS-01
1.00
PR.DS-10
0.50
PR.PSPlatform Security
0.50
PR.PS-05
0.50

Who does this work

10 NICE work roles and 9 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-283689r1204095_chk)

Verify the ETH-CFM configuration for the service access point (SAP) in the virtual private local area network service (VPLS) appears as shown in the example below. - show service id 10 sap 1/1/c3/10 detail Eth-Cfm MEP Configuration Information Md-index : 3 Direction : Down Ma-index : 1 Admin : Enabled MepId : 10 CCM-Enable : Enabled If ETH-CFM is not configured to protect against one-way connections, this is a finding.

Fix Text (F-88159r1204094_fix)

Configure the ETH-CFM maintenance domain and bind the Maintenance Endpoint (MEP) to the SAP to be monitored. Use the CCMs to detect possible unidirectional issues. Configure ETH-CFM domain information: - configure eth-cfm domain <domain id> format none level <level> - association 1 format icc-based name <name> - bridge-identifier bridge-name <vpls service name> - back - remote-mepid <mep id> Apply to the SAP within VPLS: - configure service vpls <id> - sap <sap id> eth-cfm mep <mep id> domain <domain id> association <index> - ccm-enable - no shutdown