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Cisco NX OS Switch L2S Security Technical Implementation Guide

Version

V3R3

Release Date

Dec 8, 2025

SCAP Benchmark ID

Cisco_NX-OS_Switch_L2S_STIG

Total Checks

22

Tags

network
CAT I: 1CAT II: 17CAT III: 4

This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.

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Checks (22)

V-220675HIGHThe Cisco switch must uniquely identify all network-connected endpoint devices before establishing any connection.V-220676MEDIUMThe Cisco switch must authenticate all VLAN Trunk Protocol (VTP) messages with a hash function using the most secured cryptographic algorithm available.V-220677MEDIUMThe Cisco switch must be configured for authorized users to select a user session to capture.V-220678MEDIUMThe Cisco switch must be configured for authorized users to remotely view, in real time, all content related to an established user session from a component separate from The Cisco switch.V-220679MEDIUMThe Cisco switch must authenticate all endpoint devices before establishing any connection.V-220680LOWThe Cisco switch must have Root Guard enabled on all switch ports connecting to access layer switches and hosts.V-220681MEDIUMThe Cisco switch must have BPDU Guard enabled on all user-facing or untrusted access switch ports.V-220682MEDIUMThe Cisco switch must have STP Loop Guard enabled.V-220683MEDIUMThe Cisco switch must have Unknown Unicast Flood Blocking (UUFB) enabled.V-220684MEDIUMThe Cisco switch must have DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources.V-220685MEDIUMThe Cisco switch must have IP Source Guard enabled on all user-facing or untrusted access switch ports.V-220686MEDIUMThe Cisco switch must have Dynamic Address Resolution Protocol (ARP) Inspection (DAI) enabled on all user VLANs.V-220687LOWThe Cisco switch must have Storm Control configured on all host-facing switchports.V-220688LOWThe Cisco switch must have IGMP or MLD Snooping configured on all VLANs.V-220689MEDIUMThe Cisco switch must enable Unidirectional Link Detection (UDLD) to protect against one-way connections.V-220690MEDIUMThe Cisco switch must have all disabled switch ports assigned to an unused VLAN.V-220691MEDIUMThe Cisco switch must not have the default VLAN assigned to any host-facing switch ports.V-220692MEDIUMThe Cisco switch must have the default VLAN pruned from all trunk ports that do not require it.V-220693MEDIUMThe Cisco switch must not use the default VLAN for management traffic.V-220694MEDIUMThe Cisco switch must have all user-facing or untrusted ports configured as access switch ports.V-220695MEDIUMThe Cisco switch must have the native VLAN assigned to an ID other than the default VLAN for all 802.1q trunk links.V-220696LOWThe Cisco switch must not have any switchports assigned to the native VLAN.