| CISC-L2-000020 - The Cisco switch must uniquely identify and authenticate all network-connected endpoint devices before establishing any connection. | IDENTIFICATION AND AUTHENTICATION |
| CISC-L2-000030 - The Cisco switch must authenticate all VLAN Trunk Protocol (VTP) messages with a hash function using the most secured cryptographic algorithm available. | IDENTIFICATION AND AUTHENTICATION |
| CISC-L2-000040 - The Cisco switch must manage excess bandwidth to limit the effects of packet flooding types of denial-of-service (DoS) attacks. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000090 - The Cisco switch must have Root Guard enabled on all switch ports connecting to access layer switches. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000100 - The Cisco switch must have BPDU Guard enabled on all user-facing or untrusted access switch ports. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000110 - The Cisco switch must have STP Loop Guard enabled. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000120 - The Cisco switch must have Unknown Unicast Flood Blocking (UUFB) enabled. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000130 - The Cisco switch must have DHCP snooping for all user VLANs to validate DHCP messages from untrusted sources. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000140 - The Cisco switch must have IP Source Guard enabled on all user-facing or untrusted access switch ports. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000150 - The Cisco switch must have Dynamic Address Resolution Protocol (ARP) Inspection (DAI) enabled on all user VLANs. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000160 - The Cisco switch must have Storm Control configured on all host-facing switchports. | CONFIGURATION MANAGEMENT |
| CISC-L2-000170 - The Cisco switch must have IGMP or MLD Snooping configured on all VLANs. | CONFIGURATION MANAGEMENT |
| CISC-L2-000180 - The Cisco switch must implement Rapid STP where VLANs span multiple switches with redundant links. | CONFIGURATION MANAGEMENT |
| CISC-L2-000190 - The Cisco switch must enable Unidirectional Link Detection (UDLD) to protect against one-way connections. | CONFIGURATION MANAGEMENT |
| CISC-L2-000200 - The Cisco switch must have all trunk links enabled statically. | CONFIGURATION MANAGEMENT |
| CISC-L2-000210 - The Cisco switch must have all disabled switch ports assigned to an unused VLAN. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000220 - The Cisco switch must not have the default VLAN assigned to any host-facing switch ports. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000230 - The Cisco switch must have the default VLAN pruned from all trunk ports that do not require it. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000240 - The Cisco switch must not use the default VLAN for management traffic. | CONTINGENCY PLANNING |
| CISC-L2-000250 - The Cisco switch must have all user-facing or untrusted ports configured as access switch ports. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000260 - The Cisco switch must have the native VLAN assigned to an ID other than the default VLAN for all 802.1q trunk links. | SYSTEM AND COMMUNICATIONS PROTECTION |
| CISC-L2-000270 - The Cisco switch must not have any switchports assigned to the native VLAN. | SYSTEM AND COMMUNICATIONS PROTECTION |
