The Cisco switch must not use the default VLAN for management traffic.
An XCCDF Rule
Description
Switches use the default VLAN (i.e., VLAN 1) for in-band management and to communicate with directly connected switches using Spanning-Tree Protocol (STP), Dynamic Trunking Protocol (DTP), VLAN Trunking Protocol (VTP), and Port Aggregation Protocol (PAgP)—all untagged traffic. As a consequence, the default VLAN may unwisely span the entire network if not appropriately pruned. If its scope is large enough, the risk of compromise can increase significantly.
- ID
- SV-220693r991949_rule
- Version
- CISC-L2-000240
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Configure the switch for management access to use a VLAN other than the default VLAN.
SW1(config)# interface vlan 44
SW1(config-if)# ip add 10.1.12.1/24
SW1(config-if)# end