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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-220670r991907_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)#int vlan 22
SW1(config-if)#ip add 10.1.22.3 255.255.255.0
SW1(config-if)#no shut