The Juniper EX switch must be configured to prune the default VLAN from all trunked interfaces that do not require it.
An XCCDF Rule
Description
<VulnDiscussion>All unassigned interfaces are placed into the default VLAN and devices connected to enabled, but unassigned interfaces can communicate within that VLAN. Although the default VLAN is not automatically assigned to any trunked interface, if the default VLAN must be trunked or a misconfigured trunk unintentionally includes the default VLAN, unauthorized devices connected to enabled but unassigned access interfaces could gain network connectivity beyond the local switch.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-253968r843937_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Remove unnecessary VLANs from trunked interfaces.
delete interfaces <trunked interface name> unit 0 family ethernet-switching vlan members <default | other unnecessary VLAN name>