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XCCDF
Juniper EX Series Switches Layer 2 Switch Security Technical Implementation Guide
SRG-NET-000362-L2S-000022
The Juniper EX switch must be configured to enable BPDU Protection on all user-facing or untrusted access switch ports.
The Juniper EX switch must be configured to enable BPDU Protection on all user-facing or untrusted access switch ports.
An XCCDF Rule
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The Juniper EX switch must be configured to enable BPDU Protection on all user-facing or untrusted access switch ports.
Medium Severity
<VulnDiscussion>If a rogue switch is introduced into the topology and transmits a Bridge Protocol Data Unit (BPDU) with a lower bridge priority than the existing root bridge, it will become the new root bridge and cause a topology change, rendering the network in a suboptimal state. BPDU Protection allows network designers to enforce the STP domain borders and keep the active topology predictable. The devices behind interfaces that have BPDU Protection enabled are not able to influence the STP topology. At the reception of BPDUs, BPDU Protection disables the port and logs the condition.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>