The Juniper PE router must be configured to implement Protocol Independent Multicast (PIM) snooping for each Virtual Private LAN Services (VPLS) bridge domain.
An XCCDF Rule
Description
<VulnDiscussion>PIM snooping provides a way to constrain multicast traffic at Layer 2. By monitoring PIM join and prune packets on each interface, the PE router is able to determine interested multicast receivers and hence will populate the layer 2 multicast-forwarding table. This enables the PE router to deliver traffic only to ports with at least one interested member within the VPLS bridge, thereby significantly reducing the volume of multicast traffic that would otherwise flood an entire VPLS bridge domain. The PIM snooping operation applies to both access circuits and pseudowires within a VPLS bridge domain.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-217074r855903_rule
- Severity
- Low
- References
- Updated
Remediation - Manual Procedure
Configure PIM snooping for each VPLS bridge domain as shown in the example below.
[edit routing-instances VPLS_CUST2]
set routing-instances VPLS_CUST2 protocols pim-snooping