The Juniper EX switch must be configured to enable IGMP or MLD Snooping on all VLANs.
An XCCDF Rule
Description
<VulnDiscussion>IGMP and MLD snooping provides a way to constrain multicast traffic at layer 2. By monitoring the IGMP or MLD membership reports sent by hosts within a VLAN, the snooping application can set up layer 2 multicast forwarding tables to deliver specific multicast traffic only to interfaces connected to hosts interested in receiving the traffic, thereby significantly reducing the volume of multicast traffic that would otherwise flood the VLAN.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-253963r843922_rule
- Severity
- Low
- References
- Updated
Remediation - Manual Procedure
Configure IGMP or MLD snooping for IPv4 and IPv6 multicast traffic respectively for each VLAN.
Global:
set protocols igmp-snooping vlan all immediate-leave
set protocols igmp-snooping vlan all interface <multicast router interface name>.<logical unit> multicast-router-interface
set protocols mld-snooping vlan all immediate-leave