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1.51 CISC-RT-000710

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Information

The Cisco PE switch must be configured to implement Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) snooping for each Virtual Private LAN Services (VPLS) bridge domain.

GROUP ID: V-221124
RULE ID: SV-221124r999733

IGMP snooping provides a way to constrain multicast traffic at Layer 2. By monitoring the IGMP membership reports sent by hosts within the bridge domain, the snooping application can set up Layer 2 multicast forwarding tables 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 IGMP snooping operation applies to both access circuits and pseudowires within a VPLS bridge domain.

Solution

Configure IGMP or MLD snooping for IPv4 and IPv6 multicast traffic respectively for each VPLS bridge domain.

SW1(config)# bridge-domain 100
SW1(config-bdomain)# ip igmp snooping
SW1(config-bdomain)# end

See Also

https://workbench.cisecurity.org/benchmarks/22581

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-5, CAT|III, CCI|CCI-002385, CSCv7|13.3, Rule-ID|SV-221124r999733_rule, STIG-ID|CISC-RT-000710, Vuln-ID|V-221124

Plugin: Cisco

Control ID: 80b3aaa056492d939e1860e5bd1edea622799082d8bcfdffc85a838ef72896fc