The Nokia Provider Edge (PE) router must be configured to implement Internet Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) snooping for each virtual private local area network services (VPLS) bridge domain.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-283882 | NOKI-RT-000650 | SV-283882r1203895_rule | CCI-002385 | low |
| Description | ||||
| 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, 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. | ||||
| STIG | Date | |||
| Nokia Service Router OS 25.x Router Security Technical Implementation Guide | 2026-06-15 | |||
Details
Check Text (C-283882r1203895_chk)
Review the router configuration to verify IGMP or MLD snooping has been configured for IPv4 and IPv6 multicast traffic, respectively, for each VPLS bridge domain.
Verify igmp-snooping and mld-snooping are enabled using the command below:
- show service id 10 igmp-snooping all | match "Admin State"
Admin State : Up
IGMP Snooping Admin State : Up
- show service id 10 mld-snooping all | match "Admin State"
Admin State : Up
MLD Snooping Admin State : Up
If the router is not configured to implement IGMP or MLD snooping for each VPLS bridge domain, this is a finding.
Fix Text (F-88352r1203894_fix)
Configure IGMP or MLD snooping for IPv4 and IPv6 multicast traffic, respectively, for each VPLS bridge domain, as shown in the example below:
- configure service vpls 10 igmp-snooping no shutdown
- configure service vpls 10 mld-snooping no shutdown