The Dell OS10 Switch must have IGMP or MLD Snooping configured on all VLANs

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
low	V-269963	SRG-NET-000512-L2S-000002	OS10-L2S-000170	SV-269963r1052275_rule	2024-12-11	1

Description
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.

Description

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.

ℹ️ Check
Review the Dell OS10 Switch configuration to verify that IGMP or MLD snooping has been configured for IPv4 and IPv6 multicast traffic, respectively. Verify that IGMP and MLD snooping have not been disabled globally by checking that the following have not been configured: no ip igmp snooping enable no ipv6 mld snooping enable Verify that IGMP or MLD snooping have not been disabled on any of the individual VLANs: Interface vlan 100 no ip igmp snooping no ipv6 mld snooping If the switch is not configured to implement IGMP or MLD snooping for each VLAN, this is a finding.

ℹ️ Check

Review the Dell OS10 Switch configuration to verify that IGMP or MLD snooping has been configured for IPv4 and IPv6 multicast traffic, respectively. Verify that IGMP and MLD snooping have not been disabled globally by checking that the following have not been configured: no ip igmp snooping enable no ipv6 mld snooping enable Verify that IGMP or MLD snooping have not been disabled on any of the individual VLANs: Interface vlan 100 no ip igmp snooping no ipv6 mld snooping If the switch is not configured to implement IGMP or MLD snooping for each VLAN, this is a finding.

✔️ Fix
Configure IGMP or MLD snooping for IPv4 and IPv6 multicast traffic respectively for each VLAN. Enable IGMP or MLD snooping globally: OS10(config)# ip igmp snooping enable OS10(config)# ipv6 mld snooping enable Enable IGMP or MLD snooping on each VLAN: OS10(config)# interface vlan 100 OS10(conf-if-vl-100)# ip igmp snooping OS10(conf-if-vl-100)# ipv6 mld snooping