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V-273685

CAT III (Low)

The RUCKUS ICX switch must have IGMP or MLD Snooping configured on all VLANs.

Rule ID

SV-273685r1110988_rule

STIG

RUCKUS ICX Layer 2 Switch Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

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.

Check Content

Review the switch configuration for IGMP and MLD snooping.  

!
ip multicast
ipv6 multicast
!

If IGMP or MLD snooping are not configured for all VLANs, this is a finding.

Fix Text

Configure IGMP or MLD snooping for IPv4 and IPv6 multicast traffic respectively for each VLAN.

Enable IGMP Globally:
ICX# configure terminal
ICX(config)# ip multicast active
Note: If the active keyword is not specified, the default mode is passive.
Optional: IGMP Version
ICX(config)# ip multicast version 3

Other options:

Configure by vlan:
ICX(config)# vlan 20
ICX(config-vlan-20)# multicast active
ICX(config-vlan-20)# multicast version 3
ICX(config-vlan-20)# multicast port-version 3 ethernet 1/2/4 to 1/2/6

Static group assignment:
ICX(config-vlan-20)# multicast static-group 224.1.1.1 count 2 ethernet 1/1/3 ethernet 1/1/5 to 1/1/7