What is a limitation of IPv6 RA Guard?

Restrictions for IPv6 RA Guard

The IPv6 RA Guard feature does not offer protection in environments where IPv6 traffic is tunneled.

This feature is supported only in hardware when the ternary content addressable memory (TCAM) is programmed.

This feature can be configured on a switch port interface in the ingress direction.

This feature supports host mode and router mode.

This feature is supported only in the ingress direction; it is not supported in the egress direction.

This feature is not supported on EtherChannel and EtherChannel port members.

This feature is not supported on trunk ports with merge mode.

This feature is supported on auxiliary VLANs and private VLANs (PVLANs). In the case of PVLANs, primary VLAN features are inherited and merged with port features.

Packets dropped by the IPv6 RA Guard feature can be spanned.