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By default, syslog and debug messages are stamped by UTC, regardless of the time zone that device configured. You should append localtime key word to " service timestamp {log | debug} datetime msec " global command to change that behavior.

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.

Graphical user interface, chart Description automatically generated

The ―imp-null‖ (implicit null) tag instructs the upstream router to pop the tag entry off the tag stack before forwarding the packet.

Note: pop means ―remove the top MPLS label‖