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By default IPv6 socket with IPV6_ROUTER_ALERT socket option set will receive all IPv6 RA packets from all namespaces. IPV6_ROUTER_ALERT_ISOLATE socket option restricts packets received by the socket to be only from the socket's namespace. Signed-off-by: Maxim Martynov <maxim@arista.com> Signed-off-by: Francesco Ruggeri <fruggeri@arista.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>