diff --git a/doc/ietf67-design-02.odp b/doc/ietf67-design-02.odp new file mode 100644 index 000000000..4be2c7d4e Binary files /dev/null and b/doc/ietf67-design-02.odp differ diff --git a/doc/ietf67-design-02.pdf b/doc/ietf67-design-02.pdf new file mode 100644 index 000000000..1ebdaf92d Binary files /dev/null and b/doc/ietf67-design-02.pdf differ