Re: [shara] First draft of the shara use cases for review

[<[e-mail]>]

Dear Marcelo, all

Thank you for these slides. Please find below some comments:

- Slide 4: 
1/ To avoid confusion with overlapped port ranges, I suggest to have something like (IP1, PR1), (IP1, PR2) etc, assigned to port restricted devices instead of P1...P2, P2...P2 notation. 
2/ Port Range Router is not **necessarily** connected to what you call "rest of Internet IPv4".
3/ What is the role of the two represented PRRs? 

- Slide 5: Idem as slide 4

- Slide 7: 
1/ Why you need a tunnel between represented two routers? 


FYI, additional IPv6-related use cases are defined in draft-boucadair-behave-ipv6-portrange-01. Two modes are defined: encapsulation and translation mode:
The encapsulation mode uses a stateless function called SMAP (Stateless A+P Mapping). A SMAP function may be embedded in a PRR or a port restricted device. A port restricted device may be a CPE, PDA, terminal, etc. I reproduce hereafter these use cases:

- Use IPv6 for incoming traffic destined to a shared IP address. No alteration is required for outgoing traffic.

                  +----------+
         --IPv4---|----------|------------IPv4--------------------\
         ---------|----------|------------------------------------/
                  |          |
                  | +------+ |               +------+
                  | |      | | /----IPv6-----|      |
         /--IPv4--| | SMAP | |//---IPv4----  | SMAP |/---IPv4----
         \--------| |      | |\\-----------  |      |\-----------
                  | |      | | \-------------|      |
                  | +------+ |               +------+
                  |          |
                  +----------+
                     node A                    node B

- IPv6 is used in both directions

                       +------+             +------+
                       |      |----IPv6---\ |      |
           ----IPv4---\|      |----IPv4---\\|      |----IPv4---\
           -----------/|      |-----------//|      |-----------/
                       |      |-----------/ |      |
                       | SMAP |             | SMAP |
                       |      | /----IPv6---|      |
           /---IPv4----|      |//---IPv4----|      |/---IPv4----
           \-----------|      |\\-----------|      |\-----------
                       |      | \-----------|      |
                       +------+             +------+
                        node A               node B

Two interconnection scenarios may be envisaged as listed below:

- Interconnection scenario 1:

+------+           +------+   +--------+   +------+           +------+
|      |--IPv6---\ |      |   |        |   |      |---IPv6--\ |      |
|      |--IPv4---\\|      |---|-IPv4---|--\|      |---IPv4--\\|      |
|      |---------//|      |---|--------|--/|      |---------//|      |
|      |---------/ |      |   |Internet|   |      |---------/ |      |
| SMAP |           | SMAP |   |  IPv4  |   | SMAP |           | SMAP |
|      | /---IPv6--|      |   |        |   |      | /---IPv6--|      |
|      |//---IPv4--|      |/--|-IPv4---|---|      |//--IPv4---|      |
|      |\\---------|      |\--|--------|---|      |\\---------|      |
|      | \---------|      |   |        |   |      | \---------|      |
+------+           +------+   +--------+   +------+           +------+
  Source            node A                  node B           Destination


- Interconnection scenario 2:

   +------+             +------------+              +------+
   |      |             |            |              |      |
   |      |----IPv6-----|----IPv6----|----IPv6----\ |      |
   |      |----IPv4-----|------------|----IPv4----\\|      |
   |      |-------------|------------|------------//|      |
   |      |-------------|------------|------------/ |      |
   | SMAP |             | Internet v6|              | SMAP |
   |      | /-----IPv6--|------------|-----IPv6-----|      |
   |      |//---IPv4----|------------|-------IPv4---|      |
   |      |\\-----------|------------|--------------|      |
   |      | \-----------|------------|--------------|      |
   |      |             |            |              |      |
   +------+             +------------+              +------+
    Source                                            Destination

Cheers
Med
 

-----Message d'origine-----
De : [e-mail] [mailto:[e-mail]] De la part de marcelo bagnulo braun
Envoyé : lundi 16 mars 2009 21:05
À : [e-mail]
Objet : [shara] First draft of the shara use cases for review

Hi,

I have done a first version of the slides describing the SHARA use cases Find them at:
http://www.ietf.org/proceedings/09mar/slides/shara-0.pdf

Comments are welcome.
The suppose to reflect the recent disucssion on scenarios on the ml

Regards, marcelo

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