Subject: Re: [nemo] [nemo]a question about "Multihomed Mobile Network"

From: Thierry Ernst <[email-masked]>
Date: Tue, 04 Mar 2003 14:59:27 +0900 (JST)

>   In the section 3.4(multihoming) of draft 
>    "draft-ernst-nemo-terminology-01.txt",
> illustrated through the figure 8, the draft said the mobile_network_1 is
>  single-homed to the Internet through MR1. 
> 
> I am confused here,because I don't know where  AR1 attaches to .
> if it attaches to the Internet ,then the mobile_network_1 is multihomed 
> bacause MR1 has two egress interfaces on distinct link,if not ,why it be a AR?

AR1 is a fixed node (LFN) in mobile_network_1. AR1 is attached to
mobile_network_1. It provides access to visiting mobile nodes, not to MR1. 

If a visiting MRi attaches below AR1, mobille_network_1 does not
become multihomed (it is the root-NEMO).

Does it answer the question ?
Thierry

>                 _____________________________
>                |                             |
>                |                             |
>                |        Internet             |
>                |                             |
>                |_____________________________|
>                 __|__         __|__     __|__
>                |     |       |     |   |     |
>                | ARx |       | ARy |   | ARz |
>                |_____|       |_____|   |_____|
>             ______|__       ____|___   ___|____
>              __|__          __|___       ___|__
>             |     |        |      |     |      |
>             | MR1 |        | MR2a |     | MR2b |
>             |_____|        |______|     |______|
>           _____|____        ___|__________|___
>            __|__                  __|__
>           |     |                |     |
>           | AR1 |                | AR2 |
>           |_____|                |_____|
> 
>           Fig.8: Multihomed Nested Mobile Network
>