[e2e] node addresses vs. interface addresses

[Christian Huitema]

> Alas, that's not what most multi-homing users want; they want "site
> multi-homing", where some organization (typically a company) 
> wants robust
> service and so is connected twice to the rest of the Internet 
> fabric; these
> connections are usually widely separated in the topology (typically by
> signing up with two different ISP's).

In fact, if the multi-homed site is small enough, it is possible to
provide each host/interface with as many addresses as the site has
providers, and then use the host multi-homing technology to sort out
which address is used when. This is clearly a trade-off: lower impact on
the global routing fabric versus more complex site management. I would
expect small sites such as home networks to lean towards "host
multihoming", while large sites such as large corporations will simply
pay their way into global routing.

-- Christian Huitema