> | Now I have a question. Should routerA advertise RA messages on
> | segment2?
>Yes, without a doubt, this has always been a part of the IP model.
>Router preferences have been something of an issue over time - the
>difficulty being that it is very hard to assign a linear metric
>set to any more than 2 routers (and even to 2, not always) in general.
from RFC2461 5.1 (conceptual data structures) I feel that the authors
assumed that:
- autoconfigured hosts are at the very edge of the site only
- if we put a host onto a link with more than 2 routers, they will not
automatically be configured, and do something tricky (like running
routing daemon on hosts in receive-only mode).
router
|
==+=======+== <--- no autoconfigured hosts here
| |
router router
| |
==+== ==+==
| |
host host
but anyway, we need to talk about how the non-leaf case should be
handled in terms of host autoconfiguration. even today, we see almost
no use of DHCPv4 static route option (RFC2132 5.8) - we just
autoconfigure default router(s) to DHCPv4 client, that's all.
itojun
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