Re: [DNA] Sending RS probe after link-change in simple DNA

[JinHyeock Choi <jinchoe@gmail.com>]

Suresh

>  >>  > Upon every DNA operation,
>  >>  > a host should re-affirm it's default router address & perform DAD,
>  >>  > even it turns out that the host remains at the same link.
>  >>
>  >>  This is already the case. Only an RA from a known router will confirm
>  >>  the addresses associated with that router as usable. Any other RA (i.e.
>  >>  not from a previously known router) will be processed using 4861/4862 rules.
>  >
>  > Allow me to make more clear expression.
>  >
>  > The above is about
>  > not to verify host's IP address
>  > but to verify default router's address.
>  >
>  > Overall I still have difficulty discerning
>  > how simple DNA verifies IP configuration parameters other than IP address
>  > such as prefix, router address or MTU.
>  > (I'm still waiting for your reply.)
>
>  If the host verifies a router address through an NS/NA pair it assumes
>  all the addresses formed from the prefixes obtained from that router are
>  valid (the prefix and the router address are stored in the SDAT). Right
>  now MTU information is not stored. I am fine with including it in the SDAT.
>
>  > Right now, it's written in 3.5. that
>  >
>  >    On reception of a Router Advertisement which contains prefixes which
>  >    intersect with those previously advertised by a known router, the
>  >    host utilizes the configuration associated with the detected network.
>  >
>  > For example, assume a host has two default routers R1 and R2.
>  > Also assume that, upon DNA initiation,
>  > the host receives an RA with a known prefix from R1.
>  >
>  > At this point, will the host start utilizing R2 as a valid default router
>  > or wait till NS/ NA exchange with R2/ RA from R2?
>  >
>  > The above paragraph gives an impression of the first.
>
>  I meant the second one(wait for NS/NA or RA with R2). But you are right.
>  The sentence is unclear. I think I will rephrase the sentence to
>  clarify. Do you have any suggestions?

ok. now I have an impression that

simple DNA verifies IP configuration parameters
such as IP address, prefix & MTU
by individually confirming the reachability with an associated router.

Do I understand right?

thanks for your kind consideration.

best regards

JinHyeock