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

[Suresh Krishnan <suresh.krishnan@ericsson.com>]

Hi Jin,
   Thanks for the comments. Please see responses inline.

JinHyeock Choi wrote:
> Dear 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?

Thanks
Suresh