[radvd-devel-l] RDNSS Option

Mickaël Guérin kael at withinthebox.net
Thu Mar 9 15:05:13 EST 2006

Pekka Savola a écrit :

> On Thu, 9 Mar 2006, Mickaël Guérin wrote:
>>> However, the lifetime and preference values are the same for all the
>>> DNS server addresses sent using one option, right?
>> No, you can put several dns servers and each server can have a different
>> preference and lifetime (like specified in the ietf draft).
> Correct, but then each DNS server address must be carried in a 
> separate RDNSS option, which causes overhead.  So, you should be able 
> to avoid that in case you don't need separate lifetime/preference 
> values for RDNSS_1, RDNSS_2, and RDNSS_3.
>> I agree, but this (different lifetime & preference) was a need we had 
>> (the work was done at school, so we had to follow the teacher's 
>> instructions -- the teacher was working on working on ad-hoc network 
>> but I've never understood his needs ;) ) I think it's better to 
>> follow the draft, there are maybe cases where it can be usefull.
> OK, if there is a need for specifying different preferences (I can see 
> how that could be useful, maybe it's something that should be changed 
> in the draft as a matter of fact), maybe both approaches should be 
> supported:  multiple RDNSS options and a single RDNSS option with 
> multiple DNS addresses.
> Do you agree that multiple DNS servers in a single RDNSS statement 
> should also be supported?
Yes, I agree, it will be supported in the next release of the patch ;)


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