Re: [dhcwg] New Version Notification for draft-wing-dhc-dns-reconfigure-01.txt

[Ted Lemon <[e-mail]>]

(ad hat off)

On Jul 1, 2013, at 9:32 AM, Prashanth Patil (praspati) <[e-mail]> wrote:
> Yes, this was one of the suggestions made earlier. Notification from relay
> then becomes generic and not specific to DNS. The server decides whatever
> actions need to be done, such as reconfiguring DNS server lists.

I'm sorry, but you did not answer my question.   The question was this:

>> Why don't you just configure the DHCP server to return DNS servers in a
>> different order for different links?   Links are identified by relay
>> agent, so this gets you the precise behavior you want, but with a
>> centralized configuration file rather than with per-relay configuration.

That is, I am not suggesting this as an alternative.   I am asking you why you don't consider this to be a better alternative.

The reason I ask is that what you are proposing is extremely harmful.   You are requiring new special protocol extension with new special-case code to be added to the DHCP server to handle this use case, and you are requiring that relay agents throughout the network be individually configured to specify behavior on the DHCP server, which is a maintenance nightmare.

So if you want to do something this harmful, you should have a good explanation for why it's better than the alternative.