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Performance Issues - PTR Records
- Subject: Performance Issues - PTR Records
- From: nanog at namor.ca (J)
- Date: Wed, 02 Nov 2011 19:58:59 -0500
- In-reply-to: <CAJAdsDkGc2CYfa=CDuCDSoFw1xVQ0TKz4B_MAPqBbFgFsyPnRQ@mail.gmail.com>
- References: <CAKP=495duD9tyeiTwDh0XHEmAeUSgtheGF3CMhyOK7xvfD6UZA@mail.gmail.com> <[email protected]> <CAJAdsDkGc2CYfa=CDuCDSoFw1xVQ0TKz4B_MAPqBbFgFsyPnRQ@mail.gmail.com>
PC wrote:
> What happens if the ISP never defines a name server with their RIR for
> their provider-independent address space? Does ARIN point to somewhere
> which supplies NXDOMAIN? Just a thought -- I don't have a clue.
>
> It is entirely possible they have it pointed to their non-existent or
> broken DNS. Given current best practices, I see no reason not to assign a
> generic x.x.x.x-dynamic.customer.isp.com DNS across their netblock.
I think that returns SERVFAIL somewhere down the line?
Does it make sense to reinforce the behaviour (good and bad terms left for
another time), while looking forward to v6?