Performance Issues - PTR Records
nanog at namor.ca
Wed Nov 2 19:58:59 CDT 2011
> 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?
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