RFC1101, network info in DNS. Usefull ?

Jim Reid jim at rfc1035.com
Mon Jan 24 18:13:50 UTC 2000


>>>>> "Marc" == Marc Lampo <Marc_Lampo at hotmail.com> writes:

    Marc> Thanks, an interesting example and easy to see the benifit
    Marc> in the output of "netstat -r".  However, you seem to be
    Marc> defining A-records at the subnet-level itself.  Whereas
    Marc> rfc1101 attaches the A-record to the surrounding subnet.

    Marc> Since the .8, .16 and .24 are not further subnetted, they do
    Marc> not require additional A-records (but kind of "inherit" the
    Marc> A-record from the surrounding "class C"
    Marc> (0.242.6.62.in-addr.arpa)

Yeah, but it doesn't seem to hurt to have those extra A records. For
one thing, it always reminds me what netmask is in use on each
subnet. :-) I tried it with these extra A records removed: the
resolver still looks for an A record for 8.242.6.62.in-addr.arpa even
if it's not there. [Not that that should suprise anyone.] So, I figure
that explicitly giving that A record keeps things nice and tidy. I was
also thinking that there could be something like a routing daemon that
might directly try a DNS lookup for the subnet mask of the current
subnet.



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