On Mon, 19 Mar 2012, hugo hugoo <hugo...@hotmail.com> wrote:
Jay,
- Can you give me an example of such configuration?
Sure.
Say I use a DHCP pool of </64_prefix>:a123:b456::/96 within each /64 subnet.
For example:
subnet DHCP pool
_________________ ___________________________
2001:db8:0:a::/64 2001:db8:0:a:a123:b456::/96
2001:db8:0:b::/64 2001:db8:0:b:a123:b456::/96
2001:db8:0:c::/64 2001:db8:0:c:a123:b456::/96
Then you put this in every /64 subnet zone:
;____________________________________________________________
*.6.5.4.b.3.2.1.a IN PTR dhcpv6.whatever.edu.
;____________________________________________________________
so that PTR queries for addresses like:
2001:db8:0:a:a123:b456::4
2001:db8:0:b:a123:b456:1:2
2001:db8:0:c:a123:b456:abc:def
all return "dhcpv6.whatever.edu".
To make that less tedious, I create a file called "dhcpv6.ptr.inc" like this:
;____________________________________________________________
; dhcpv6.ptr.inc
; include file defining wildcard PTR record for DHCPv6 pools
$TTL 86400
@ IN PTR dhcpv6.whatever.edu.
;____________________________________________________________
Each subnet zone file (e.g., zone a.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa
for subnet 2001:db8:0:a::/64) pulls in that file via:
;____________________________________________________________
$INCLUDE dhcpv6.ptr.inc *.6.5.4.b.3.2.1.a
;____________________________________________________________
That way if I want to change the name in the PTR record I edit 1 file instead
of every zone file.
________________________________________________________________________
Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: jay-f...@uiowa.edu, phone: 319-335-5555, fax: 319-335-2951
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