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Full Discussion: How to DNS Setup ??
Special Forums IP Networking How to DNS Setup ?? Post 302563147 by pludi on Monday 10th of October 2011 07:57:23 AM
Old 10-10-2011
The alternate server is used in case the Preferred (or primary) isn't reachable, or sometimes if it can't serve the domain requested.

Yes, it's possible, but complicated. One option (which I've never even attempted since every description of it has big warnings associated with it) is a split-horizon DNS server setup, where it serves different answers based on the source IP of the request. The other option is to assign multiple IPs to the server, and have multiple DNS instances listening, each with it's own IP and set of configuration files.
 

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Net::DNS::RR::L64(3)					User Contributed Perl Documentation				      Net::DNS::RR::L64(3)

NAME
Net::DNS::RR::L64 - DNS L64 resource record SYNOPSIS
use Net::DNS; $rr = new Net::DNS::RR('name IN L64 preference locator64'); $rr = new Net::DNS::RR( name => 'example.com', type => 'L64', preference => 10, locator64 => '2001:0DB8:1140:1000' ); DESCRIPTION
Class for DNS 64-bit Locator (L64) resource records. The L64 resource record is used to hold 64-bit Locator values for ILNPv6-capable nodes. METHODS
The available methods are those inherited from the base class augmented by the type-specific methods defined in this package. Use of undocumented package features or direct access to internal data structures is discouraged and could result in program termination or other unpredictable behaviour. preference $preference = $rr->preference; A 16 bit unsigned integer in network byte order that indicates the relative preference for this L64 record among other L64 records associated with this owner name. Lower values are preferred over higher values. locator64 $locator64 = $rr->locator64; The Locator64 field is an unsigned 64-bit integer in network byte order that has the same syntax and semantics as a 64-bit IPv6 routing prefix. COPYRIGHT
Copyright (c)2012 Dick Franks. Package template (c)2009,2012 O.M.Kolkman and R.W.Franks. All rights reserved. This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
perl, Net::DNS, Net::DNS::RR, RFC6742 perl v5.18.2 2014-01-16 Net::DNS::RR::L64(3)
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