I-D ACTION:draft-ietf-dhc-fqdn-opt-00.txt

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Working Group of the IETF.                                                 

       Title     : FQDN DHCP Option                                        
       Author(s) : R. Droms, Y. Rekhter
       Filename  : draft-ietf-dhc-fqdn-opt-00.txt
       Pages     : 4
       Date      : 02/13/1996

DHCP [DHCP] can be used to automate the process of configuring TCP/IP host 
computers.  However, some of the DHCP options carry IP addresses rather 
than Fully Qualified Domain Names (FQDN). Use of IP addresses constrains 
the DHCP client to use the addresses that were in use at the time the 
client received its configuration information; these addresses may change 
over time, (e.g., a server may be assigned a new IP address), so that the 
IP addresses used by the client may become invalid.  
                      
An alternative to passing IP addresses is to pass FQDNs instead of 
(numeric) IP addresses.  Doing this allows to defer binding between a 
particular network entity (e.g., a server) and its IP address until run 
time.  As stated in [Carpenter:95], "Deferring the binding avoids the risk 
of changed mapping between IP addresses and specific network entities (due 
to changing addressing information).  Moreover, reliance on FQDNs (rather 
than IP addresses) also localizes to the DNS the changes needed to deal 
with changing addressing information due to renumbering."  
                
This document defines a new DHCP option that allows the use of FQDNs 
instead of IP addresses in DHCP options.                                   

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