draft-ietf-dhc-pv4-reconfigure-00.txt   draft-ietf-dhc-pv4-reconfigure-01.txt 
Submitted to DHC Working Group Peter De Schrijver Submitted to DHC Working Group Peter De Schrijver
INTERNET DRAFT Yves T'Joens INTERNET DRAFT Yves T'Joens
<draft-ietf-dhc-pv4-reconfigure-00.txt> Christian Hublet <draft-ietf-dhc-pv4-reconfigure-01.txt> Christian Hublet
Alcatel Alcatel
March 2000 June 2000
Expires September 2000 Expires December 2000
Dynamic host configuration : DHCP reconfigure extension Dynamic host configuration : DHCP reconfigure extension
Status of this memo Status of this memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that other Task Force (IETF), its areas, and its working groups. Note that other
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``working draft'' or ``work in progress.'' ``working draft'' or ``work in progress.''
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
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Distribution of this memo is unlimited. Distribution of this memo is unlimited.
Abstract Abstract
This draft defines extensions to DHCP [DHCP] to allow dynamic This draft defines extensions to DHCP [DHCP] to allow dynamic
reconfiguration of a single host triggered by the DHCP server (eg. a reconfiguration of a single host triggered by the DHCP server (eg. a
new IP address). This is achieved by introducing a unicast DHCP new IP address). This is achieved by introducing a unicast DHCP
FORCERENEW message which forces the client to the RENEW state. FORCERENEW message which forces the client to the RENEW state.
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'yiaddr' 0 'yiaddr' 0
'siaddr' 0 'siaddr' 0
'flags' 0 'flags' 0
'giaddr' 0 'giaddr' 0
'chaddr' client's hardware address 'chaddr' client's hardware address
'sname' 0 'sname' 0
'file' 0 'file' 0
'options' options 'options' options
DHCP option 53 (DHCP message type) is extended with a new value : DHCP option 53 (DHCP message type) is extended with a new value :
DHCPFORCERENEW (TBD)
DHCPFORCERENEW
5. Failover Considerations 5. Failover Considerations
A DHCP server should only send a DHCPFORCERENEW when it's fully aware A DHCP server should only send a DHCPFORCERENEW when it's fully aware
of the current state of the DHCP client. In practice this means it of the current state of the DHCP client. In practice this means it
should only send a DHCPFORCERENEW when in "PARTNER DOWN", should only send a DHCPFORCERENEW when in "PARTNER DOWN",
"COMMUNICATIONS INTERRUPTED" or "NORMAL" state, and only for DHCP "COMMUNICATIONS INTERRUPTED" or "NORMAL" state, and only for DHCP
clients of which the state is synchronised. clients of which the state is synchronised. (see [DHCP-FAILOVER])
6. IANA Considerations 6. IANA Considerations
A new value for DHCP option 53 (DHCP message type) should be added to The new value for DHCP option 53 (DHCP message type) to indicate a
indicate a DHCPFORCERENEW message. DHCPFORCERENEW message is TBD.
7. Security Considerations 7. Security Considerations
Depending on layer 2 characteristics, DHCP force renew can be used to As in some network environments DHCPFORCERENEW can be used to snoop
snoop and spoof traffic. To prevent this, the DHCPFORCERENEW message and spoof traffic, the DHCPFORCERENEW message MUST be authenticated
should be authenticated using a shared secret based mechanism as using a shared secret based mechanism as described in [DHCP-AUTH].
described in [DHCP-AUTH].
8. References 8. References
[DHCP] R.Droms, "Dynamic Host Configuration Protocol", RFC 2131, [DHCP] R.Droms, "Dynamic Host Configuration Protocol", RFC 2131,
March 1997. March 1997.
[DHCP-AUTH] R. Droms, "Authentication for DHCP Messages", draft- [DHCP-AUTH] R. Droms, "Authentication for DHCP Messages", draft-ietf-
ietf-dhc-euthentication-12, October 1999. dhc-authentication-12, October 1999, Work in progress.
[DHCP-FAILOVER] R. Droms, K. Kinnear, M. Stapp, B. Volz, S. Gonczi,
G. Rabil, M. Dooley, A. Kapur, "DHCP Failover Protocol", draft-ietf-
dhc-failover-06.txt, March 2000, Work in progress.
9. Contacts 9. Contacts
Peter De Schrijver Peter De Schrijver
Alcatel Corporate Research Center Alcatel Network Strategy Group
Francis Wellesplein 1, 2018 Antwerp, Belgium Francis Wellesplein 1, 2018 Antwerp, Belgium
Phone : +32 3 240 8569 Phone : +32 3 240 8569
E-mail : peter.de_schrijver@alcatel.be E-mail : peter.de_schrijver@alcatel.be
Yves T'joens Yves T'joens
Alcatel Corporate Research Center Alcatel Network Strategy Group
Francis Wellesplein 1, 2018 Antwerp, Belgium Francis Wellesplein 1, 2018 Antwerp, Belgium
Phone : +32 3 240 7890 Phone : +32 3 240 7890
E-mail : yves.tjoens@alcatel.be E-mail : yves.tjoens@alcatel.be
Christian Hublet Christian Hublet
Alcatel Carrier Internetworking Division Alcatel Carrier Internetworking Division
De Villermontstraat 28, 2550 Kontich, Belgium De Villermontstraat 28, 2550 Kontich, Belgium
Phone : +32 3 450 3322 Phone : +32 3 450 3322
E-mail : Christian.Hublet@alcatel.be E-mail : Christian.Hublet@alcatel.be
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