Minutes from the DHC (Dynamic Host Configuration) working group meetings in Washington, DC. Reported by Ralph Droms with assistance from notes taken by Barr Hibbs, Kim Kinnear and Ann Demirtjis. Tuesday, Nov 9 at 0900-1130 (DHCPv4) Dynamic host configuration : DHCP reconfigure extension Yves T'Joens (Alcatel) draft-schrijvp-dhcpv4-reconfigure-00.txt The author described a proposed option for a unicast message to trigger DHCP client reconfiguration. The WG provided feedback (add authentication, make draft more precise) and agreed to consider the option after a new draft is submitted. The Name Service Search Option for DHCP Carl Smith (Sun) draft-ietf-dhc-nsso-01.txt The WG suggested using a 16-bit value for the service numbers, and to define 0 as a reserved value to configure the client to look in local configuration table. The draft will be ready for WG last call after a final small revision. DHCP Failover Protocol Kim Kinnear (Cisco) draft-ietf-dhc-failover-05.txt Kim reported on phone conferences held since last WG meeting. He will schedule one or two additional phone conferences and submit a new draft for (well before?) the next IETF. The User Class Option for DHCP Jerome Privat (BT) draft-ietf-dhc-userclass-04.txt The WG provided feedback on the most recent draft: simplify the draft, reduce "MUST" policy directives. The author will revise draft according to WG feedback. Double Phase DHCP Configuration Jerome Privat (BT) draft-privat-dhc-doublephase-01.txt WG suggested splitting this document into two drafts: an informational draft for the proxy mechanism and a standards track draft for redirect option. WG will continue to review this option after new drafts are published. Dynamic Registration and Configuration Protocol (DRCP) Anthony McAuley (Telcordia) draft-itsumo-drcp-00.txt Protocol related to DHCP that reduces DHCP client-server communication latency through distributed DHCP servers (or proxies). The WG expressed the opinion that this may be a new protocol, not DHCP. The WG agreed to look at the next draft and decide whether or not to review the protocol. Authentication for DHCP Messages Bill Arbaugh (Penn) draft-ietf-dhc-authentication-12.txt Bill reported on suggestions from Volz. Ran Atkinson suggested splitting into two drafts; WG chose to leave "as is". Draft will go to WG last call after next revision. DHCP Authentication Via Kerberos V Bernard Aboba (Microsoft) draft-hornstein-dhc-kerbauth-01.txt Bernard presented an extension to DHCP to provide Kerberos V authentication between clients and servers and to provide interdomain authentication. The basic mechanism is to transport Kerberos authentication data in DHCP messages (with, potentially, other communication between Kerberos participants). The WG suggested external, authoritative review of the application of Kerberos technology and took no specific action. DHC load balancing algorithm Bernie Volz (Process Software) draft-ietf-dhc-loadb-00.txt This draft results from load balancing technology developed with failover protocol, which seemed to have wider application to DHCP server configuration. Mike Patrick expressed concern about the necessity of configuring relay agents to match servers (if not, some requests may get dropped). Bernie will revise draft according to feedback from WG, and WG will continue to review the document. The Server Selection Option for DHCP Bill Sommerfield (Epilogue) draft-ietf-dhc-sso-03.txt Rob Stevens suggested this option overlaps with load balancing; WG consensus was that overlap was small enough to warrant continued consideration of the server selection option. The WG suggested simplifying the draft (e.g., the descriptions of profiles), changing several "MUST"s to "SHOULD"s, and to allow lease time as tie breaker. Bill will revise and the WG will review the next draft. Dynamic Host Configuration Protocol (DHCP) Server MIB Barr Hibbs (Pacbell) draft-ietf-dhc-server-mib-04.txt Barr will post specific questions to the WG mailing list and revise MIB according to feedback. Next revision should be ready for WG last call. Interpreting Client Options for DHCP Barr Hibbs (Pacbell) draft-ietf-dhc-client-options-00.txt Barr will withdraw this draft or let it expire. Ted Lemon volunteered to begin work on a revision of RFC 2131/2132 that will be submitted for full Standard status. This revision will include clarifications and revised text based on Barr's draft as well as other experience with DHCP. Option for NAT/IPSec interaction Jose Brustoloni (Bell Labs) (no draft available) This option addresses interoperation problems between NAT and IPSec. WG provided feedback and will review a revised draft. Subnet selection option Ted Lemon (for Glenn Waters) draft-ietf-dhc-subnet-option-03.txt Draft is ready for WG last call. Static routes with subnet masks option Ted Lemon (no draft available) Ted will write up draft for an option to pass a list of static routes with subnet masks. Domain name search list option Ted Lemon draft-ietf-dhc-domsrch-02.txt Ted will track down previous draft and move it forward. Tuesday, Nov 9 at 1300-1400 (DHCPv4) DHCP Relay Agent Information Option Mike Patrick (Motorola) draft-ietf-dhc-agent-options-07.txt Mike described Motorola IPR statement. A few new issues were raised: subnet sub-option (WG consensus was to keep it); interaction between relay agent option and IPSec (relay agent should not add option); server should not assume relay agent is present and may choose to add a relay agent information option. The WG agreed to hold a last call on a revised document that addresses these points. DHCP Schema for LDAP Bernie Volz (Process Software) draft-ietf-dhc-schema-01.txt Changes since last revision: New class, containment and inheritance hierarchy Uses common name attribute Added dhcpPolicy object class and text on mapping dhcpPolicy object to Policy WG schema Removed use of auxiliary classes WG agreed to move forward as Proposed Standard document with (potentially?) last call after next revision. Interaction between DHCP and DNS Mark Stapp (Cisco) draft-ietf-dhc-dhcp-dns-11.txt A new RR for use with DHCP has been proposed. DHCP will use this instead of the previously proposed use of the KEY RR. Also, the security section must be updated to reflect TSIG. Mark will revise and resubmit the draft to reflect these changes. A DNS RR for DHCP information Andreas Gustafsson (Internet Engines) draft-ietf-dnsind-dhcp-rr-00.txt The DHCP RR (name will likely change) is an opaque data item stored by a DNS server and holds a DHCP client identifier to indicate the client currently associated with a DNS entry. The new RR holds only a client identifier and no other information (e.g., lease). The WG consensus was that the DHCP RR will meet the requirements for DHCP-DNS interaction and should be moved forward. New Option Review Guidelines and Mike Carney (Sun) Additional Option Namespace draft-ietf-dhc-option-review-and-namespace-01.txt Mike solicited comments from the WG on section 5 (open issues) and would like to go to last call after minor revisions addressing those issues. Tuesday, Nov 9 at 1415-1515 (DHCPv6) Dynamic Host Configuration Protocol for IPv6 (DHCPv6) Mike Carney (Sun) draft-ietf-dhc-dhcpv6-14.txt - Jim Bound (Compaq) Extensions for the DHCP for IPv6 - Charlie Perkins (Nokia) draft-ietf-dhc-v6exts-11.txt WG discussed several open issues: Releasable resources: IPv6 addresses are one example; are there others (none suggested). When and how should these resources be managed (what is leasing strategy) and released (to original server or any server)? Stateful autoconfiguration and multiple IP addresses: discussion centered on tradeoff between complexity and utility - client might make multiple requests for addresses in IPv4-IPv6 transition. Discussion will continue on DHCPv6 mailing list. Stateful autoconfiguration and use of multiple servers (e.g., failover): any useful input from experience with DHCPv4? Document organization: authors prefer to leave as two documents. Authors will pose questions separately to DHCPv6 mailing list for WG discussion and publish revised draft by end of calendar year.