1. 12/11/200049th IETF - San Diego1 IPSP Configuration Model Framework Feedback Lee Rafalow rafalow@raleigh.ibm.com IPSP WG & Policy WG IPSP Configuration Information Model (ICIM) http://rafalow.home.mindspring.com/dmtf.htm http://www.dmtf.org/spec/cims.html Feedback discussions

2. 12/11/200049th IETF - San Diego2 DMTF Device-Model Overview

3. 12/11/200049th IETF - San Diego3 Derived from Policy Framework

4. 12/11/200049th IETF - San Diego4 Filter-based Conditions

5. 12/11/200049th IETF - San Diego5 Actions, Proposals & Transforms

6. 12/11/200049th IETF - San Diego6 IPSP Configuration Info Model Feedback Discussion Many of the differences in the models can be traced back to: –PCIM is a general framework –QPIM is a domain-level policy model –QDDIM is a device-level model of operational behavior –ICIM is a device-level policy model A few are just different approaches

7. 12/11/200049th IETF - San Diego7 Condition Differences Filters & “Atoms” (QPIM) –IPSP provides for discipline-specific condition evaluation information using associations to a FilterList and CredentialManagementService –QPIM defines subclasses of Condition that provide a general grammar Implicit Condition Semantics –IPsec protocol provides identity information at different times in the protocol sequence –Condition evaluation is predicated on presence of the information, i.e., semantic of identity and credential filter is compound “if present and ” if and may evaluate to TRUE in early stage of Phase 1 and evaluate to FALSE once identity information is available

8. 12/11/200049th IETF - San Diego8 IPsecPolicyGroupInPolicyGroup.GroupPriority (QPIM) –IPSP models GroupPriority in the aggregation –QPIM models gpPriority as a property of gpsPolicyGroup (in the same way as RulePriority) Rules in exactly one group (PCIM) Unique Rule & Group Priority values (PCIM) –Deterministic rule evaluation order Decision Strategy (QPIM) –IPSP decision strategy is Match First, implicit –QPIM has explicit decision strategies defined in qpPolicyDomain.gpPolicyRuleMatchMethod and gpsPolicyGroup.gpNamedPolicyRuleMatchMethod Group-related Differences

9. 12/11/200049th IETF - San Diego9 PolicyGroup, Roles & Interface Bindings (PCIM) –IPsec model defines explicit association between IPsecPolicyGroup and interfaces (IPProtocolEndpoint) to which it applies –PCIM defines PolicyRole on a rule basis, association by named relationship IKERule.IdentityContexts & Roles (PCIM) –IdentityContexts uses roles and role combinations syntax –Provides named relationship between IKERule and appropriate local identity to use, used with other properties IKEAction.UseIkeIdentityType IPProtocolEndpoint Policy Roles

10. 12/11/200049th IETF - San Diego10 Inheritance Discussion Device-level model structures –QDDIM is a model of operational behavior, derives from operational classes –IPSP ICIM is a policy model, derives from Policy classes PolicyActions vs. Settings –Some disagreement about class derivations Multiple inheritance in a single inheritance environment –Bypass and Discard

11. 12/11/200049th IETF - San Diego11 PolicyRule.SequencedActions (PCIM) –“Mandatory” but with a “use first appropriate” semantic, extend enumeration values? PolicyElementInRepository (QPIM) –IPSP defines …InRepository associations for SAProposal & SATransform, weak associations –QPIM defines one general association Other Discussion Topics