1 Policy-Enabled Path Computation Framework ( draft-bryskin-pce-policy-enabled-path-comp-01.txt ) Igor Bryskin (Movaz Networks) : Dimitri Papadimitriou (Alcatel) : Lou Berger (LabN Consulting, LLC) :

2 Changes since IETF64 qTwo PCE policy related drafts were presented at IETF64: draft-berger-pce-policy-architecture-00.txt draft-bryskin-pce-policy-enabled-path-comp-00.txt qLarge piece of the first document was incorporated into draft-ietf-pce-architecture-04.txt qThe remainder is merged with the second document

3 Status of the document qThe merged document contains vBackground: –motivations, representative scenarios, usage cases vRequirements for policy enabled path computation framework vPolicy enabled path computation framework components v Introduction of PCPIM vPolicy application and configuration scenarios vInter-component communications vName change:  Policy-Enabled Path Computation Framework

4 Solution Requirements q(G)MPLS path computation-specific qSupport for various policies and policy configurations  Provision for Monitoring and Accounting Information  Fault tolerance and recovery  Support for policy-ignorant nodes qScalability  Security and denial of service considerations qReuse of existing policy infrastructures (e.g. PCIM) management tools, access and communication protocols

5 Path Computation Core Information Model (PCCIM)  Policy Core Information Model (PCIM) is introduced in RFC 3060 and expanded in RFC 3460 qPresents the object-oriented information model for representing general policy information qDefines two hierarchies of object classes:  structural classes representing policy information and control of policies vassociation classes that indicate how instances of the structural classes are related to each other qClasses could be mapped to various concrete implementations, for example, to a directory that uses LDAPv3 as its access protocol

6 Policy (abstract) PolicySet (abstract) PolicyGroup PolicyCondition (abstract) PolicyAction (abstract) PolicyVariable (abstract) PolicyValue (abstract) PolicyRule PolicyTimePeriodCondition VendorPolicyCondition SimplePolicyCondition CompoundPolicyCondition CompoundFilterCondition VendorPolicyAction SimplePolicyAction CompoundPolicyAction PolicyExplicitVariable PolicyImplicitVariable Sub-tree of more specific classes Sub-tree of more specific classes

7 Policy Enabled Path Computation Framework Components qPC Policy Repository qPCE Policy Decision Point (PCE-PDP)  PCE Policy Enforcement Point (PCE-PEP)  PCC Policy Decision Point (PCC-PDP)  PCC Policy Enforcement Point (PCC-PEP)  Policy Communication Protocol qPCC-PCE Communication Protocol

8 PCC-PCE configuration Single repository PC Policy Management PC Policy Repository PCC-PDPPCE-PDP PCC-PEPPCE-PEP Policy APolicy B e.g. COPS, COPS-PR PCC-PCE communication protocol

9 PCC-PCE configuration Multiple repositories PC Policy Repository 1 PCC-PDPPCE-PDP PCC-PEPPCE-PEP Policy A e.g. COPS, COPS-PR PCC-PCE communication protocol PC Policy Repository 2 Policy B

10 Policy Application (Policy applied only on PCE) PC Policy Management PC Policy Repository PCE-PDP PCCPCE-PEP Policy e.g. COPS, COPS-PR PCC-PCE communication protocol

11 Policy Application (Policy applied only on PCC) PC Policy Management PC Policy Repository PCC-PDP PCC-PEPPCE Policy e.g. COPS, COPS-PR PCC-PCE communication protocol

12 Policy Application (Policy applied on PCC and PCE) PC Policy Management PC Policy Repository PCC-PDPPCE-PDP PCC-PEPPCE-PEP Policy APolicy B e.g. COPS, COPS-PR PCC-PCE communication protocol

13 Next Steps qPath Computation Policy Information Model vPCIM sub-model vExtension of QPIM qDetailed specification of functions performed by each of the framework components qWG document?

14 Thank You