1. OSPF-TE Extensions for WSON-specific Network Element Constraints draft-peloso-ccamp-wson-ospf-oeo-02 Giovanni Martinelli, Julien Meuric, Pierre Peloso

2. draft-peloso-ccamp-wson-opsf-oeo-02 2 | OSPF-TE extensions for WSON | IETF 79th Rationales for WSON work in ccamp Target: Flooding of information through OSPF-TE to provide a graph to compute both spatial and spectral assignment of a LSP into an all-optical meshed network (WSON). Issues to solve: Not only flooding of wavelength availability inside links, but also:  Switching constraints (spatial and spectral) inside nodes (between links)  Description of O-E-O resources inside nodes (for regeneration or conversion purposes)  Their availability  Their features  Their accessibility

3. draft-peloso-ccamp-wson-opsf-oeo-02 3 | OSPF-TE extensions for WSON | IETF 79th Changes since 01 Demand from the chairs to merge with drafts:  draft-ietf-ccamp-wson-signal-compatibility-ospf  draft-zhang-ccamp-rwa-wson-routing-ospf-03 see draft tree next slide

4. draft-peloso-ccamp-wson-opsf-oeo-02 4 | OSPF-TE extensions for WSON | IETF 79th Documents tree concerning RWA draft-ietf-ccamp-rwa-wson-framework-07 (gone through last-call) draft-ietf-ccamp-rwa-info-09 draft-ietf-ccamp-rwa-wson-encode-06 draft-ietf-ccamp-general-constraint-encode-03 draft-ietf-ccamp-wson-signal- compatibility-ospf-02 draft-zhang-ccamp-general-constraints-ospf-ext-00 draft-peloso-ccamp-wson-ospf-oeo-02 OVERLAPS? Scope: OEO equipments and their usage in RWA Scope: Connectivity constraints in nodes and labels usage in links

5. draft-peloso-ccamp-wson-opsf-oeo-02 5 | OSPF-TE extensions for WSON | IETF 79th Status on works to reach convergence First, acknowledge the policy of separation between generic and WSON-specific extensions Second separate items into two categories:  What was commonly agreed  This stuff ended in draft-zhang-ccamp-general-constraints-ospf-ext-00  Items with some technical divergences  This stuff is kept separated in current draft and the one presented just before Third conform to the framework documents and get aligned with the encoding drafts (while not being bonded by their content)

6. draft-peloso-ccamp-wson-opsf-oeo-02 How about mapping on TOP level TLVs? No Concern about *what* information (well described in general/wson specific encoding) but how we pack them together. 6 | OSPF-TE extensions for WSON | IETF 79th TE-Link TLV rfc3036 TE-Link TLV rfc3036 Node-Address TLV rfc5786 Node-Address TLV rfc5786 Resource Block Attribute TLV Resource Block Attribute TLV Wson Sub-TLV List of New sub-TLVs: (General + WSON specific) Mapping Top Level TLVs new

7. draft-peloso-ccamp-wson-opsf-oeo-02 7 | OSPF-TE extensions for WSON | IETF 79th A B C D Technical description of the OSPF-TE modifications – previous draft-ietf-ccamp- wson-signal-compatibility-ospf Provide an OSPF-TE layout  Have LSA for WDM links with availability of wavelength (dynamic)  Have LSA for switching constraints of nodes and OEO resources (static and dynamic) A B C D

8. draft-peloso-ccamp-wson-opsf-oeo-02 8 | OSPF-TE extensions for WSON | IETF 79th A B C D Technical description of the OSPF-TE modifications – current draft-peloso- ccamp-wson-ospf-oeo Provide an OSPF-TE layout that intrinsically separates some static info from some dynamic ones, exploiting the concept of OEO pools  Have LSA for WDM links with availability of wavelength (dynamic)  Have LSA for switching constraints of nodes (static)  Have LSA for OEO resources (static and dynamic) A B C D OEO pool

9. draft-peloso-ccamp-wson-opsf-oeo-02 9 | OSPF-TE extensions for WSON | IETF 79th Why introducing a new top-level TLV to have OEO specific LSA 1. For the sake of OSPF-TE scalability  Smaller objects – independent – more easy to update 2. To reach a certain degree of consistency in each LSA  One object (with a single stage of depth) describe the node switching constraints and all that is related  Another object (with a single stage of depth) describe the OEO pools features 3. To re-use some TLVs of link LSA that make sense concerning OEO pools  SRLGs  TE-metric  Administrative group 4. To keep the specific status of Node LSA (top-level TLV 5) which holds a specifically static content only – i.e. reference IP address.

10. draft-peloso-ccamp-wson-opsf-oeo-02 10 | OSPF-TE extensions for WSON | IETF 79th Questions and discussion?