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IEEE 802.1Qca Path Control and Reservation

Joint IEEE-SA and ITU Workshop on Ethernet. IEEE 802.1Qca Path Control and Reservation. János Farkas , Ericsson. Outline. Background Shortest Path Bridging (SPB) [IEEE 802.1aq, IETF RFC 6329] Path Control and Reservation (PCR) P802.1Qca project goals Explicit Path (EP) establishment

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IEEE 802.1Qca Path Control and Reservation

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  1. Joint IEEE-SA and ITU Workshop on Ethernet IEEE 802.1QcaPath Control and Reservation János Farkas, Ericsson

  2. Outline • Background • Shortest Path Bridging (SPB)[IEEE 802.1aq, IETF RFC 6329] • Path Control and Reservation (PCR) • P802.1Qca project goals • Explicit Path (EP) establishment • Support for reservation and redundancy

  3. Background –Shortest Path Forwarding BR A BR C BR E BR A BR A BR E BR E BR C BR C BR D BR B BR D BR D BR B BR B SPBShortest Path Bridging MSTP Multiple SpanningTree Protocol MSTP Multiple SpanningTree Protocol RSTPRapid SpanningTree Protocol RSTPRapid SpanningTree Protocol Shortest Path Bridging (SPB): each bridge has its own Shortest Path Tree (SPT) Frame forwarding is on the shortest path

  4. Background – Shortest Path Bridging • IEEE 802.1aq SPB is an add-on to IS-IS • Single link state control for large networks • Scalability • High degree of automation • Deterministic multi-path routing for unicast and multicast • Fast convergence • All 802.1 standards supported, e.g. CFM • MEF services natively provided • E-LINE, E-TREE, E-LAN

  5. IEEE P802.1QcaPath Control and Reservation (PCR) Extend IS-IS for bridges beyond shortest path capabilities Explicit paths Bandwidth and stream reservation Redundancy for data flows(protection, restoration) Distribution of control parameters for time synchronization and scheduling

  6. Explicit Paths CB 5 EB 2 EB 2 EB 3 EB 1 EB 4 EB 1 EB 3 EB 4 • Single PCE • e.g. data center network;PCE: application on a VM • Multiple PCEs • e.g. time-sensitive network;PCE: application on bridges Ctrl PDUs PCE VM: VirtualMachine PCE PCE IS-IS IS-IS Path 1 Path 1 Server Path 2 Host 2 Host 1 Path 3 Path 2 Host 4 Host 3 • Explicit Paths(EP) are determined by Path Computation Element(s) (PCE) • Point-to-point • Multipoint (point-to-multipoint or multipoint-to-multipoint • IS-IS installs the explicit paths

  7. IS-IS Support forReservation and Redundancy PCE Request Topology etc. Path(s) IS-IS • Reservation • IS-IS support for Stream Reservation Protocol (SRP) • PCE + IS-IS  Explicit Path • SRP  Reservation along EP • Basic reservation by IS-IS (1 PCE) • Redundancy • Maximum disjoint paths for protection • PCE + IS-IS  Explicit Paths • Protection mechanism on top of the EPs • Loop Free Alternates (LFA): reroute in a few ms

  8. Thank You!

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