802.1aq Shortest Path Bridging.pptVIP

802.1aq Shortest Path Bridging Overview for IETF Don Fedyk dwfedyk@ Editor 802.1aq Shortest Path BridgingProject Authorization Request Scope :VLAN Bridges Shortest Path within a region Interwork with Spanning Tree Protocols, RSTP, MSTP bridges This standard specifies shortest path bridging of unicast and multicast frames, including protocols to calculate multiple active topologies that can share learnt station location information, and support of a VLAN by multiple, per topology, VLAN identifiers (VIDs). Compatibility This amendment will not change the conformance of IEEE Std 802.1Q to Std 802. Overview and Architecture, or its relationship to that specification. 802.1Q Data Planes Applicability SPB SPBB Common IS-IS protocol for shortest path trees Must identify the source of the frame Use a Base VID for the SPT Region Works Ships in the Night with other protocols on other VLANs Supports an Internal Spanning Tree in an SPT Region Faster convergence with Link State SPB SPB (802.1Q compliant) Uses VID for source identification, don’t own the C-MAC Solution Attributes VID Trees, one source per bridge, distributed in IS-IS SVL learning of unicast forwarding supported Solution Requirements Must Interwork at edges with RSTP, MSTP The region may default to a single instance MSTP (associated with the “Base VID”) if the VID allocation fails or detects errors Must support loop prevention, may support ingress check SPB Concepts SPBB SPBB (Shortest Path Backbone Bridging) Solution Attributes Single VID for an SPT Region (may use VID Trees) Does not use learning of B-MACs Provider addresses will all be known allows for more efficient flooding (no B-MAC broadcast storms), Reduction in forwarding space Shared Forwarding, Solution Requirements Must use Multicast loop Prevention, Must use ingress check for unicast SPBB Operation SPBB Shortest Path Tree to/from “A” SPBB Multicast Groups IEEE 802.1aq ProjectWhere are we now? Topology Distribution IS-IS Loop Prevention