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Jaharre Shepard Shemeca Bowie November 24, 2015 Jaharre Shepard Shemeca Bowie What is 802.1aq? • Shortest Path Bridging (SPB) – networking technology intended to simplify the creation and configuration of networks – enables multipath routing Adopting 802.1aq 802.1aq today Development Building •March 4, process •2014 Winter Olympics was 2006 •March 2012 the first fabric- IEEE •This day enabled event approved the marked the using SPB IEEE 802.1aq first draft of 802.1aq standard 802.1aq technology Before the Standard • IEEE 802.1d which was Spanning Tree Protocol(STP). • Standardized in 1998, STP purpose was to prevent bridge loops and ensure loop proof topology. Sponsored by Main Competitor • IETF TRILL – Internet Engineering Task Force – Transparent Interconnection of Lots of Links – Combines techniques from bridging and routing TRILL You can join Ethernet potentially long data segments using interruption Bridges no way to load deliberately introduce balance traffic loops for resiliency allowed campus and datacenter networks to scale with resilient links. SPB use all available physical complex because connectivity compatibility with fast restoration of existing technology connectivity after failure is maintained rapid restoration of broadcast and multicast connectivity 10 IEEE Standards Organization aka NesCom IEEE 802 is here: aka RevCom a standards committee formed by the Computer Society May 8, 2012 25 IEEE Societies & Councils Additions to SPB A new control Backward Multiple loop free plane for Q-in-Q compatible to shortest paths and M-in-M 802.1 – 802.1ag, routing Leverage existing Y.1731, Data Tremendous use of inexpensive ASICs Center Bridging mesh connectivity Q-in-Q mode suite – Currently 16, called SPBV path to 1000’s including hashed M-in-M mode per hop. called SPBM Optimum multicast – head end or tandem replication Additions to SPB Shortest- Path SPBV is very flexible and can be Bridging- used in networks implementing VID IEEE 802.1Q VLANs IEEE 802.1ad provider bridges IEEE 802.1ah provider backbone bridges Two modes of operation 14 Topology Layers SPB, MMRP, SRP Station Location source address learning (MAC address topology) real) - SPB, MVRP, SRP VLAN Topology Active Topology (shortest path, spanning tree, TE path) Management controls Physical Network Topology (enable/disable port) SPB, MSTP, RSTP Subset (real or non or (real Subset Summary Shortest Path Bridging (SPB) has 802.1aq allows for the best been standardized by the IEEE as shortest path forwarding in a the next step in the evolution of mesh Ethernet network context the various spanning tree and utilizing multiple equal cost registration protocols. paths. 802.1aq Combined with this is single This permits it to support much point provisioning for logical larger Layer 2 topologies, with connectivity membership, which faster convergence, and vastly includes point-to-point, point-to- improved use of the mesh multipoint, and multipoint-to- topology. multipoint variations.” - Fedyk References •https://www.nanog.org/meetings/nanog50/prese ntations/Sunday/IEEE_8021aqShortest_Path.pdf •https://en.wikipedia.org/wiki/IEEE_802.1aq#Ben efits •https://kirk.rvdp.org/publications/TRILL-SPB.pdf •https://standards.ieee.org/develop/govern.html.
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