Highly Scalable Ethernets

Transcription

1 Internatinal Telecmmunicatin Unin Highly Scalable Ethernets Paul Bttrff, Chief Architect, Carrier Ethernet, Nrtel MEF VP, Secretary, and Bard Member IEEE P802.1ah Editr April 20, 2006 Wrkshp NGN and its Transprt Netwrks Kbe, April 2006

2 Agenda Intrductin t Metr Ethernet service netwrk Tward an IEEE Ethernet Metr Cnclusins Wrkshp NGN and its Transprt Netwrks Kbe, April

3 IP and Carrier Ethernet are different things? Ethernet is L2 and IP is L3, but: Bth d packet switching Bth can scale glbally Bth use dynamic tplgy prtcls Bth can prvide prtectin, QS, and traffic engineering The fundamental difference is cnnectivity IP can prvide glbal any-t-any cnnectivity Carrier Ethernet can prvide glbal cnnectivity between prvisined sets f netwrk interfaces Carrier Ethernet is a glbal Virtual Private Ethernet multiplexing technlgy IP is a glbal netwrk technlgy In the Enterprise and hme IP runs ver Ethernet netwrks In the Metr IP will run ver Carrier Ethernet Virtual Private Netwrks Wrkshp NGN and its Transprt Netwrks Kbe, April

4 Carrier Ethernet Is a Netwrk Prviding Many Virtual Private Ethernets Each Virtual Private Ethernet is prvisined by the carrier Traffic des nt mix frm ne Virtual Private Ethernet t anther Each Virtual Private Ethernet is a carrier service instance Metr Ethernet Frum is mdeling Ethernet service instances als called Ethernet Virtual Circuits (EVCs) Carrier Ethernet Netwrk (r MEF MEN) Wrkshp NGN and its Transprt Netwrks Kbe, April

5 Basic Ethernet Service Types MEF Ethernet Virtual Cnnectins (EVCs) E-LINE Ruter Mesh MEF 10, 5 Pt-Pt, Like Duplex Ethernet Any-t-any E-LAN Multi-Site MEF 10, 5 MPt, Like VLAN, Any-t-any E-TREE Hub & Spke MEF Phase 2 Wrk in prgress Pt-MPt, Like EPON Ethernet, Rt-t-Leaf and Leaf-t-Rt Wrkshp NGN and its Transprt Netwrks Kbe, April

6 MEF Reference Mdel Applicatin Services Layer (e.g., IP, MPLS, PDH, etc.) Ethernet Services Layer (Ethernet Service PDU) Data Plane Cntrl Plane Management Plane Management Management Plane Plane is is deemed deemed t t be be quite quite imprtant imprtant fr fr carrier carrier class class Ethernet Ethernet Service Service ffering ffering acrss acrss Metr Metr Ethernet Ethernet Netwrks Netwrks (MEN) (MEN) Current Current fcus fcus is is n n bth bth E<->W E<->W and and N<->S N<->S OAM OAM Type Type 2 2 wrk wrk is is fcusing fcusing n n Management Management acrss acrss the the EMS-NMS EMS-NMS (MEF (MEF 7) 7) have have fcused fcused n n N<->S N<->S OAM OAM and and have have wrked wrked with with TMF TMF OAM OAM Prtcl, Prtcl, OAM OAM Requirements Requirements and and Framewrk Framewrk have have fcused fcused n n E<->W E<->W OAM, OAM, and and currently currently wrking wrking with with IEEE IEEE and and Q5/13 Q5/13 Prvisin Prvisin fr fr Type Type 3 3 which which is is expected expected t t fcus fcus n n cntrl cntrl aspects aspects acrss acrss the the service service interface interface i.e. i.e. Transprt Services Layer (e.g., IEEE 802.1, SONET/SDH, MPLS) Specific Specific Data Data Plane Plane activities activities relate relate t t Ethernet Ethernet Service Service Definitins, Definitins, where where Services Services are are defined defined frm frm a a subscriber s subscriber s pint pint f f view. view. MEF MEF 10, 10, MEF MEF 6, 6, MEF MEF 3 3 are are related related t t data data plane plane attributes. attributes. Current Current wrk wrk fcused fcused n n phase phase II II services services Type Type 1 1 IA IA is is fcusing fcusing n n data data plane plane interperability interperability acrss acrss the the Wrkshp NGN and its Transprt Netwrks Kbe, April

7 MEF Services May be Realized by IEEE Prvider Bridge Netwrks, MPLS Netwrks, r SONET All MEF services can be delivered by an IEEE Prvider Bridge Netwrk. PDH, ATM, FR services are carried as a applicatin ver the EVC E-TREE service type is part f nging MEF Phase 2 service wrk Out f rder/ large MTU service ptins IPLS MEF Ethernet Virtual Circuit E-LAN VPLS E-LINE VPWS PDH, ATM, FR, services ptins E-TREE MEF Applicatin Services Wrkshp NGN and its Transprt Netwrks Kbe, April

8 Agenda Intrductin t Metr Ethernet service netwrk Tward an IEEE Ethernet Metr Cnclusins Wrkshp NGN and its Transprt Netwrks Kbe, April

9 IEEE Prvider Backbne Bridge Netwrk (802.1ah) 802.1ad Interfaces Prvider Bridge Netwrk (802.1ad) Prvider Backbne Bridge Netwrk (802.1ah) Prvider Bridge Netwrk (802.1ad) Prvider Bridge Netwrk (802.1ad) 802.1aj CFM(802.1ag) Runs End-t-end MRP(802.1ak) Runs in 802.1ad & 802.1ah Wrkshp NGN and its Transprt Netwrks Kbe, April

10 Eight Ethernet Innvatins Duplex Ethernet Ethernet VLANs Ethernet QS Multi-level Administrative Dmains Hierarchical Addressing Ethernet VLAN Identifier Switching Prtectin Switching Pint t pint Ethernet Transprt Wrkshp NGN and its Transprt Netwrks Kbe, April

11 Lk Bb n CSMA/CD! Duplex and switched Ethernet have remved transmissin distance limits inherit in the riginal CSMA/CD Ethernet IEEE bridging is cmmnly thught f as part f Ethernet, hwever is a different standard s half-duplex Cable-Tree using CSMA/CD Half-Duplex Early 90s mve t duplex (pint t pint) n CSMA-CD Duplex Ethernet Switched Duplex Ethernet Alng with duplex Ethernet bridging became an integral part f Ethernet technlgy Wrkshp NGN and its Transprt Netwrks Kbe, April

12 Separate Finance and Engineering New standards IEEE P802.1ad and P802.1ah are defining Service VLAN (S-VLANs), extending tagging fr S-VLANs (I-TAGs), and backbne tunnel VLANs (B-VLANs) In the Mid 1980 multiple Ethernets were run t islate parts f the business Engineering Finance In the 1990s alng with duplex and switched Ethernet Virtual Bridged Ethernet(VLANs) was invented Tday virtual Bridged Ethernet is being expanded fr Prvider and Prvider Backbne Bridging t allw nesting VLANs Wrkshp NGN and its Transprt Netwrks Kbe, April

13 Class based QS fr Ethernet Ethernet f the 1980s was a best effrt delivery netwrk Hwever it became clear that nt all infrmatin has the same pririty. Ethernet therefre began mving t prvide ways t manage infrmatin differently fr different user classes. This stated in the early 802.1p wrk, hwever is nw cntinuing n many frnts. The MEF 10 Phase 1 service specificatin has specified bth traffic meters and perfrmance metrics fr Ethernet The IEEE P802.1ad prject is wrking n extensins t the riginal 802.1p cde pints t allw drp eligibility MEF services phase 2 prvides QS mdels fr multipint as well as definitins fr availability. Standards wrk n bandwidth allcatin is lagging Wrkshp NGN and its Transprt Netwrks Kbe, April

14 Multiple Dmain Management Onging wrk at IEEE (P802.1ag), MEF, and ITU SG13 (Y.1731) IEEE P802.1ag Service OAM flws at multiple levels. Ethernet Service OAM allws multiple autnmus netwrks. Custmer Service Prvider Custmer Eth Access Cre Eth Access Custmer Dmain Prvider Dmain Operatr Dmain Operatr Dmain Operatr Dmain Wrkshp NGN and its Transprt Netwrks Kbe, April

15 What the Ethernet wrld is nt flat? Each IEEE 802.1ah level encapsulates frames with a new MAC addresses and with a new service tag. Each IEEE 802.1ah nesting level summarizes the MAC addresses f the lwer level with a Backbne MAC address The higher level 802.1ah bridges frward n summarized addresses allwing indefinite scaling withut MAC lkup table explsin. IEEE P802.1ah Level 3 Level 2 Level 1 B-DA B-SA B-TAG I-TAG Client Data FCS B-DA B-SA B-TAG I-TAG Client Data FCS C-DA C-SA S-TAG Client Data FCS Wrkshp NGN and its Transprt Netwrks Kbe, April

16 VLAN ID Switching Pwerful but Dangerus IEEE 802.1ad allws fr VLAN ID switching By switching the 802.1ad VLAN IDs and the 802.1ah Service IDs it is pssible t have limitless VLAN scaling ver a glbal Ethernet Use f this technique cmplicates cntrl since frames within the netwrk must retain their cntext t be identified and traced. Limiting swapping t adminstrative bundaries allw unlimited scaling withut while keep cntrl cmplexity t a minimum. C-DA C-SA S-TAG 1 Client Data FCS C-DA C-SA S-TAG 2 Client Data FCS S-VID 1 S-VID 2 S-VID 2 S-VID 3 Wrkshp NGN and its Transprt Netwrks Kbe, April

17 Ethernet Prtectin Switching Link recvery f netwrks can be implemented tday using IEEE link aggregatin prtcls. Ethernet switch nde recvery tday is handled by Rapid Spanning Tree(RSTP) and Multiple Spanning Tree(MSTP). IEEE prject 802.1aq will replace MSTP with a link state prtcl fr shrtest path bridging allwing mre extensive link and nde recvery. Wrk currently nging at the G.8031 is defining Ethernet prtectin switching. Future wrk will likely extend t Ethernet ring recvery. Wrkshp NGN and its Transprt Netwrks Kbe, April

18 A Prvisined P2P P2P Ethernet Transprt Prvider Backbne Transprt is a variatin n Prvider Backbne Bridging which allws carriers t prvisin engineered and prtected Pt-Pt service instance. PBT perates by adding cnfigured rutes t a nearly standard Prvider Backbne Bridged Netwrk. The PBT prvisining and management system allws a carrier t prvisin pint-t-pint trunks and services within the Ethernet netwrk. Each trunk is identified by a 12 bit VLAN ID and a 46 bit destinatin address. PBT Prvisining and Management 802.1ah Bridges 802.1ad Bridges PBT Circuit Path Wrkshp NGN and its Transprt Netwrks Kbe, April

19 Agenda Intrductin t Metr Ethernet service netwrk Tward an IEEE Ethernet Metr Cnclusins Wrkshp NGN and its Transprt Netwrks Kbe, April

20 Cnclusins New technlgies in develpment fr Ethernet by the IEEE and thers including the ITU and MEF are breaking the barriers t scaling and mass deplyment f Ethernet as an end-t-end carrier infrastructure. The IEEE 802.1ah and assciated standards prvide the fundatin fr scaling prvider Ethernets t almst limitless size. Wrkshp NGN and its Transprt Netwrks Kbe, April

21 Thank Yu Wrkshp NGN and its Transprt Netwrks Kbe, April