SRv6 ：Technology and Deployment Use-Cases-可預期網絡論壇（21頁）.pdf

1、SRv6 Clarence FilsfilsCisco FellowTechnology and Deployment Use-CasesSimplicity Always PrevailsFurthermore with more scaleand functionality LDPRSVP-TEInter-AS Option A/B/CMPLSUDP/VxLANNSH2SRv6-Reminderjohan2011 123RF.comNetwork ProgramA network program is a list of instructions(128-bit SRv6 SID)An i

2、nstruction can be bound to any behaviorTE/FRR:END,END.XVPN:END.DX,END.DTOften a single instruction is enough and is encoded in DA(without SRH)Network ProgramDA=SID1 SRH=SID2,SID3 1st instruction2nd instruction3rd instruction4SRv6 MicroProgramAny instruction can hold a micro-programUltra-scale and mi

3、nimum MTU overheadHW linerate and widespread adoption:Custom and MerchantFacilitate legacy HW reuse100%leverage of SRH and SRv6 Network ProgramuInstruction1|uInstruction2|uInstructionNDeployments at record-speed100M SRv6 subscribers with 2.5 years of commercial serviceChina is pervasively deploying

4、SRv6100 deployments,10 with PRSoftBankIndosatChina UnicomMTN UgandaIliadChina TelecomChina BankNoiaRakutenBell CanadaCernet2LineMature industry25 HW linerate implementationsCisco Systems,Huawei,Nokia,Juniper,ZTE,Arrcus,KaloomBroadcom,Barefoot,Intel SmartNIC,Marvell,MellanoxSpirent,IxiaMultiple Inter

5、op ReportsOver a dozen open-source platformsLinux,FD.io VPP,P4,iptables,nftables,snort,SERA,ExaBGP,GoBGP,GoBMP,Contiv-VPP,Calico-VPPMature IETFProposed Standard RFC 8402SR ArchitectureRFC 8754 SRv6 DataPlaneRFC 8986SRv6 Network ProgrammingLast steps to Proposed Standard RFCISISBGPBGP-LSRich FCS road

6、mapWe started SR-MPLS in 2012,SRv6 in 2017From an FCS and deployment viewpoint,the core of any SR deployment is at parity SR-MPLS vs SRv6TILFAuLoop AvoidanceFlex-Algo:Low-Cost/Low-Delay SlicingPerfMon:Link Latency(for Low-Delay slice)ODN/AS into Flex-AlgoSeamless Inter-Domain SRv6 with summarizing a

7、nd slicingL3VPN(IPv4 and IPv6),IPv4 Internet,IPv6 Internet,PWVPN GW to interconnect“new”SRv6-VPN buildup with legacy VPN Alibaba-Cisco partnershipJoint communicated to industry:Alibaba use-case and SRv6 benefitsCollaboration on key SRv6 IETF documentsCollaboration for SRv6 SONiC/SAI/P4 developmentFi

8、rst milestone completed(Sept 21):SAI v1.9 includes a thorough model for SRv6 including uSID(micro-programs)The Deep Edge Podcast with Dennis Cai on SRv6 uSID:https:/ MING 123RF.comVPN over Best-Effort 5G Slice 12653VRF 9No SRH!Network Program:B:3:V(9)B:locator block is associated with ISIS base algo

9、(Low Cost,Best Effort)12VPN with Low-Delay 5G Slice Flex-Algo option12653VRF 9No SRH!Network Program:D:3:V(9)D:locator block is associated with Low Delay Flex-Algo13Bad DelayBad DelaySnort firewall,VPN&Low-Delay slice12653VRF 9SRH contains 1 Single SID!Network Program:D:2:SNORT,then D:3:V(9)D:locato

10、r block is associated with Low Delay Flex-Algo14Bad DelayBad DelayD:2:SNORTSeamless Incremental DeploymentAs soon as the network supports plain IPv6 forwardingA new SRv6-VPN service only requires PE upgradeTE objective can be achieved with a few well selected TE waypointsFRR is deployed incrementall

11、y15Prefix SummarizationBack to basic IP routing and summarizationNo BGP inter-AS Option A/B/CISISSummary B:2:2:/48ISISSummary B:1:1:/48ConclusionSimplicity Always PrevailsFurthermore with more scaleand functionality LDPRSVP-TEInter-AS Option A/B/CMPLSUDP/VxLANNSH18Deployment and Eco-system-record sp

12、eed100M live subscribers across 12 major deploymentsSoftbank,Iliad,China Telecom,LINE corporation,Rakuten,Indosat Ooredoo,China Unicom,CERNET2,China Bank,MTN Uganda,and NOIA NetworkMature industry25 HW linerate implementations across major vendors:Cisco Systems,Huawei,Nokia,Juniper,ZTE,Broadcom,Intel/Barefoot,Marvell,Mellanox,Arrcus,Kaloom,Spirent,IxiaProposed Standards IETF RFCRFC8402,RFC8754,RFC8986Mature open-sourceStay up-to- Part IIIComing by end CY21ask-segment-Thank you!