运行在开放硬件上的完整城域汇聚路由器。
The metro aggregation router carries MEF Carrier Ethernet, E-LINE, E-LAN, E-TREE, and E-Access, across an EVPN metro ring and hands service traffic up to the IP core. IP Infusion delivers it complete: validated open hardware from Edgecore or UfiSpace, OcNOS-SP pre-loaded, supported under one contract, with a self-protecting ring and a measured per-service SLA.
运行 OcNOS-SP 城域汇聚的运营商。
区域运营商已将城域汇聚和骨干路由迁移至基于 OcNOS-SP 的完整开放路由器，并在过渡期间与其已部署网络互通。它已在 60 多个国家超过 600 家运营商网络的生产环境中运行。
"IP Infusion's OcNOS software with Edgecore hardware were selected for providing a compelling set of features to accommodate our rapid growth. OcNOS provides an easy and common platform across different use cases, with an upgrade path from existing solutions." Werner Rades，AnschlussWerk 首席执行官
一台开放路由器即可完成城域环网的汇聚。
您可在同一台路由器上运行环网中的两个汇聚节点，从而使城域环网、运营商以太网服务和传输全部处于同一运维模式之下。EVPN 和 SR-MPLS 的深入介绍见 EVPN and SR-MPLS; the ring hands service traffic up to the IP 核心提供商边缘.
打开矢量视图，将鼠标悬停在各节点上以查看平台与业务详情。
城域节点以一套镜像扮演四种角色。
您只需为四种任务许可和适配一台设备，而不必囤备四台。一个 OcNOS-SP 镜像即可运行汇聚路由器、三层交换机、EVPN 环网节点和核心上行链路，每种角色分别许可和适配规格，因此该节点无需第二台设备即可承担新的角色。
Aggregation router
每个接入、OLT、CPE 和基站的交接都汇聚到一台路由器，并通过高密度上行传输 100G and 400G interfaces to the ring and the core.
Layer 3 switch
Routes with BGP, OSPF, and IS-IS and switches Layer 2, with VRRP and MLAG multihoming for the access and business handoff.
EVPN 城域环网节点
正在运行的业务同时接入两个环网节点，因此单个节点失效绝不会中断该业务。 EVPN 全活多归属 and a G.8032 ring instance keep one protected path around the ring.
Core uplink
将业务流量交接给运营商边缘，采用 400G-capable interface, so metro and core run one transport model.
MEF Carrier Ethernet, delivered over the EVPN ring.
The operator sells four kinds of Carrier Ethernet: private line, multipoint LAN, rooted broadcast, and wholesale handoff. This router delivers all four as MEF services over EVPN and SR-MPLS on the metro ring, so one box carries the whole service catalog.
| MEF service | Connectivity | EVPN delivery | Typical use |
|---|---|---|---|
| E-LINE (EPL, EVPL) | Point to point | EVPN-MPLS 或 VxLAN E-LINE，单归属或全活多归属 | 专用商业电路，点到点回传。 |
| E-LAN (EP-LAN, EVP-LAN) | 多点到多点 | EVPN E-LAN，单归属或全活多归属 | 面向企业或批发的多站点二层。 |
| E-TREE (rooted multipoint) | Hub and spoke | EVPN E-TREE, MPLS and VxLAN | 广播、特许经营或枢纽馈送的分发。 |
| E-Access (OVC handoff) | 运营商对运营商 | 通过 EVPN 实现批发以太网接入交接 | 面向另一家运营商的批发以太网接入。 |
MEF and MEF are marks of MEF Forum. OcNOS-SP delivers Carrier Ethernet aligned with the MEF service model.
城域环网如何在断纤时保持业务。
光纤中断或节点失效绝不应中断正在运行的客户业务，在该环网上确实如此。G.8032 绕过故障点对环网重新路由，EVPN all-active 多归属在节点失效时维持业务不中断，TI-LFA 将 SR-MPLS 流量切换到预先计算的备份路径，并由 BFD 在链路中断的瞬间触发切换。
以太网环网保护
环网在稳态下保持无环，并在链路中断瞬间自行重路由。一个 G.8032 ring instance holds one ring port blocked until a break, then unblocks it to keep one protected path, and OcNOS-SP runs G.8032 over LAG and interworks a G.8032 major ring with MLAG.
All-active 多归属
EVPN 全活多归属 attaches a service to two ring nodes at once, so the service stays up through a node loss. See the delivery detail on the EVPN technology page →
低于 50ms 的快速重路由
SR-MPLS 流量在 50ms 内即切换到备份路径，早于 IS-IS 完成重新收敛。 TI-LFA precomputes a loop-free SR backup for every destination to make that switch immediate. See SR-MPLS →
每项业务都对自己的 SLA 进行度量。
Carrier Ethernet 是按 SLA 销售的，而这台路由器对环网上的每个业务进行测量以予以证明。Y.1731 逐业务上报时延与丢包，因此运营商可向每位客户交付其承诺的确切数值。
按业务的帧时延
DMM and DMR measure two-way frame delay and delay variation on each E-LINE, E-LAN, and E-TREE, over EVPN-MPLS and VPLS, so the operator sees the delay each service delivers.
按业务的帧丢失
LMM/LMR and SLM/SLR measure frame loss per service, over a Layer 2 bridge and over VPLS, so packet loss is reported against the SLA.
Y.1731 还承载 以太网带宽通告（EBN）, so the ring signals available bandwidth to the service edge as conditions change. Delay, loss, and bandwidth notification run on the same Y.1731 service OAM the ring already carries.
汇聚路由器与三层交换机合于一台设备。
一台设备完成两项工作，因此无需再备货、布线和授权第二台交换机。它作为三层交换机终结接入和企业交接，然后作为汇聚路由器向上承载 MPLS、SR-MPLS 和 MEF 业务，并按自己的更新周期扩展出新角色。
| 角色 | Validated router | 芯片与容量 | 它为何契合该角色 |
|---|---|---|---|
| 城域汇聚 / L3 交换机 |  UfiSpace S9600-56DX |
Broadcom Qumran2c, 4.8 Tbps, 48×100G + 8×400G, deep buffer | 深缓存用于吸收微突发，并为城域提供 400G 相干上行，具备来自多家厂商的成熟互操作性。路由光上行的详细说明见 IP over DWDM. |
| 核心上行目标 |  UfiSpace S9610-36D |
14.4 Tbps core | 环网上行至 14.4 Tbps 核心。运营商边缘与核心角色运行在 IP core spoke. |
IP Infusion 交付城域汇聚路由器，运行于 43 validated platforms from Edgecore and UfiSpace, each lab-qualified with OcNOS-SP pre-loaded. See every validated platform in the 硬件兼容性列表，并将功能与硬件相匹配，请见 功能矩阵.
S9600-56DX 适用的场景
- 城域环网汇聚 with MEF services across two or more nodes.
- 400G uplink to the core, or a routed-optical uplink, see IP over DWDM.
- FTTx 与 OLT 汇聚 upstream of the access node, see broadband access.
- 基站授时 is a separate role, see mobile transport.
受保护环网上的 E-LINE 业务。
A metro E-LINE rides EVPN VPWS over the SR-MPLS underlay while a G.8032 ring protects the ring ports and a Y.1731 MEP reports the service SLA. The block below uses the real OcNOS-SP ERPS, EVPN VPWS, and Y.1731 command families with placeholder values, see the guides for the exact per-node syntax.
! 1. G.8032 (ERPS) ring across the two ring ports
g8032 ring METRO-RING
east-interface xe1
west-interface xe2
! ERP instance, control VLAN, and RPL role per the ERPS guide
! 2. EVPN VPWS (E-Line) on a mac vrf, carried over the SR-MPLS underlay
mac vrf E-LINE-100
rd <router-id>:100
route-target both <asn>:100
evpn mpls id <local-id> xconnect target-mpls-id <remote-id> host-reachability-protocol evpn-bgp E-LINE-100
! 3. Bind the access handoff (interface xe10, vlan 100) to E-LINE-100 per the EVPN VPWS guide
! 4. Y.1731 up-MEP on the service reports delay and loss
! exact ethernet cfm mep form, plus delay-measurement (DMM) and
! loss-measurement (SLM) profiles, per the OcNOS-SP Y.1731 guide每一步的作用
- The
g8032 ringwith an east and west interface protects the two ring ports, so the ring keeps one loop-free protected path. - The
mac vrfplusevpn mpls id ... xconnect target-mpls-id ...creates the E-LINE (EVPN VPWS) instance and carries it over the SR-MPLS underlay around the ring. - The access handoff binds to the E-LINE service on the access-facing port and VLAN.
- The Y.1731
ethernet cfm mep, with delay (DMM) and loss (SLM) measurement, reports the per-service SLA, so the operator measures the service it sold.
Representative OcNOS-SP configuration; angle-bracket values are placeholders. Use the OcNOS-SP ERPS, EVPN, and Y.1731 configuration guides for the exact commands and options for your release, documentation.ipinfusion.com.
每次迁移环网的一个节点。
在您逐个将节点转换到完整 OcNOS-SP 路由器的过程中，城域环网持续承载业务。基于标准的 EVPN、SR-MPLS 与 MEF 运营商以太网使新节点在整个过渡期间与既有网络互操作。
与已部署的城域网互通
OcNOS-SP 采用基于标准的 EVPN, SR-MPLS, BGP, IS-IS, and MEF Carrier Ethernet, so a new node interoperates with installed Cisco, Juniper, and Nokia equipment, and replaces ZTE.
每次迁移一个环网节点
每次将一个环网节点迁移到完整的开放路由器上，同时环网继续承载业务。割接过程保持渐进式，每个维护窗口迁移一个节点，无需整机更换。
后续增加业务与容量
随着城域网的增长，同一平台承接新业务与更高容量，因此一个节点会在一次次维护窗口中承担更多的部署职责。IP Infusion 在每一步都为路由器提供支持。
提供 Cisco IOS-XR 到 OcNOS 的 CLI 转换协助，以加速配置转换。请参见 OcNOS-SP 对比 Cisco comparison for capability and licensing detail.
开放式城域汇聚与专有城域机箱对比。
对于城域，人们担心的是开放路由器能否像专用机箱那样深入地承载运营商级以太网。它可以做到：MEF 业务、EVPN 环网和按业务 SLA 度量都在其上运行，而运营商仍可在同一份合同下从多家厂商采购硬件。
| 能力 | OcNOS-SP 城域路由器（开放） | 专有机箱（Cisco / Juniper / Nokia） |
|---|---|---|
| MEF Carrier Ethernet (E-LINE, E-LAN, E-TREE, E-Access) | ✓ | ✓ |
| 基于 MPLS 和 VxLAN 的 EVPN | ✓ details → | ✓ |
| G.8032 环网保护和 EVPN 多归属 | ✓ | ✓ |
| 按业务的 Y.1731 时延与丢包 SLA | ✓ | ✓ |
| SR-MPLS，配合 Flex-Algo 与 TI-LFA | ✓ details → | ✓ |
| 汇聚路由器与三层交换机合于一个镜像 | ✓ | ✓ |
| 运行于经过验证的开放通用芯片硬件之上 | ✓ Edgecore / UfiSpace，43 个平台 | ✓ vendor chassis only |
| 硬件与软件按各自独立的周期定价和更新换代 | ✓ | ✓ bundled |
| 由一家厂商负责硬件、软件与 RMA | ✓ one support contract | ✓ single vendor |
| 从多家硬件厂商采购设备 | ✓ | ✓ |
Cisco、IOS-XR、NCS、Juniper、Junos、ACX、Nokia 与 SR OS 是其各自所有者的商标。IP Infusion 与这些厂商无隶属关系，也不为其背书；本对比反映的是 OcNOS-SP 能力，可在 功能矩阵. To replace a proprietary metro, see the OcNOS-SP 对比 Cisco comparison.
数据手册与 SR-MPLS 简介。
OcNOS-SP 数据手册与 SR-MPLS 升级简介，可与您的团队分享。填写简短表单，PDF 即刻下载。
关于城域汇聚路由器的问题。
使用 OcNOS 升级到 SR-MPLS
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