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Ciena’s 5166 Router is purpose-built for 5G networks that converge 4G/5G fronthaul, midhaul, and backhaul (xHaul) networks onto a common, simpler infrastructure. With dense 1/10/25GbE to 100/200/400GbE aggregation and support for both hard network slicing (FlexEthernet) and soft network slicing (Segment Routing), the 5166 is the ideal platform to simplify and de-risk the unique 4G to 5G journeys of mobile and wholesale operators.


No. 1

Temperature-hardened (-40°C to +65°C) for temperature-challenged or space-constrained locations

No. 2

32 x 1/10/25GbE and 2 x 100/200/400GbE fixed ports

No. 3

L1/L2/L3 low latency switching

No. 4

Service isolation using FlexEthernet (FlexE)

No. 5

Carrier Ethernet, IP routing, SR-MPLS, and SRv6 ready

No. 6

Hardware-assisted routing and switching OAM scaled to deliver 25GbE services with guaranteed SLA differentiation

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  • + Interfaces
    • Ethernet Ports

      • 32 x 1GbE/10GbE/25GbE SFP28 ports
      • 2 x 100GbE/200GbE/400GbE QSFP-DD
        -OIF FlexEthernet (FlexE) Implementation Agreement v1.1 and v2.0
      • PON SFP+ Support


      • 1 x USB-C Off-switch memory
      • 1 x USB-C Console
      • 1 x RJ45 Time-of-Day (ToD + 1PPS in/out)
      • 1 x SMB Phase input (1 pps or 10MHz in/out)
      • 1 x SMB GNSS antenna
      • 1 x RJ45 Management (MGMT)


      • IEEE 802.1D MAC Bridges
      • IEEE 802.1p Class of Service (CoS) prioritization
      • IEEE 802.1Q VLANs
      • IEEE 802.1ad Provider Bridging (Q-in-Q) VLAN full S-VLAN range
      • VLAN tunneling (Q-in-Q) for Transparent LAN Services (TLS)
      • Layer 2 Control Frame Tunneling
      • IEEE 802.1ax Link Aggregation (LAG): Active/Active; Active/ Standby
      • IEEE 802.3ad Link Aggregation Control Protocol (LACP)
      • Jumbo frames up to 9216 bytes
      • IEEE 802.3-2018 IEEE Standard for Ethernet and supporting following rates
        -IEEE 802.3z-1998 Gigabit Ethernet
        - IEEE 802.3ab-1999 1000Base-T via copper SFP
        - IEEE 802.3ae-2002 10Gb/s
        - IEEE 802.3ba-2010 100Gb/s
        - IEEE 802.3by-2016 25Gb/s
        - IEEE 802.3bs-2017 200Gb/s and 400Gb/s
  • + Carrier Ethernet OAM
    • EVC Ping (IPv4)
    • IEEE 802.1ab-2006 Link Layer Discovery Protocol (LLDP)
    • IEEE 802.1ag-2007 Connectivity Fault Management (CFM)
    • IEEE 802.3ah-2004 EFM Link-fault OAM
    • ITU-T Y.1731 Performance Monitoring
  • + Synchronization
    • External Timing Interfaces
      -ITU-T G.703 Frequency in or out (2.048 MHz, and 10 MHz)
      -ITU-T G.703 1pps and ToD in or out
    • Integrated GNSS receiver
    • ITU-T G.8262/G.8264 EEC option1 and option2
    • ITU-T G.8275.1 full timing support T-GM, T-BC and T-TSC
    • G.8273.2 clock, Class C
    • G.8275.2 Telecom Profile*
    • Stratum 3E oscillator
  • + Networking Protocols
    • ISO10598 IS-IS intra-domain routing protocol
    • OSFP Segment Routing extension
    • OSFP TI-LFA Topology Independent Fast Reroute using Segment Routing
    • RFC1195 Use of OSI Is-Is for Routing in TCP/IP and Dual Environments
    • RFC1997 BGP Community Attribute
    • RFC2328 OSPF Version 2
    • RFC3630 Traffic Engineering (TE) extensions to OSPF Version 2
    • RFC4577 OSPF as the Provider/Customer Edge Protocol for BGP/MPLS IP Virtual Private Networks
    • BGP Prefix Independent Convergence
    • EVPN FXC draft-ietf-bess-evpn-vpwsfxc-03.txt
    • RFC2698 A Two Rate Three Color Marker
    • RFC2865 Remote Authentication Dial in User Service (RADIUS)
    • RFC3031 Multiprotocol Label Switching Architecture
    • RFC3032 MPLS label stack encoding
    • RFC6478 Pseudowire Status for Static Pseudowires
    • RFC7769 Media Access Control (MAC) Address Withdrawal over Static Pseudowire
    • RFC4762 : Virtual Private LAN Service (VPLS) Using Label Distribution Protocol (LDP) Signaling (HVPLS)
    • Hierarchical VPLS (H-VPLS)
    • RFC6073 : Segmented Pseudowire
    • RFC4664 Framework of L2VPN (VPLS/VPWS)
    • RFC5654 MPLS-Transport Profile (TP)
    • RFC3107 Support BGP carry Label for MPLS
    • RFC4271 A Border Gateway Protocol 4 (BGP-4)
    • RFC4360 BGP Extended Communities Attribute
    • RFC4364 BGP/MPLS IP Virtual Private Networks (VPNs)
    • RFC4456 BGP Route Reflection: An Alternative to Full Mesh Internal BGP (IBGP)
    • RFC4632 Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan
    • RFC4760 Multiprotocol Extensions for BGP-4
    • RFC4762 Virtual Private LAN Service (VPLS) Using Label Distribution Protocol (LDP) Signaling (HVPLS)
    • RFC5004 Avoid BGP Best Path Transitions from One External to Another
    • RFC5036 LDP Specification
    • RFC5037 Experience with the LDP protocol
    • RFC5301 Dynamic Hostname Exchange Mechanism for IS-IS
    • RFC5302 Domain-Wide Prefix Distribution with Two-Level IS-IS
    • RFC5303 Three-Way Handshake for IS-IS Point-to-Point Adjacencies
    • RFC5309 Point-to-Point Operation over LAN in Link State Routing Protocols
    • RFC5396 Textual Representation of Autonomous Systems (AS) Numbers
    • RFC5398 Autonomous System (AS) Number Reservation for Documentation Use
    • RFC5492 Capabilities Advertise with BGP-4
    • RFC5561 LDP Capabilities
    • RFC5668 4-Octet AS Specific BGP Extended Community
    • RFC6241 Network Configuration Protocol (NETCONF)
    • RFC6310 Pseudowire (PW) Operations, Administration, and Maintenance (OAM) Message Mapping
    • RFC6793 BGP Support for Four-Octet Autonomous System (AS) Number Space
    • RFC7737 Label Switched Route (LSP) Ping and Traceroute Reply Mode Simplification
    • RFC4448 Encapsulation Methods for Transport of Ethernet over MPLS Networks (PW over MPLS)
    • RFC4665 Service Requirement of L2 VPN
    • RFC6391 Flow-Aware Transport of Pseudowires over an MPLS Packet Switched Network
    • RFC8469 Ethernet Control Word
    • RFC8029: Detecting Multiprotocol Label Switched (MPLS) Data-Plane Failures
    • RFC8287: Label Switched Path (LSP) Ping/Traceroute for Segment Routing (SR)
    • RFC6426: MPLS On-Demand Connectivity Verification and Route Tracing
    • RFC7911 Advertisement of Multiple Paths in BGP
    • RFC8214 Virtual Private Wire Service Support in Ethernet VPN
    • SR-MPLS TI-LFA Topology Independent Fast Reroute using Segment Routing draftietfrtgwg-segment-routing-ti-lfa-03
    • RFC5880 Bidirectional Forwarding Detection (BFD)
    • RFC5881 Bidirectional Forwarding Detection (BFD) for IPv4 and IPv6 (Single Hop)
    • RFC5883 Bidirectional Forwarding Detection (BFD) for Multihop Paths
    • RFC5884 Bidirectional Forwarding Detection (BFD) for MPLS Label Switched Paths (LSPs)
  • + Network Management
    • Alarm Management and Monitoring Configuration
    • Event and Alarm Notification/Generation Comprehensive Management
      -Via CLI Management
      - Via Netconf/YANG Models
    • gRPC-based Streaming telemetry
    • IPv4 and IPv6 Management Support
    • IPv4 Management ACL (in-band)
    • IPv6 Management ACL (in-band)
    • RFC2131 DHCP Client
    • RFC3315 DHCPv6 Client
    • RFC6614 RadSec Client
    • RFC5425 Syslog over TLS
    • SNMPv2 Trap
    • SNMPv2 GET
    • RFC 3046 DHCP Relay
    • RFC 5905 NTP Client
    • Secure File Transfer Protocol (SFTP)
    • Secure Shell (SSHv2)
    • RFC8572 Secure Zero-Touch Provisioning (SZTP)
    • Software upgrade via FTP, SFTP
    • Syslog Accounting
    • TACACS + AAA
    • Web GUI
  • + Physical Characteristics
    • Dimensions

      • 17.36"(W) x 9.96"(D) x 1.73"(H)
      • 441 mm (W) x 253 mm (D) x 44 mm (H)
      • ETSI EN 300 132-2
      • ETSI EN 300 132-3


      • AC variant: 11.2 lbs; 5.2 kg
      • DC variant: 11.2 lbs; 5.2 kg


      • DC input: -48 Vdc (nominal)
      • AC input: 100 Vac, 240 Vac (nominal)

      Standards Compliance

      • Emissions and Immunity
        • CISPR 24 Class A
        • CISPR 32 Class A
        • CISPR 35 Class A
        • ETSI EN 300 386
        • ETSI EN 301 489-1
        • ETSI EN 301 489-19
        • ETSI EN 303 413
        • ETSI EN 55032
        • ETSI EN 55035
        • GR-1089 Issue 6
        • FCC Part 15 Subpart B, Class A
        • Industry Canada ICES-003 Class A
        • VCCI Class A
        • NEBS (Network Equipment-Building System)
        • LEVEL 3 certification
        • GR-63 Issue 5


      • ANSI/UL 60950-1 2nd edition / ETSI EN 60950-1, A1:2011 and A2:2014
      • CAN/CSA-C22.2 No. 60950-1, Amd 1:2011, Amd 2:2014
      • EN 62368-1:2014+A11:2017 and
      • CSA/UL 62368-1:2014
      • IEC 60825-1
      • IEC 60825-2


      • ETSI EN 300-019-2-1
      • ETSI EN 300-019-2-2
      • ETSI EN 300-119-3
      • GR-3108 Class 2 / ETSI EN 300-019-3-3 Class 3.2
      • NEBS Level 3 CO (GR-63 Core)
      • RoHS2 Directive (2011/65/EU)
      • WEEE 2012/19/EU

      Operating Temperature

      • -40oF to +149oF (-40oC to +65oC)

      Storage Temperature

      • 40oF to +158oF (-40oC to +70oC)


      • Non-condensing 5% to 90%
  • + Service Security
    • Broadcast Containment Egress Port Restriction
    • Hardware-based DOS Attack Prevention Layer 2, 3, 4 Protocol Filtering
    • User Access Rights Local user authorization

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