Hardware

Class of service

• Support for classification and rewrite rules of all types (Inet-Prec/DSCP/DSCP-v6/IEEE-802.1p/IEEE-802.1ad) at the logical interface level. Supports logical interfaces classification and rewrite rules for MPLS, VPLS, Layer 3 VPN, Layer 2 circuit, CCC, IRB, and EVPN. [See Classifiers and Rewrite Rules at the Global, Physical, and Logical Interface Levels Overview.]

  Note: On IRB interfaces, only Layer 3 classification and rewrite are supported.

• Support for port shaping and scheduling with eight Virtual Output Queues (VOQs) per port and two scheduling priority levels (strict-high and low). Supports multiple strict-high priority queues (RR scheduling), multiple low-priority queues (WFQ scheduling), low latency queues (LLQ), and default deep buffers. [See Schedulers Overview for ACX Series Routers and Shared and Dedicated Buffer Memory Pools on ACX Series Routers .]

Dynamic Host Configuration Protocol

• DHCP server and DHCP relay configuration for IPv4 and IPv6 services.

  [See DHCP Overview.]

• DHCP relay deployment of EVPN over MPLS, which includes edge-routed bridging (ERB). ERB is an edge model where DHCP clients are connected and relayed in network leaf devices. The spine provider edge (PE) routers do not perform DHCP relay functions. The routers support transit spine functionality, running protocols such as BGP for integrated routing and bridging (IRB).

• Support for the following functionalities:

  • EVPN over MPLS Ethernet-LAN

  • DHCPv4 and DHCPv6 relay options

  • Stateless forward-only mode for DHCP relay over VPN

  • Anycast IP address with IRB for a relay source

  • Client VRFs only

• DHCPv4 and DHCPv6 relay agent support for MC-LAG. DHCP relay agent support includes:

  • DHCPv4 and DHCPv6 stateless forward-only option on Layer 3 static interfaces over MC-LAG.

  • DHCPv4 and DHCPv6 stateless forward-only option on IRB interfaces over MC-LAG.

  • DHCPv4 and DHCPv6 forward-snooped-clients on dual-stack configurations.

  [See DHCP Relay Agent and Enabling and Disabling DHCP Snooped Packets Support for DHCP Relay Agent.]

  [See DHCP Relay Agent in EVPN-MPLS Network.]

EVPN

• Support for the following EVPN-MPLS features on MAC-VRF instances:

  • L2 flooding for broadcast, unknown unicast, and multicast (BUM) traffic

  • Split-horizon between core interfaces

  • Data plane and control plane MAC learning and aging, and static MAC

  • MAC movement and MAC mobility on control plane only

  • MAC limiting and MAC learning

  • Input and output VLAN maps using normalization on user-to-network interfaces (UNIs)

  • Aggregated Ethernet interfaces used for UNIs and network node interfaces (NNIs)

  • Physical interfaces for VLAN tagging, stacked VLAN tagging, flexible VLAN tagging, and extended VLAN bridges using EVPN-MPLS as a service

  • Ethernet bridge mode for logical UNIs

  • VLAN ID lists, native VLAN ID-supported logical UNIs, and priority-tagged logical interfaces

EVPN

• Underlay networks with ECMP and fast reroute (FRR)

• Control-word support for EVPN

• EVPN proxy Address Resolution Protocol (ARP) and ARP suppression

• EVPN-ELAN over segment routing

  [See EVPN Feature Guide.]

• Note: Data Center feature VXLAN and EVPN-VXLAN is not supported.

• Virtual private wire service (VPWS) with EVPN signaling mechanisms and flexible cross-connect support

  [See Overview of VPWS with EVPN Signaling Mechanisms.]

• EVPN E-LAN active/active multihoming with EVPN aliasing support for ESI LAG

  [See Example: Configuring EVPN Active-Active Multihoming.]

• All-active multihoming redundancy in both Ethernet VPN–virtual private wire service (EVPN-VPWS) and EVPN-VPWS with flexible cross-connect

  [See Overview of Flexible Cross-Connect Support on VPWS with EVPN.]

• EVPN VPWS multihoming all-active for segment routing over MPLS

  [See Overview of VPWS with EVPN Signaling Mechanisms.]

• Entropy and flow label for EVPN-ELAN

  [See Configuring Entropy Labels.]

• Support for the following EVPN-MPLS features:

  • IRB with IPv4 and IPv6 addresses

  • IRB virtual gateway

  • IRB anycast gateway

  • IRB with static MAC

  • EVPN asymmetric Type 2 and symmetric Type 5 routes

  • EVPN E-LAN over BGP-LU

  • EVPN proxy ARP and ARP suppression, and NDP and NDP suppression

  • EVPN routing policies

  • Ingress virtual machine traffic optimization (VMTO)

  [See EVPN with IRB Solution Overview, Anycast Gateways, Symmetric Integrated Routing and Bridging with EVPN Type 2 Routes, Understanding EVPN Pure Type 5 Routes, EVPN Proxy ARP and ARP Suppression, and Proxy NDP and NDP Suppression, Ingress Virtual Machine Traffic Optimization, and Routing policies for EVPN.]

• Support for the following EVPN-VPWS features:

  • EVPN-VPWS FXC VLAN unaware service

  • EVPN-VPWS FXC VLAN aware service

  • EVPN-VPWS over segment routing

  • Single homing and all-active multihoming support

  • Flow-aware transport (FAT) pseudowire labels

  • Entropy labels

  [See Overview of VPWS with EVPN Signaling Mechanisms.]

Firewall filters

• Support for firewall filters and policers. You can configure firewall filters with packet match conditions for the ethernet switching, IPv4, IPv6, CCC, Any, and MPLSfamilies. In addition to packet match conditions, the ACX7020 supports the count, discard, log, syslog, and policer actions.

  [See Firewall Filter Match Conditions and Actions in ACX Series Routers (Junos OS Evolved).]

  Note: On IRB interfaces, only Layer 3 classification and rewrite are supported.

• Filter-based forwarding (FBF).

  [See Filter-Based Forwarding Overview.]

• Firewall filter protocols: MPLS, CCC, virtual private LAN service (VPLS), and Any

  Note: On IRB interfaces, only Layer 3 classification and rewrite are supported.

  [See Firewall Filters Overview, Filter-Based Forwarding Overview, Understanding Filter-Based Forwarding to a Specific Outgoing Interface or Destination IP Address, and Guidelines for gRPC and gNMI Services.]

High availability

• VRRP for IPv4 and IPv6

  [See VRRP and VRRP for IPv6 Overview.]

• BFD over label-switched paths (LSPs) or RSVP-based LSPs in a centralized mode

  [See Bidirectional Forwarding Detection (BFD) for MPLS.]

• Support for loop-free alternate (LFA) routes for OSPF and IS-IS. LFA enables IP fast-reroute capability for OSPF and IS-IS.

  [See Loop-Free Alternate Routes for OSPF Overview and Understanding Loop-Free Alternate Routes for IS-IS.]

• BFD-triggered fast reroute for unicast next hops.

  [See Bidirectional Forwarding Detection (BFD) for MPLS, session-id-change-limiter-indirect, and no-bfd-triggered-local-repair.]

Junos telemetry interface (JTI)

• Logical subinterface and Packet Forwarding Engine drop, pipe, and line-card counter sensor support for JTI

  [See Junos YANG Data Model Explorer.]

Layer 2 features

• Ethernet ring protection switching (ERPS) with G.8032 version 2

  [See Understanding Ethernet Ring Protection Switching Functionality .]

• Support for the following advanced Layer 2 (L2) features:

  • Bridge domain without a vlan-id number statement

  • Bridge domain with the vlan-id value set to None

  • Bridge domain with a single VLAN ID

  • MAC learning, aging, and limiting

  • Single-learning domain per bridge domain

  • Ethernet service types:

    • E-Line with these AC interface types: port, VLAN, Q-in-Q, VLAN list, and VLAN maps

    • E-Line

    • E-LAN

    • E-Access

    • E-Transit

  • LLDP

  • LACP

  • IRB interface

Layer 2 features

• • Link aggregation group (LAG) support with the following hashing algorithms:

    • For family multiservice, destination and source MAC addresses

    • For family inet, Layer 3 and Layer 4

    • For family inet6, Layer 3 destination and source addresses

    • For family inet6, Layer 4 destination and source ports

  • Encapsulation types:

    • extended-vlan-bridge

    • vlan-bridge

    • ethernet-bridge

  • Q-in-Q tunneling

    [See Understanding Layer 2 Bridge Domains and Q-in-Q Tunneling.]

  • Disable local switching in bridge domains.

    [See Configuring MAC Address Flooding and Learning for VPLS.]

  • Layer 2 protocol tunneling (L2PT) to send L2 protocol data units (PDUs) across the network and deliver them to devices that are not part of the local broadcast domain.

  • Storm control

    [See Understanding Storm Control.]

Layer 2 features

• Rapid Spanning Tree Protocol (RSTP), Multiple Spanning Tree Protocol (MSTP), and VLAN Spanning Tree Protocol (VSTP)

  [See Spanning-Tree Protocol Overview.]

• MAC move limit and multiple trunk ports, virtual private LAN service (VPLS), and EVPN networks

  [See Understanding MAC Limiting and MAC Move Limiting.]

• Transparent forwarding of L2CP BPDUs. Layer 2 Control Protocol (L2CP) BPDUs are transparently forwarded in hardware unless a specific protocol is configured on the incoming interface. This feature helps you configure and enable L2PT.

• VLAN sensor support

  [See Telemetry Sensor Explorer.]

  [See Understanding Layer 2 Bridge Domains on ACX Series and Q-in-Q Tunneling on ACX Series, Bridging and VLANs, and Configuring MAC Address Flooding and Learning for VPLS .]

• Multichassis link aggregation groups (MC-LAGs). The following Layer 2 features are available on MC-LAGs:

  • Layer 2 bridging for active/active and active/standby modes

  • Layer 2 unicast with and without IGMP snooping

  • Layer 3 unicast with and without IGMP snooping

  • Layer 2 multicast with and without IGMP or MLD snooping

  • Layer 3 multicast with and without IGMP or MLD snooping

  [See Understanding Multichassis Link Aggregation Groups.]

Layer 2 VPN

• Support for VPLS. The router supports a single VLAN for each virtual switch routing instance type. Junos OS Evolved does not support the family vpls option. To configure VPLS, configure the instance-type virtual-switch statement at the [edit routing-instances routing-instance-name] hierarchy level. If you configure normalized VLANs, either by not configuring VLAN IDs or by including the vlan-id none statement, then you must include the service-type single statement at the [edit routing-instances routing-instance-name protocol vpls] hierarchy level.

  [See Introduction to Configuring VPLS.]

• Support for control word and load-balancing capabilities using entropy and flow-aware transport of pseudowires (FAT) flow labels, across LDP-signaled pseudowires for virtual private LAN service (VPLS)

  [See control-word , Configuring Entropy Labels, and FAT Flow Labels Overview.]

• Support for redundant pseudowires for virtual private LAN service (VPLS). The router supports VPLS with LDP hot-standby, cold-standby model, and without BFD or CFM trigger.

  [See Redundant Pseudowires for Layer 2 Circuits and VPLS.]

• IRB support for VPLS.

  [See Configuring VPLS and Integrated Routing and Bridging.]

• Layer 2 VPN and L2 circuit support:

  • L2 circuit—Targeted LDP signaling pseudowires and interoperability between different types of supported attachment circuit for L2 circuit

  • L2 VPN circuit—BGP signaling

• MPLS fast reroute (FRR) on IGP, circuit attachment types (port, VLAN, and Q-in-Q tunneling), control word, pseudowire circuit on aggregated Ethernet interfaces, indirect next hops and composite next hops, pipe and uniform mode time-to-live (TTL), Tag Protocol Identifiers (TPIDs), and VLAN map on pop, push, or swap

  [See Understanding Layer 2 VPNs and Understanding Layer 2 VPNs and Configuring Interfaces for Layer 2 Circuits.]

• Flow-aware transport for pseudowires (FAT) label and entropy label support for Layer 2 circuit and Layer 2 VPN

  [See Configuring Entropy Labels and FAT Flow Labels Overview.]

Layer 3 features

• Support for the following Layer 3 features:

  • IP forwarding and exception packet handling

  • IEEE 802.1Q (VLAN trunk) on IRB interfaces

  • Address Resolution Protocol (ARP), neighbor discovery, unicast reverse-path forwarding (unicast RPF), and ECMP

  • LPM and fragmentation handling, ICMP redirect handling, VLAN tagging modes, neighbor solicitation, and interface-based routing

  • Longest prefix match

  • Exception packets handling

  • VLAN tagging modes

  • Integrated routing and bridging (IRB)

  • IPv4 and IPv6

The router also supports interior gateway protocols such as OSPF, IS-IS, RIP, and ECMP for IPv4 and IPv6. [See Configure ICMP Features, Enabling VLAN Tagging, Neighbor solicitation, Understanding Unicast RPF (Routers), OSPF Overview, IS-IS Overview, and RIP User Guide.]

Layer 3 VPN

Support for the following Layer 3 VPN features:

• IP-VPN services:

  • Instance-type virtual routing and forwarding (VRF) and virtual router

  • All control plane configuration options

• • Per-prefix and per-table label signaling

  • Layer 3 VPN support with ECMP

  • BGP policies support for different Layer 3 VPN use cases (for example, full mesh VPN, hub-spoke VPN, management VPN, and leaking routes)

  • Layer 3 VPN with vrt-table-label mode

  • Layer 3 VPN with chained composite mode

• Import or export of routes across local VRF and global VRF

  Note:

  Table next hop is not supported.

• Inter-autonomous system (inter-AS) options A, B, and C

  Note:

  You can deploy inter-AS option B can in a hierarchical network design within a single IGP AS.

• PE to CE routing protocols—Static, eBGP, IS-IS, OSPF, and RIP

• IPv6 Provider Edge (6PE)/IPv6 VPN routing over MPLS (6VPE) with PE-CE routing-static and PE-CE BGPv6

[See Layer 3 VPNs User Guide for Routing Devices.]

MPLS

• Support for the following MPLS features:

  • IP/MPLS infrastructure feature set for the L3VPN service

  • Basic BGP control plane features such as LDP-DOD, CSPF, and single-area CSPF

  • MPLS label stack

  • MPLS protections:

    • Fast reroute (FRR) and make-before-break (MBB)

    • Link protection

    • Node protection

  • Label-switching router (LSR)

  • Shared Risk Link Group (SRLG) for MPLS

  • RSVP label-switched path (LSP) over IPv4 including refresh reduction

  • Label Distribution Protocol (LDP) LSP over IPv4

MPLS

• RSVP 1:1

• RSVP-Traffic Engineering (RSVP-TE)

• LDP over RSVP

• Inter-autonomous system LSP intra-area LSP

  [See MPLS Applications User Guide.]

• Support for MPLS LSP statistics and RSVP-TE auto-bandwidth features. Support includes:

  • MPLS LSP statistics for the following LSP types:

    • LDP-signaled LSPs

    • RSVP-signaled LSPs

    • Static LSPs

    • Bypass LSPs

    • Container LSPs

  • RSVP-TE auto-bandwidth

[See LSP Overview, LDP Overview, RSVP Overview, and Configuring Optimized Auto-bandwidth Adjustments for MPLS LSPs.]

Multicast

• Support for multicast snooping in a VPLS for the following protocols:

  • IGMPv1, IGMPv2, and IGMPv3 snooping in VPLS

  • MLDv1 and MLDv2 snooping in VPLS

  • IGMP and MLD snooping in VPLS with integrated routing and bridging (IRB)

  • Protocol Independent Multicast support over VPLS with IRB

  [See Multicast Snooping for VPLS.]

• Support for Layer 2 multicast-related features, including IGMP and MLD snooping. You can configure IGMP snooping with IGMPv1, IGMPv2, and IGMPv3, which includes support for:

  • IGMP snooping in bridge domains

  • IGMP snooping with integrated routing and bridging (IRB) configured in bridge domains

  • MLD snooping in bridge domains

  • MLD snooping with IRB configured in bridge domains

  [See IGMP Snooping Overview and Understanding MLD Snooping.]

• Support for IPv4 multicast for Layer 3. You can configure IGMP snooping with IGMPv2 and IGMPv3, which includes support for the following:

  • Anycast RP

  • IGMP filter

  • Protocol Independent Multicast source-specific multicast (PIM SSM)

  • IGMP querier

  • PIM sparse mode (PIM SM)

    [See IGMP Snooping Overview.]

• Support for BGP MVPN. BGP over MPLS MVPN (also known as "next-generation" MVPN) runs on multipoint LDP provider tunnels, where BGP MVPN is the intra-AS and PIM-SM and multipoint LDP point-to-multipoint (P2MP) tunnels is the data plane.

  [See Multiprotocol BGP MVPNs Overview.]

• Multicast with IGMP or MLD snooping within VLANs for EVPN-MPLS

  [See Overview of Multicast Forwarding with IGMP or MLD Snooping in an EVPN-MPLS Environment.]

Network management and monitoring

• Support for port mirroring with analyzers and remote port mirroring to IP address (GRE encapsulation)

  [See Port Mirroring and Analyzers.]

• Support for SNMP

  [See SNMP Architecture and SNMP MIBs Overview.]

• Support for Dying Gasp through SNMP in case of power failure.

  [See Dying Gasp Functionality and SNMP Traps and Informs.]

Operations, Administration, and Maintenance

• Support for OAM. You can configure connectivity fault management (CFM), BFD, and the ITU-T Y.1731 standard for Ethernet service OAM. You can also configure the following features of link-fault management (LFM):

  • Discovery

  • Link monitoring

  • Remote fault detection

  [See ITU-T Y.1731 Ethernet Service OAM Overview and Introduction to OAM Link Fault Management (LFM).]

• Support for IEEE 802.1ag OAM CFM

• Support for IEEE 802.3ah and 802.1ag for OAM CFM down and up maintenance association end points (MEPs) over virtual private LAN service (VPLS)

Operations, Administration, and Maintenance

• Support for IEEE 802.3ah and 802.1ag for OAM CFM up MEPs over EVPN

  [See IEEE 802.3ah OAM Link-Fault Management Overview and IEEE 802.1ag OAM Connectivity Fault Management Overview.]

• Support for CFM and performance monitoring (Y.1731) protocols over Ethernet interfaces for bridge and inet services

  [See Ethernet OAM Connectivity Fault Management.]

• Support for native Y.1731 operational state sensors to provide statistics such as frame loss ratio, frame delay, frame delay variation, and availability for Y.1731 performance monitoring

Protection against DDoS attacks

• Support for control plane distributed denial-of-service (DDoS) protection

  [See Control Plane Distributed Denial-of-Service (DDoS) Protection Overview.]

Routing protocols

• Layer 3 and routing protocols IPv4, IPv6, BGP, IS-IS, and ARP streaming sensor support using gRPC services

• Support for unicast reverse path forwarding (unicast RPF):

  • Support for loose and strict mode

  • Support for IPv4 and IPv6

  [See Understanding Unicast RPF (Routers).]

Routing protocols

• Support for BGP flow specification (BGP flowspec).

  • The following match conditions are not supported:

    • Fragment for IPv6

    • Packet length

    • Port

    • Source and destination prefix with offset

• The following actions are not supported:

  • Community

  • Next-term

  • Routing instance

  • Sample

  • Traffic marking

  [See Understanding BGP Flow Routes for Traffic Filtering.]

• Support for configuring interface groups in BGP flowspec filters

  [See Understanding BGP Flow Routes for Traffic Filtering and Configuring BGP Flow Specification Action Redirect to IP to Filter DDoS Traffic.]

• BGP Prefix-Independent Convergence (PIC) edge support for inet and MPLS VPNs. The following features are not supported:

  • Session-based repair

  • BGP PIC over LDP over RSVP tunnel

  • BGP PIC over SR-MPLS

  • BGP PIC with RSVP

  • BGP-LU with PIC

  • BGP PIC edge protection for Layer 2 services

  • Protection with multilink failure

  [See Configuring BGP PIC Edge for MPLS Layer 3 VPNs and Use Case for BGP PIC for Inet.]

• Support for entropy label for LDP, RSVP, L3VPN, and BGP-LU

  [See Entropy label support for BGP Labeled Unicast (BGP-LU) and Configuring Entropy Labels.]

• Support for BGP transport address family or BGP Classful Transport (BGP-CT) includes:

  • Service mapping over colored transport tunnels (RSVP, IS-IS flexible algorithm) to transport classes and map service routes over an intended transport class. The transport tunnels can span multiple domains (ASs or IGP areas).

  • Network slicing and interoperability between network domains

  • IPv6 and segment routing–traffic engineering (SR-TE) color-only support

  • IPv6 and BGP service routes with a color-only mapping community

  • Enhanced transport-class configuration to provide precise resolution

  [See use-transport-class.]

Services Applications

• RFC 2544-based benchmarking tests. Support for Layer 2 reflection (bridge, Layer 2 circuit, L2VPN, EVPN-VPWS, EVPN-FXC, EVPN-MPLS, and VPLS), with family ccc or family ethernet-switching and for Layer 3 reflection (IPv4, L3VPN) with family inet. You perform RFC 2544 tests to measure and demonstrate the service-level agreement (SLA) parameters before activation of the service. The tests measure throughput, latency, frame loss rate, and back-to-back frames.

  [See RFC 2544-Based Benchmarking Tests for ACX Routers Overview.]

• RFC 5357 Two-Way Active Measurement Protocol (TWAMP) monitoring service. You can configure the TWAMP monitoring service, which sends out probes to measure network performance. TWAMP is often used to check compliance with service-level agreements. The support for this service is limited to the following features:

  • IPv4 and IPv6 source and target addresses for clients, control connections, and test sessions

  • Probe statistics and history

  • Control and test session status

  • Test session probe generation and reception, as well as reflection

Services Applications

• Timestamps set by software (the Routing Engine or the Packet Forwarding Engine) or hardware

• Error reporting through system log messages only

• Unauthenticated mode only

• Support for sFlow monitoring (ingress)

  [See sFlow Monitoring Technology and Understanding How to Use sFlow Technology for Network Monitoring.]

Source Packet Routing in Networking (SPRING) or segment routing

• Support for the following segment routing features:

  • Segment routing global block (SRGB) for OSPF, IS-IS, and fast reroute

  • Metro Ethernet services over segment routing infrastructure

Source Packet Routing in Networking (SPRING) or segment routing

• Segment routing services: L3VPN, IPv6 VPN Provider Edge (6VPE) , IPv6 Provider Edge (6PE), L2VPN, L2 circuit, and BGP-VPLS

• Static segment routing (node segment, prefix segment, adjacency, and anycast segments) for OSPF and IS-IS

• Topology Independent Loop-Free Alternate (TI-LFA) with segment routing for OSPF and IS-IS

• Unnumbered interfaces support for segment routing with OSPF

• Support for IPv6 L3VPN over IPv6 SR-TE and IPv6 underlay

• Support for flexible algorithm in OSPF and IS-IS for segment routing traffic

• Interoperability of segment routing with LDP

• Support for SRv6 micro-SIDs in IS-IS transport. You can compress multiple SRv6 addresses into a single IPv6 address (micro-SID). For use cases that need to include more than six SRv6 SIDs, micro-SIDs can help in compressing multiple IPv6 addresses.

  [See How to Enable SRv6 Network Programming in IS-IS Networks.]

Source Packet Routing in Networking (SPRING) or segment routing

• Support for BGP link-state distribution with SPRING extensions

  [See Understanding Topology-Independent Loop-Free Alternate with Segment Routing for IS-IS, Understanding Source Packet Routing in Networking (SPRING), Understanding Adjacency Segments, Anycast Segments, and Configurable SRGB in SPRING, Configure Unnumbered Interfaces, Understanding Static Segment Routing LSP in MPLS Networks, Link-State Distribution Using BGP Overview, Understanding OSPF Flexible Algorithm for Segment RoutingHow to Configure Flexible Algorithms in IS-IS for Segment Routing Traffic Engineering, and Mapping Client and Server for Segment Routing to LDP Interoperability.]

• Support for SRv6 network programming in BGP and IS-IS

  [See Understanding SRv6 Network Programming and Layer 3 Services over SRv6 in BGP and How to Enable SRv6 Network Programming in IS-IS Networks.]

• Support for SRv6 flexible algorithms in traffic engineering database (TED) and BGP Link State (BGP-LS)

  [See How to Configure Flexible Algorithms in IS-IS for Segment Routing Traffic Engineering and BGP Link-State Extensions for Source Packet Routing in Networking (SPRING).]

• SRv6 support for static SR-TE policy.

  [See Understanding SR-TE Policy for SRv6 Tunnel.]

Software installation and upgrade

• Support for secure-boot implementation based on the UEFI 2.4 standard

  [See Software Installation and Upgrade Guide.]

• Zero-touch provisioning (ZTP) support for WAN interfaces and DHCPv6 options

  [See Zero Touch Provisioning.]

Timing and synchronization

• Support for Synchronous Ethernet over a Link Aggregation Group (LAG). You can define a LAG while configuring the Synchronous Ethernet clock source on these routers.

  [See Synchronous Ethernet and PTP Overview.]

• Support for frequency synchronization using Synchronous Ethernet.

  [See Synchronous Ethernet Overview.]

Timing and synchronization

• Support for SyncE MIB and PTP MIB. ACX7020 routers support:

  • Defect and event management capabilities for timing features.

  • SNMP get, get-next, and walk management capabilities for timing features. These capabilities are enabled through the Synchronous Ethernet MIB (SyncE MIB) and Precision Time Protocol MIB (PTP MIB) timing objects.

  [See Timing Defects and Event Management on Routing Platforms and SNMP MIB for Timing on Routing Platforms.]

• Support for G.8275.1 telecom profile, Precision Time Protocol (PTP) over Ethernet encapsulation, and hybrid mode

  [See Precision Time Protocol Overview and Understanding Hybrid Mode.]

• PTP G.8275.1 support over Link Aggregation Group (LAG)

  [See G.8275.1 Telecom Profile.]

• Support for Precision Time Protocol (PTP) G.8275.1 enh and G.8275.2 enh profiles with PTP over IPv4 and IPv6 unicast. The G.8275.1 enh profile does not support unicast negotiation.

  [See PTP profiles.]

Timing and synchronization

• Support for PTP G.8275.2 enhanced profile features compliant with the International Telecommunication Union Telecommunication Standardization (ITU-T) G.8273.4 standards. The following key features are supported:

  • Ordinary clocks and boundary clocks
  • The alternate best timeTransmitter clock algorithm
  • Full domain and packet-rate ranges
  • Primary and secondary asymmetry values
  • Manual mode (no unicast negotiation) and mixed mode
  • Primary (active) and secondary link configuration.

  [See PTP Profiles.]

• Support for frequency and phase offset relaxation.

  [See ptp.]

• Support for Precision Time Protocol (PTP) Transparent Clock- Regular Transparent Clock (without SyncE) and Syntonised Transparent Clock (with SyncE).

  [See PTP Transparent Clocks and show ptp global-information.]