FRRouting/frr

Features

• BGP Protocol Implementations - Implements the BGP-4 protocol for inter-domain routing, supporting multiprotocol extensions and VPNs.
• Multiprotocol Label Switching - Implements multiprotocol label switching and label distribution to enable advanced traffic steering and VPN services.
• Network Routing Protocols - Implements and manages a comprehensive suite of standard IPv4 and IPv6 routing protocols to control traffic flow.
• Network Routing Suites - Provides a comprehensive suite of daemons implementing standard IPv4 and IPv6 routing protocols to control network traffic.
• Network Configuration Management - Implements comprehensive tools for managing, retrieving, and automating network device configurations using structured encodings.
• Atomic Batch Commits - Implements atomic batch commits to ensure configuration changes are either fully applied or entirely rolled back.
• Configuration Persistence - Ensures routing settings are persisted in a centralized file across system restarts and upgrades.
• Atomic Transactions - Coordinates management requests as locked atomic transactions to ensure consistency across backend components.
• Configuration Transaction Engines - Ensures consistency and atomicity when updating routing settings and system transitions.
• BGP Routing Implementations - Implements a full BGP protocol engine for managing inter-domain routing, route reflection, and prefix filtering.
• Distance-Vector Routing Protocols - Implements distance-vector routing using RIP, including metric manipulation and route filtering.
• Ethernet VPN Virtualization - Provides MAC and IP reachability across an underlay fabric using Ethernet VPN with VXLAN or MPLS.
• Forwarding Information Base Management - Coordinates multiple routing protocols to populate and maintain the system forwarding information base.
• Interactive Routing Shells - Provides an interactive command-line interface to execute configuration and diagnostic commands for routing protocols.
• Dual-Stack Routing - Manages interior gateway routing for both IPv4 and IPv6 using a single instance.
• IPv6 Routing Implementations - Implements routing for IPv6 using specialized protocols including RIPng, OSPFv3, and BGP.
• SRv6 Routing Implementations - Encodes network intent into packets using segment-routing headers, locators, and local identifiers.
• Link-State Path Determination - Builds a complete network map by flooding the state of local links to compute the shortest path.
• Message Bus Interfaces - Implements a messaging system that allows independent routing protocol daemons to synchronize state through a unified interface.
• MPLS Label Management - Shares label mapping data between devices to build label-switched paths for traffic forwarding.
• BGP Peer Configuration - Manages the establishment and configuration of BGP peering sessions with external routers for route exchange.
• Northbound gRPC Interfaces - Exposes a programmatic gRPC interface for configuring and monitoring routing daemons via the control plane.
• Northbound Management APIs - Provides high-level APIs that allow external controllers to programmatically manage routing data and configurations.
• OSPF Routing Implementations - Implements the Open Shortest Path First link-state routing protocol for local network path determination.
• Policy-Based Routing - Forwards traffic based on packet fields such as ports and protocols instead of relying solely on destination addresses.
• Standard Protocol Support - Utilizes industry-standard protocols to determine the optimal path for data packets across network devices.
• Route-Map Policy Engines - Provides a conditional policy engine to filter and modify routing attributes using prefix lists and matching criteria.
• Routing Protocols - Implements and manages standard IPv4 and IPv6 routing protocols to handle network traffic across diverse hardware.
• Kernel Routing Table Synchronization - Reads and updates kernel routing table entries and interface configurations using system sockets to maintain network state.
• Traffic Engineering - Distributes label switched paths and maintains a database to optimize path selection based on bandwidth.
• Traffic Routing Policies - Directs network traffic based on defined policies and nexthop groups rather than solely on destination addresses.
• BGP Route Distribution - Manages exterior gateway routing including route reflection, prefix origin validation, and traffic filtering.
• Route Filtering - Controls the flow of advertised prefixes using prefix-lists and route-maps when exporting routes to other protocols.
• BGP Route Reflection - Distributes routes to clients using route reflectors to avoid the need for a full-mesh IBGP topology.
• Kernel Routing Table Management - Updates kernel routing tables and performs interface lookups to redistribute routes between different routing protocols.
• Multiprotocol Routing - Exchanges routing information between autonomous systems using multiprotocol extensions and route reflection.
• Route Redistribution - Imports routing information from external sources or other protocols into the interior gateway protocol.
• Unified Routing Data Exchange - Transfers routing information between protocol daemons and the system kernel using a unified communication protocol.
• Virtual Routing and Forwarding (VRF) - Creates multiple isolated routing tables on a single device to allow overlapping IP addresses.
• Route Import and Export Control - Controls the movement of routing information between virtual networks and customer edge routers to manage VPN reachability.
• VRF-Aware Routing - Separates routing tables and interfaces into virtual instances to support overlapping address spaces and network isolation.
• Segment Routing Implementations - Provides label-based segment routing for IPv4 and IPv6 including global block configuration.
• Kernel Interfaces - Synchronizes routing tables and network state between the protocol suite and the underlying system kernel.
• Control Plane to Dataplane Interfacing - Communicates routing decisions to the system kernel or hardware ASICs to enforce packet forwarding rules.
• Forwarding Information Base Programming - Updates forwarding information bases using a dedicated threading model to program local kernels or hardware dataplanes.
• Kernel Networking - Extracts network information and system settings directly from the kernel network stack using interface calls.
• Kernel-User Space Interfacing - Uses system sockets and Netlink to keep the software routing table aligned with the operating system forwarding base.
• Netlink Communication - Uses Linux Netlink sockets to synchronize the software routing table with the operating system kernel.
• Routing Hook Frameworks - Provides an extensibility framework that executes Lua scripts at protocol event hooks to modify routing behavior.
• Candidate Configuration Stores - Features a two-stage configuration model that stores candidate changes before atomically committing them to the running state.
• Cross-Daemon Configuration Synchronization - Shares operational data and configuration updates between component routing daemons using a unified message-based interface.
• Candidate-to-Running Commits - Validates configuration changes in a candidate store before atomically committing them to the active running state.
• Inter-Daemon Message Bus - Registers data subtrees and handles configuration requests using a message-based interface for backend routing processes.
• Routing RIB Inspection - Inspects the link-state database, neighbor adjacencies, and interface traffic statistics via command line or JSON.
• RIB Processing Scripts - Executes Lua scripts within the routing information base process to handle dataplane results.
• Configuration Interfaces - Provides a command-line interface to manage and define operational parameters for routing protocols.
• Routing Configuration Importers and Exporters - Supports importing and exporting routing configurations using structured JSON and XML formats for backup and migration.
• Routing Protocol Extensions - Runs custom Lua scripts via hook calls to extend or modify the internal behavior of routing protocols.
• Unified Configuration Files - Consolidates configuration settings from multiple routing daemons into a single, unified persistent file.
• Control and Data Plane Separation - Separates the control plane from the data plane to delegate packet transmission to external hardware or software.
• Daemon Management - Provides a unified shell for controlling and configuring the various background routing protocol daemons.
• Incremental Configuration Updates - Calculates the difference between a target configuration file and the active state to apply only necessary changes.
• Route Priority Assignments - Assigns numeric priority values to routes to determine their installation order in the routing information base.
• Authenticated Peer Connections - Verifies the identity of remote routers using keychains and cryptographic algorithms for trusted peerings.
• Automated Router Instantiation - Automatically generates router instances and settings by detecting available system network interfaces and devices.
• Custom Metrics Routing - Adjusts the cost of reaching destinations via custom metrics to influence the selected network path.
• BGP Path Manipulation - Modifies autonomous system numbers in the BGP path using access lists and route-maps to influence route selection.
• BGP Prefix Origin Validation - Verifies that the originating system of a prefix is authorized via RPKI cache servers.
• Bidirectional Forwarding Detection - Implements Bidirectional Forwarding Detection to rapidly detect path failures between adjacent devices.
• Centralized Routing Daemon Configuration - Provides a single northbound API to apply standardized configurations across all routing protocol daemons.
• Group Membership Management - Tracks the lifecycle and state of dynamic multicast group memberships to manage network reachability.
• Protocol Debugging - Traces protocol activity with packet dumps and event logging to troubleshoot routing and membership issues.
• eBGP Policy Enforcement - Requires incoming and outgoing filters for external BGP sessions to ensure compliance and block routes.
• EIGRP Routing Implementations - Implements the Enhanced Interior Gateway Routing Protocol (EIGRP) to exchange information and maintain network topology.
• Equal-Cost Multi-Path Routing - Implements equal-cost multi-path for load balancing and configures split-horizon to prevent routing loops.
• EVPN Multihoming - Bonds links across multiple provider edges using Ethernet Segments to provide network redundancy and load sharing.
• L3VPN Implementations - Distributes VRF-specific MPLS labels and routes using VPN SAFI to support isolated virtual networks.
• Next Hop Tracking - Handles inter-domain routing operations including next hop tracking and monitoring protocols.
• Fast Reroute Mechanisms - Ensures rapid convergence during failures by using loop-free alternates for link and node protection.
• FIB Export Mechanisms - Pushes the forwarding information base to a hardware fast path or external manager via system network links.
• First Hop Redundancy - Provides high availability by allowing backup routers to take over a virtual IP address if the primary fails.
• Static Route Definitions - Provides the ability to manually define static routes and gateways for specific network destinations.
• Conditional Static Routes - Provides the ability to install or remove static routes based on the operational state of a network session.
• Multicast Group State Monitoring - Provides visibility into multicast neighbors, lookups, kernel installations, and group membership statistics.
• IS-IS Routing Implementations - Manages intermediate system to intermediate system (IS-IS) routing for IPv4 and IPv6 across network areas.
• Traffic Authentication - Secures IS-IS communication between routers using clear text or hashed passwords.
• Large-Scale Routing Table Management - Processes full internet routing tables across diverse hardware ranging from single-board computers to commercial routers.
• SRv6 Layer 3 Service Deployments - Attaches identifiers to routes to use SRv6 as a backend for virtual private networks.
• LDP Session Security - Protects LDP routing exchanges using passwords and TTL security to prevent spoofing.
• Link-State Topology Export - Exports topology information to controllers or other speakers using link-state protocols.
• Loop-Free Alternate Protections - Provides fast reroute protection for interfaces by calculating topology-independent alternate paths.
• Multi-Instance Routing Process Support - Supports running multiple independent routing protocol instances on a single system for separate management.
• Interdomain Multicast Coordination - Exchanges source-active information between rendezvous points using the Multicast Source Discovery Protocol.
• Multicast Routing Management - Coordinates the distribution of multicast data to multiple recipients using PIM and MSDP across routing domains.
• Multicast Traffic Forwarding - Intercepts and redirects multicast packets to specific network addresses to support the operational needs of routing protocols.
• Reverse Path Forwarding - Maintains a dedicated multicast table to execute reverse path forwarding lookups and ensure traffic arrives on the correct interface.
• Multicast Listener Discovery - Processes reports and queries on network interfaces to track group memberships and manage listener state.
• Multicast Traffic Filtering - Restricts multicast joins and reports using lists and route-maps to define multicast boundaries.
• Network Addressing - Manages the assignment and removal of IP prefixes and MAC addresses for virtual network endpoints.
• Network Diagnostic Utilities - Executes system utilities such as ping, traceroute, and mtrace to verify connectivity and trace packet paths.
• BGP Graceful Restarts - Maintains routing forwarding states during restarts to minimize traffic disruption and avoid unnecessary reconvergence.
• Convergence Acceleration - Tears down sessions immediately when a peer becomes unreachable to bypass hold timers and achieve faster failover.
• CIDR Advertisement Filtering - Controls which summary advertisements are announced to or received from specific areas using filtering lists.
• Traffic Optimization - Controls traffic patterns by setting overload bits and adjusting interface metrics to shift traffic off a router.
• Network Route Summarization - Implements aggregation of contiguous network prefixes into single announcements to optimize routing tables.
• BUM Traffic Optimization - Uses multicast in the underlay network to optimize the forwarding of broadcast, unknown unicast, and multicast traffic.
• Anycast Routing - Assigns a common MAC address across multiple tunnel endpoints to enable seamless host mobility via anycast.
• Network Traffic Engineering - Optimizes data paths using Segment Routing traffic engineering policies based on endpoints and colors.
• Traffic Engineering Database Resolutions - Maps prefixes or adjacencies to labels using a specialized traffic engineering database.
• Routing Data Streams - Streams routing information and operational data through structured interfaces for external programmatic access.
• Interface Authentication - Authenticates OSPF routing packets using passwords and cryptographic key chains to prevent unauthorized adjacency.
• Traffic Engineering - Coordinates OSPF routing with advanced support for graceful restart and loop-free alternates.
• Dynamic Path Calculations - Implements dynamic path optimization by requesting optimized segment lists from remote computation elements.
• Rendezvous Point Discovery - Automatically discovers rendezvous point addresses embedded within multicast group addresses.
• Rendezvous Point Management - Configures static or dynamic rendezvous points using manual assignment or bootstrap mechanisms for multicast coordination.
• PIM Neighbor Management - Establishes and manages PIM neighborships on specified interfaces with support for neighbor filtering and timers.
• Prefix List Filtering - Restricts network traffic using prefix lists that match IP prefixes based on exact lengths or range boundaries.
• Recursive Nexthop Resolutions - Implements an iterative lookup process to resolve indirect routing targets until a directly connected interface is reached.
• ECMP Nexthop Management - Groups multiple next-hops together to distribute traffic across paths using weights and backup groups.
• Route Flap Dampening - Suppresses unstable routes using penalty thresholds to reduce routing churn and prevent network instability.
• Route Metric Manipulation - Modifies the distance or cost associated with routes to influence optimal path selection.
• Router Capability Advertisements - Broadcasts path computation element details and router-specific information using link-state advertisements.
• Not-So-Stubby Area Configurations - Provides specialized OSPF area configurations that allow external route redistribution while maintaining stub properties.
• OSPF Area Summarization - Aggregates multiple intra-area paths into a single summary announcement to reduce routing table size.
• Routing Peer Profiles - Provides reusable configuration sets to maintain consistent session settings across multiple routing peers.
• Protocol Session Synchronization - Restores or tears down protocol sessions when link failures occur to maintain network stability.
• LDP - Maintains authenticated TCP sessions and keepalive timers with neighboring devices for LDP label exchange.
• Shortest Path First Tuning - Provides tuning of SPF calculation delays and hold times to optimize convergence speed versus processor load.
• Layer 2 VPNs - Interconnects remote sites across a label-switched network to allow them to share the same broadcast domain.
• Routing Table Synchronization - Implements synchronization of routes from alternate routing tables into the main unicast or multicast routing information base.
• Data Flooding - Shares traffic engineering parameters and router addresses using opaque link-state advertisements.
• Flexible Routing Algorithms - Computes parallel routing paths using custom constraints and metric types to meet diverse traffic requirements.
• Policy Synchronization - Implements routing policies pushed from a remote controller via a specialized communication protocol.
• IS-IS Traffic Engineering - Implements IS-IS routing with advanced support for traffic engineering and fast-reroute capabilities.
• BGP Message Mirroring - Copies BGP messages verbatim from neighbors to a monitoring station to provide a raw feed of activity.
• Conditional Route Advertisements - Triggers the advertisement of specific routes based on the presence or absence of other monitored prefixes.
• Route Aggregation - Combines multiple specific prefixes into a single aggregate address to reduce routing table size.
• Route Summarization - Combines multiple specific network prefixes into a single aggregate route announcement.
• BGP Monitoring Data Export - Sends routing statistics, route mirroring, and monitoring data from routers to network management entities.
• BGP Route Views - Maintains independent sets of routing information for distribution without installing them into the kernel table.
• Community Policy Application - Uses BGP community tags to implement complex network routing policies through route tagging and filtering.
• Route Filtering - Restricts accepted or advertised routes on specific interfaces using access and prefix lists.
• Traffic Distribution - Distributes traffic across multiple equal-cost paths by installing multiple nexthops for a single route.
• Unequal Cost Multipathing - Implements unequal cost multipathing by distributing traffic based on path weights and link-bandwidth communities.
• Weighted Multipath Distribution - Configures multiple nexthops for a single destination and assigns weights to proportionally distribute traffic.
• Multihoming Implementations - Implements all-active multihoming using Ethernet segments to provide network redundancy and load balancing.
• Integrated Routing and Bridging - Executes symmetric or asymmetric integrated routing and bridging to route traffic between different virtual routing instances.
• L2 and L3 Virtual Private Networking - Separates networking contexts using virtual routing and forwarding to associate specific interfaces and routing tables.
• Virtual Router Redundancy Management - Implements the Virtual Router Redundancy Protocol (VRRP) to provide high availability and seamless failover.
• VNI Mappings - Configures mappings for EVPN-VXLAN to scale the number of virtual network identifiers using a single device.
• Route Leaking - Copies routes between different unicast VRFs or from a VPN RIB to connect private domains.
• IPv4 and IPv6 Unicast and Multicast Routing - Routes IPv4 and IPv6 unicast and multicast traffic with support for VRFs and EVPN.
• Multi-Autonomous System Isolation - Associates separate BGP autonomous systems with unique virtual routing instances for simultaneous operation.
• Prefix Export Mechanisms - Advertises IPv4 and IPv6 unicast prefixes from virtual routing instances as Type-5 EVPN routes.
• SRv6 Support Enablements - Extends routing capabilities to support segment routing over IPv6 using locators and automated identifier allocation.
• YANG Model RPCs - Triggers remote procedure calls defined in YANG models to execute operational tasks on the routing suite.
• Routing Data Models - Uses YANG to create structured data models for a consistent and validated northbound configuration interface.
• Virtual Network Management - Controls routing and forwarding information between virtual adapters and endpoints for Layer 2 and 3 networks.
• Network Namespace Isolation - Runs the protocol suite within distinct network namespaces to compartmentalize routing logic.
• AS Path Validation - Denies BGP updates from external peers that do not list their own ASN at the start of the path.
• Route Leak Detection - Detects and mitigates route leaks by assigning roles to BGP peers and analyzing path attributes.
• Routing Adjacency Authentication - Authenticates communication between routers using hashed passwords to prevent unauthorized peerings.
• Network Traffic Filtering - Implements packet matching based on source and destination IP addresses to permit or deny network traffic.
• BGP Flowspec Filtering - Implements BGP Flowspec to distribute complex traffic filtering rules for redirecting or discarding traffic at the network edge.
• Routing Protocol Authentication - Secures RIP routing exchanges using plain text or hashed MACs to prevent unauthorized route injections.
• Configuration Versioning - Maintains a history of configuration commits to allow restoration of previous system states.
• Lua Scripting Frameworks - Provides a Lua scripting framework that executes custom scripts at internal hooks to modify routing behavior and monitor events.
• SRv6 Traffic Routing - Forwards traffic through a sequence of segments using specified encapsulation behaviors.
• Availability Monitoring - Detects connectivity failures between routers using fast hello packets to trigger rapid convergence.
• Automatic Crash Recovery - Monitors routing processes and restarts them automatically upon failure to maintain continuous network availability.
• BGP Monitoring Protocol (BMP) Management - Transports BGP monitoring data to remote collectors via active outbound connections or passive listeners.
• Event Monitoring - Tracks neighbor events, nexthop changes, and route redistribution to validate protocol stability in debug logs.
• Log Streaming - Displays asynchronous log messages from routing daemons to the terminal in real-time.
• Path Performance Monitors - Uses seamless bidirectional forwarding detection to quickly provision and monitor network paths between nodes.
• Routing Daemon Performance Monitors - Tracks CPU usage and memory allocation across routing daemons to identify performance bottlenecks and resource leaks.
• Network Health Monitors - Integrates with management agents to report health metrics and send traps for network event notifications.
• Protocol State Inspection - Provides visibility into IS-IS adjacency states, the link-state database, network topology, and routing tables.
• Protocol Debugging Logs - Toggles detailed logging for specific protocol components such as flooding, neighbor interactions, and calculations.
• Protocol Execution Tracing - Injects tracepoints into the routing process to monitor internal state and debug protocol behavior.
• Routing Protocol Statistics - Transmits periodic counter messages and routing statistics to external management entities for real-time monitoring.
• Cluster Topology Monitors - Displays the current status of neighbors, associated interfaces, and the topology table to verify reachability.
• Routing Table Change Monitoring - Tracks and reports updates for specific address families to provide visibility into routing table changes.
• Router Identifiers - Sets a unique and consistent router identifier used across all daemons and virtual routing instances.
• Routing Event Debugging - Traces packet dumps, calculations, and adjacency events to troubleshoot protocol instability or convergence issues.
• SNMP Management - Exposes routing state and device metrics through the Simple Network Management Protocol for remote monitoring.
• Status Monitors - Inspects current routes, protocol status, and packet-level events through terminal commands and debugging logs.
• System Configuration Rollbacks - Reverts the running database to a previous known-good state using a history of commit identifiers.
• Routing Event Automations - Executes custom Lua scripts via hook calls to automate responses to routing events.

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