I2RS

This document defines a YANG data model for Layer 2 network topologies. In particular, this data model augments the generic network and network topology data models with topology attributes that are specific to Layer 2.

This document defines a YANG data model for fabric topology in data- center networks and represents one possible view of the data-center fabric. This document focuses on the data model only and does not endorse any kind of network design that could be based on the abovementioned model.

Routing and routing functions in enterprise and carrier networks are typically performed by network devices (routers and switches) using a Routing Information Base (RIB). Protocols and configurations push data into the RIB, and the RIB manager installs state into the hardware for packet forwarding. This document specifies an information model for the RIB to enable defining a standardized data model. The IETF's I2RS WG used this document to design the I2RS RIB data model. This document is being published to record the higher- level information model decisions for RIBs so that other developers of RIBs may benefit from the design concepts.

This document defines a YANG data model for the Routing Information Base (RIB) that aligns with the Interface to the Routing System (I2RS) RIB information model.

This document defines an abstract (generic, or base) YANG data model for network/service topologies and inventories. The data model serves as a base model that is augmented with technology-specific details in other, more specific topology and inventory data models.

This document defines a YANG data model for Layer 3 network topologies.

This document presents security-related requirements for the Interface to the Routing System (I2RS) protocol, which provides a new interface to the routing system described in the I2RS architecture document (RFC 7921). The I2RS protocol is implemented by reusing portions of existing IETF protocols and adding new features to them. One such reuse is of the security features of a secure transport (e.g., Transport Layer Security (TLS), Secure SHell (SSH) Protocol, Datagram TLS (DTLS)) such as encryption, message integrity, mutual peer authentication, and anti-replay protection. The new I2RS features to consider from a security perspective are as follows: a priority mechanism to handle multi-headed write transactions, an opaque secondary identifier that identifies an application using the I2RS client, and an extremely constrained read-only non-secure transport.

"An Architecture for the Interface to the Routing System" (RFC 7921) abstractly describes a number of requirements for ephemeral state (in terms of capabilities and behaviors) that any protocol suite attempting to meet the needs of the Interface to the Routing System (I2RS) protocol has to provide. This document describes, in detail, requirements for ephemeral state for those implementing the I2RS protocol.

Traditionally, routing systems have implemented routing and signaling (e.g., MPLS) to control traffic forwarding in a network. Route computation has been controlled by relatively static policies that define link cost, route cost, or import and export routing policies. Requirements have emerged to more dynamically manage and program routing systems due to the advent of highly dynamic data-center networking, on-demand WAN services, dynamic policy-driven traffic steering and service chaining, the need for real-time security threat responsiveness via traffic control, and a paradigm of separating policy-based decision-making from the router itself. These requirements should allow controlling routing information and traffic paths and extracting network topology information, traffic statistics, and other network analytics from routing systems.

This document proposes meeting this need via an Interface to the Routing System (I2RS).

This document describes the IETF architecture for a standard, programmatic interface for state transfer in and out of the Internet routing system. It describes the high-level architecture, the building blocks of this high-level architecture, and their interfaces, with particular focus on those to be standardized as part of the Interface to the Routing System (I2RS).

This document describes a framework for traceability in the Interface to the Routing System (I2RS) and the information model for that framework. It specifies the motivation, requirements, and use cases, and defines an information model for recording interactions between elements implementing the I2RS protocol. This framework provides a consistent tracing interface for components implementing the I2RS architecture to record what was done, by which component, and when. It aims to improve the management of I2RS implementations, and can be used for troubleshooting, auditing, forensics, and accounting purposes.

This document provides requirements for a service that allows client applications to subscribe to updates of a YANG datastore. Based on criteria negotiated as part of a subscription, updates will be pushed to targeted recipients. Such a capability eliminates the need for periodic polling of YANG datastores by applications and fills a functional gap in existing YANG transports (i.e., Network Configuration Protocol (NETCONF) and RESTCONF). Such a service can be summarized as a "pub/sub" service for YANG datastore updates. Beyond a set of basic requirements for the service, various refinements are addressed. These refinements include: periodicity of object updates, filtering out of objects underneath a requested a subtree, and delivery QoS guarantees.