Cisco IOS XR Programmability for Cloud-Scale Networking

Transcription

1

2 Cisco IOS XR Programmability for Cloud-Scale Networking LABRST-2332 Santiago Álvarez, Distinguished Technical Marketing

3 Level of Expertise With Network Programmability 1. Can t spell anything. My boss made me attend! 2. Some, but I m more of a networking person 3. Some, but I m more of a programmer 4. I invented it. Any questions?

4 Agenda Model-Driven Programmability Test Bed NETCONF RESTCONF Google RPC Model-Driven APIs Resources

5 Model-Driven Programmability 5

6 Motivations for Network Programmability Speed and scale demand software automation and data analytics Rapid innovation as competitive advantage One network operator per 1000s / 10000s of complex network devices

7 Model-Driven Programmability Stack Apps APIs App1 App2 App3 Model-Driven APIs YANG Development Kit (YDK) Encoding XML JSON Protocol NETCONF RESTCONF grpc Transport Models SSH HTTP YANG Models (native, open, common) XR Data Model Database

8 Benefits of Model-Driven Programmability Model based, structured, computer friendly Multiple model types (native, common, OpenConfig, IETF, etc.) Models decoupled from transport, protocol end encoding Choice of protocol transport, protocol and encoding Model-driven APIs for abstraction and simplification Wide standard support while leveraging open source

9 Data Models Native / Common OpenConfig / IETF Cisco IOS XR supports 150+ models (config and operational) in release Models files are self-documented and ship with devices Native models provide most coverage OpenConfig and IETF models are mapped to native models Deviations document data not implemented in native model

10 Test Bed 10

11 Testbed Topology RESTCONF NETCONF grpc /24 Controller Out-of-band network LER / / / /24 LER /32 (VRF RED) /32.0 g0/0/0/ / /32 LSR1.4 g0/0/0/2.5.1 g0/0/0/ /31.3 LSR / / /32 (VRF RED) /32 IS-IS L2 Area g0/0/0/ /31 g0/0/0/ /31

12 NETCONF

13 NETCONF Protocol Overview Rich functionality to manage configuration and operational (state) data Operations defined as RPCs (request / reply) in XML Client/app initiate request towards server/device Supports running, candidate and startup configurations Capability exchange during session initiation XML Operations (RPC) SSH YANG

14 Main NETCONF Protocol Operations Operation get-config edit-config get get-schema lock unlock close-session Description Retrieve all or part of a specified configuration Loads all or part of a specified configuration (merge, replace, create, delete, remove) Retrieve all or part of running configuration and device operational data Retrieve device schema (model) Lock entire configuration datastore (e.g. candidate) Remove lock on entire configuration datastore (e.g. candidate) Request graceful session termination

15 Testbed Topology (NETCONF) Controller NETCONF /24 Out-of-band network LER / / / /24 LER2.0 g0/0/0/0.1.4 g0/0/0/2.5.1 g0/0/0/ / / /32 LSR /31.3 LSR / / /32 IS-IS L2 Area g0/0/0/ /31 g0/0/0/ /31

16 RESTCONF

17 RESTCONF Protocol Overview RESTful API for NETCONF Functional subset of NETCONF Single hierarchy of resources (data + allowed methods) Resource hierarchy rooted at restconf/ Configuration and operational data located under restconf/data Web app friendly JSON XML Operations HTTP / HTTPS YANG

18 Main RESTCONF Protocol Operations Operation GET POST PUT PATCH DELETE Description Retrieve data for a resource (config/operational) Create a configuration data resource Create or replace a configuration data resource Merge configuration data with target resource Delete a configuration data resource

19 Testbed Topology (RESTCONF) Controller RESTCONF /24 Out-of-band network LER / / / /24 LER2.0 g0/0/0/0.1.4 g0/0/0/2.5.1 g0/0/0/ / / /32 LSR /31.3 LSR / / /32 IS-IS L2 Area g0/0/0/ /31 g0/0/0/ /31

20 Google RPC (grpc) 20

21 Overview of grpc on Cisco IOS XR Google RPC provides a general (open source) RPC framework Interface definition in Cisco IOS XR specifies device operations Functional subset of NETCONF Simple client development High performance JSON Operations HTTP/2 YANG CLI

22 Protocol Operations in Cisco IDL Operation GetConfig MergeConfig DeleteConfig ReplaceConfig GetOper CliConfig ShowCmdTextOutput Description Retrieve configuration data Merge configuration data Delete configuration data Replace configuration data Retrieve operational data Merge configuration data in CLI format Retrieves CLI show-command output data

23 Testbed Topology (grpc) grpc /24 Controller Out-of-band network LER / / / /24 LER2.0 g0/0/0/0.1.4 g0/0/0/2.5.1 g0/0/0/ / / /32 LSR /31.3 LSR / / /32 IS-IS L2 Area g0/0/0/ /31 g0/0/0/ /31

24 Model-Driven APIs

25 Model-Driven APIs Simplify app development Abstract transport and encoding Generated from YANG model One-to-one correspondence between model and class hierarchy Multi-language (Python, C++, Ruby, Go, etc.) YANG Model Class Hierarchy (Python, C++, Ruby, Go)

26 Resources 26

27 Let s Recap First Model-Driven Programmability Speed and scale through automation Rich and flexible in terms of models, transports and encodings NETCONF Rich, mature protocol Relies on XML encoding RESTCONF Google RPC Cisco interface definition (device operations) Supports JSON and unstructured data (CLI) High performance Model-Driven APIs Simplify app development Abstract transport and encoding RESTful API for NETCONF Single hierarchy of resources Supports JSON and XML encoding 27

28 Resources Cisco IOS XR at DevNet ( Cisco IOS XR YANG models ( Getting Started With OpenConfig in Cisco IOS XR ( Getting Started With grpc in Cisco IOS XR ( YANG Explorer ( Python library for NETCONF clients 111pontes 28

29 Backup

30 Lab Access Lab Host: Pod: Device Pod PP Pod 01 Pod 02 Pod 03 Pod 04 Pod 05 Pod 06 Pod 07 Pod 08 Pod 09 Pod 10 Pod 11 Pod 12 Pod 13 Pod 14 Pod 15 Pod 16 Controller (VNC display) Controller (telnet port) LER1 (telnet port) LSR1 (telnet port) LSR2 (telnet port) LER2 (telnet port) Pod PP PP PP PP PP

31 Testbed Topology (NETCONF) Controller NETCONF /24 Out-of-band network LER / / / /24 LER2.0 g0/0/0/0.1.4 g0/0/0/2.5.1 g0/0/0/ / / /32 LSR /31.3 LSR / / /32 IS-IS L2 Area g0/0/0/ /31 g0/0/0/ /31

32 Call to Action Visit the World of Solutions for Cisco Campus Walk in Labs Technical Solution Clinics Meet the Engineer Lunch and Learn Topics DevNet zone related sessions

33 Complete Your Online Session Evaluation Please complete your online session evaluations after each session. Complete 4 session evaluations & the Overall Conference Evaluation (available from Thursday) to receive your Cisco Live T-shirt. All surveys can be completed via the Cisco Live Mobile App or the Communication Stations

34 Thank you

35