A presentation given at APRICOT 2015 during the SDN Panel session.

1. Copyright©2015 NTT corp. All Rights Reserved.
Ryu SDN Framework
FUJITA Tomonori
NTT Software Innovation Center
Ryu Project Lead

2. 2Copyright©2015 NTT corp. All Rights Reserved.
• What’s Ryu?
• Use cases
• #1 Cloud and MPLS VPN automation
• Whitebox switch
• #2 BMP Server
• #3 SDN IX DoS mitigation
• Future Plans
Agenda

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• OSS SDN Framework founded by NTT
• Python library for SDN
• Apache v2 license
• More than 400 mailing list subscribers
• Features
• OpenFlow
• Version 1.0, 1.2, 1.3, 1.4, 1.5 (in progress)
• Parsing and building various protocols packets
• IP, TCP, UDP, MPLS, OSFP, PBB, etc
• BGP, VRRP, BFD, BMP
• BGP speaker supports BGP4 and MPBGP (v6 and
MPLS/VPN)
What’s RYU?

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Who uses?
and more…

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Use case #1: Cloud and MPLS VPN
MPLS L3 VPNOF
Switch
Software inside the switch
OF
Controller
BGP
Speaker
eBGP
Tenant
Network
vRouter
Direction VLAN Prefix VPN Label
DC -> VPN Match & Pop Push
VPN <- DC Push Match & Pop
Info from Cloud system
Info from BGP
Cloud
Orchestration
System
Used in production as
of 2014/10
PE
Customers can manage cloud and
network settings via the cloud portal and
the change are reflected immediately to
the gateway switch

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Use case #1: lessons learned
Ryu (OpenFlow + BGP) + OpenFlow
Whitebox Switch
=
Router fully easily integrated with
the existing infrastructure
• OpenFlow is not a must (one of southbound protocols)
• Whitebox Switch + Linux OS enables this SDN

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• Merchant silicon + Linux OS
• Commodity hardware switch from ODMs in Taiwan
• Whatever software you can install
• Routing (BGP, etc)
• Monitoring
• Automation
Whitebox Switch
• Vendor provides BGP new feature timely?
• You still like to monitor via SNMP?
• You can automate switch configuration with the existing
systems?
Facebook developed their original
switch (Accton manufactured)

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• BGP Monitoring Protocol
• Monitoring Adj-RIBs-In changes
Use case #2 BMP Server
BGP
Peer
BGP
Peer
Adj-RIBs-In
Adj-RIBs-In
Local RIB
Filter
Filter
BGP router
Ryu BMP server
You could modify Ryu BMP server to send
notification via email, tweet, etc when something
(strange received route, etc) happens

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• Blocking traffic at Internet Exchange
• Demo at Interop 2014 by Internet Multifeed
Use case #3 SDN-IX DoS mitigation
AS1
IX
AS2OF
SW
Configure the blocking
policy via web portal
Ryu
OF controller

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Linux kernel
• OpenFlow
• New specification (1.5 for now)
• Software for Whitebox switch
• APIs for silicon in Linux
• Protocol stack (mainly BGP)
• Whatever necessary
Future Plans
HW
Kernel driver
SDK
OF
Agent
Use
Netlink, etc
Use
OpenFlow
Use
Vendor
Silicon
SDK API
Whitebox swtich API example

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• Use case: high performance
• IX route server
• Multi threads
• Thread to send keepalive messages per peer
• Thread for routing per rib
• Thread for reading bgp messages from socket per peer
• Modern management interface
• JSON REST API
• CLI is implemented in Python by wrapping REST API
(easy modify for your preferable output format)
New Ryu BGP speaker implementation
Parsing 70K BGP updates; each includes 8 routes
Old: 5.584 secs v.s. New: 0.205 secs
https://github.com/osrg/gobgp

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Thanks!
Questions?

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• What’s OpenStack?
• OSS for building IaaS
• You can run lots of VMs
• Many SDN solutions are supported
• How Ryu is used?
• Tenant network separation (virtual L2 network on the
top of L3 network)
• BGP support (chosen as the default BGP
implementation)
Use case #4 OpenStack integration