Nx o sv and virl

Accelerating Nexus feature
adoption with NX-OSv & VIRL
Huyến Dương huyeduon@cisco.com
Systems Engineer
CCIE #38257, VCP510
May 2014

2© 2014 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
q  Introduction to NX-OSv (Nexus OS virtual)
•  NX-OSv - a powerful tool
•  Different ways of exploring NX-OSv
q  VIRL (Virtual Internet Routing Lab)
•  VIRL System Architecture
•  Creating Network Topologies using VIRL
•  Available locations for VIRL, dCloud etc.
•  Licensing (internal & customers)
q  Simulating Real World Use Cases & Success Stories
•  L3, L2
Agenda

NX-OSv

•  Configuration Validation, testing and prototyping
new features
•  Troubleshooting complex networking problems
•  Training and familiarity of NX-OS Operating
system without spending $$
•  Customer Demos/Training – Capex intensive
Data Center Deployment Challenges

•  Easily evaluate new features before it hits production –
self, customer & partner education
•  Create highly accurate models – simulate real world &
future networks
•  Ability to easily spawn switches on a convenient
orchestration tool – flexibility & agility
•  Ability to scale multiple nodes within seconds – zero or
lower capex
Solution: Cloud-ify NX-OS

•  NX-OSv stands for Nexus OS virtual
•  NS-OSv is a software simulating Nexus switches running as
a VM
•  NX-OSv is NOT an emulator because the software data
plane does not emulate the Nexus hardware
•  It doesn’t simulate differences between N6K, N5k, N7k, N3k & N9k.
It’s a reference platform for NX-OS
Introducing NX-OSv

NX-OSv – Benefits – Why NX-OSv ?
•  Conveniently build, test and deploy networks
•  Rapid prototyping of new deployments
•  Validate/verify network designs and configurations
•  Reduction in expenditure on lab equipment
•  Decrease time for deployment of new services
•  Availability and ease of scaling resources
•  Reducing risks due to configuration errors

NX-OSv - Endless Possibilities!
Configuration
& Validation
Hands on
Learning
Network
Simulation
Programmatic
API
NX-OSv

NX-OSv – Data Center Fabric Simulation

Survey Response – NX-OSv Usability
NX-OSv Usability
Time Spent in
Exploring NX-OSv
Configuration
or CLI check,
55%
Programmatic
API, 10%
Hands on
learning, 12%
Network
Simulation
and
Prototyping,
23%

Survey Response – Preferred NX-OSv
Orchestration Tool

NX-OSv – Easy to Use
a) Integrated with VIRL (Virtual Internet Routing Lab)
http://virl.cisco.com/

NX-OSv – Easy to Use
b) Running as a Virtual Machine

Features Verified on NX-OSv
q Layer-3 Routing Protocols:
o  BGP (MP-BGP)
o  EIGRP (IPv4 & IPv6)
o  ISIS
o  OSPF and OSPFv3
o  RIPv2
o  Static Routing (IPv4 & IPv6)
q Management/Security Protocols:
o  AAA (LDAP, RADIUS, TACACS+)
o  CDP and LLDP
o  NTP
o  SNMP
o  Syslog
q Multicast Routing Protocols:
o  IGMP / MLD
o  MSDP
o  PIM / PIM6
q First Hop Redundancy Protocols
o  GLBP
o  HSRP (IPv4 & IPv6)
o  VRRP
q Pre-Release Features may be available:
o  AMT
o  LISP
q Programming
o  Python
o  NXAPI
Disclaimer: Some features such as NAC, Netflow and Policy Based
Routing (PBR) are configurable, but may not work. This may be
useful for CLI verification.

Unsupported Features on NX-OSv
q Bi-Directional Forwarding (BFD)
q Cisco TrustSec (Encryption)
q HA – ISSU Software Upgrades
q Layer-2 Switching (OTV is an exception)
q Hardware (TCAM) Related Features:
q Access Control Lists (ACL’s)
q Control Plane Policing (CoPP)
q Quality of Service (QoS)
q Interface Counters
q Port-Channel Interfaces (including vPC)
q Port Security
q Uni-Directional Link Detection (UDLD)
q Virtual Device Context (VDC)
q Q-in-Q Tunneling
q 802.1x (dot.1x)

VIRL (Virtual Internet
Routing Lab)
- the missing link for test driven development

What is VIRL?
A network orchestration and virtualization platform that
enables:
• Point-and-click network design
• Painless configuration
• Integration of platform-sync’d code
• Rapid setup and tear-down
• Seamless connectivity with ‘real’ networks
• Portability and repeatability

IOS XR NX-OS IOS XE IOS
Virtualized
in
IOS XRv
Virtualized
in NX-OSv
Virtualized in
CSR1000v
Virtualized
in IOSv
Servers
Ubuntu, Cirros,
3rd party
appliances
Virtual Machines run the operating system but are NOT representations of a
particular hardware platform – no fans, no switch fabric, no ASIC models
VIRL Architecture - Virtualized Platform Operating Systems

IOS XR NX-OS IOS XE IOS
Virtualized
in
IOS XRv
Virtualized
in NX-OSv
Virtualized in
CSR1000v
Virtualized
in IOSv
Servers
Ubuntu, Cirros,
3rd party
appliances
•  Same Control-plane code
•  Same Management plane code
•  Same memory footprint
•  Different CPU performance
•  Different Forwarding plane code
•  No ASIC emulation
VIRL Architecture - Virtualized Platform Operating Systems

Virtualization (nested?)
•  Virtualized devices (CPU, I/O,
memory) enable a single host to
support many virtual machines
•  KVM / QEMU provides a kernel-
based Hypervisor / host-
virtualization facility
•  Ubuntu provides the basic host
operating system
•  Intel VT-x / AMD-V capable
CPUs expose hardware-
virtualization functions to
Ubuntu / KVM
Physical Host
Host OS
Virtual Machines
Hypervisor
QEMU/

Keystone (Identity Services)
Glance (Image / Repository Services)
Nova
(Compute Services)
Neutron
(Networking Services)
Swift
(Object
Services)
Cinder
(Block
Storage
Services)
Horizon(Dashboard)
APIs/CLI
IaaS / cloud orchestration software – creates, manages, and deletes virtual
resources according to API- or CLI-based instructions
Built on OpenStack

VM Maestro
•  The graphical topology
editing tool
•  Enables rapid definition of network
elements:
ü  Routers
ü  Links
ü  Protocols
ü  Facilities
•  Supports complex topologies
•  Manages simulations

VM Maestro
editing tool
elements:
ü  Routers
ü  Links
ü  Protocols
ü  Facilities

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<topology xmlns="http://www.cisco.com/VIRL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
simulationEngine="OPENSTACK" schemaVersion="0.6" xsi:schemaLocation="http://www.cisco.com/VIRL
http://cide.cisco.com/vmmaestro/schema/VIRL.xsd">
<extensions>
<entry type="String" key="management_network">flat</entry>
<entry type="Boolean" key="AutoNetkit.enable_cdp">true</entry>
<entry type="Boolean" key="AutoNetkit.enable_OnePK">true</entry>
<entry type="String" key="AutoNetkit.address_family">dual_stack</entry>
<entry type="String" key="AutoNetkit.ipv4_infra_subnet">10.0.0.0</entry>
<entry type="String" key="AutoNetkit.ipv4_infra_prefix">8</entry>
<entry type="String" key="AutoNetkit.ipv4_loopback_subnet">192.168.0.0</entry>
<entry type="String" key="AutoNetkit.ipv4_loopback_prefix">22</entry>
<entry type="String" key="AutoNetkit.ipv4_vrf_loopback_subnet">172.16.0.0</entry>
<entry type="String" key="AutoNetkit.ipv4_vrf_loopback_prefix">24</entry>
<entry type="Boolean" key="AutoNetkit.enable_routing">true</entry>
<entry type="String" key="AutoNetkit.IGP">isis</entry>
</extensions>
<node location="518,292" subtype="IOSv" type="SIMPLE" name="Core">
<interface name="GigabitEthernet0/1" id="0"/>
</node>
<node location="519,172" subtype="IOSv" type="SIMPLE" name="A1">
</node>
</node>
</node>
Topology Representations
•  Topologies are represented in XML
•  Files are highly portable and shareable
•  Integrated support for GIT repositories enables
multi-user sharing, versioning

AutoNetKit
Network
Information DB
XML Topology Definition
Configurations
Topology Renderings
AutoNetKit Auto-Configuration
AutoNetKit:
•  Understands OS-specific configuration constructs
•  Presents graphical representations of topology attributes
•  Converts configurations between different OS-types and platforms

Create Routers
• Identify Type / Flavor
• Associate Image (Glance)
• Identify / Assign Resources
• Associate Configuration
• Launch the VM (Nova)
Create Networks / Links
• Identify Links and End-Points
• Assign End-Points to VMs
• Assign Network / Link
Characteristics
• Launch the Switch (Neutron)
XML Topology
Definition
The Services Topology Director orchestrates the creation of VIRL virtual routers and inter-router links
based on the XML-based topology definition and configurations based by VM Maestro
Services Topology Director

VM Maestro
Services
Topology
Director
Topology Graph with
Router Configurations
1
2
Router Configurations
3
Topology Views
4
5 6
Virtual Machines / Switches
7
8
A1-Console: 17000
A1-Aux: 17001
…
VIRL Workflow

VIRL Family
Cisco Modeling Labs
For Corporate users;
multi-user network
modeling, inc. TAC
support
Developers
Individuals
VIRL Personal Edition
For Individual users,
developers, students
etc.
Multi-purpose platform to
innovate for SDN / NFV /
Cloud paradigms.
/dev/innovate

VIRL Family
VIRL Personal
•  Personal Use
•  15 Cisco nodes (fixed)
•  Active call home (7 days off-net)
•  NO TAC support
•  VM images included
•  IOSv
•  IOS XRv
•  CSR1000v
•  NXOSv
•  More to follow
Cisco Modeling Labs
•  Multi User
•  Scale from 15 … X Nodes
•  No active call home
•  TAC support
•  VM images included
•  IOSv
•  Linux Server
•  Other VM images can be added

• NX-OSv: All features and upgrades –
Completely FREE of charge!
• VIRL Personal is $200/year
Licensing for NX-OSv

Creating Topologies using
VIRL
- Simulating Real World Use Cases & Success Stories

1.  L2 – Fabric Path
2.  NX-OSv Layer 3 Topology
Simulating Real World Use Cases & Success
Stories

VM Maestro
editing tool
elements:
ü  Routers
ü  Links
ü  Protocols
ü  Facilities

Use Case #1 – Fabric Path

Fabric Path – Simulating Leaf & Spine Nodes

Use Case #2 – NX-OSv
Layer 3 Topology

Scaling Physical Topology with NX-OSv
Nodes

DCI using BGP, MPLS
DC-1
DC-2
DCI

•  DevNet sessions -
https://app.smartsheet.com/b/form?EQBCT=cb025e00120b45899fa75b85eca2c0a7
•  DevNet learning labs - http://bit.ly/1DeoPsl
•  http://wwwin-drrc.cisco.com/virl/download/ [Cisco Internal]
•  http://virl.cisco.com/
•  https://github.com/datacenter/nexus7000
•  https://github.com/VIRL-Open/sample-topologies
•  https://dcloud-sng-web-1.cisco.com/dCloud/
References

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