Embed Size (px)
Citation preview
About Me
Hwchiu （邱渣）在 synology 當小小研替NSL @ NCTU
主要研究OpenvSwitch
Floodlight
Mininet
Floodlight Contributor
Architecture
Third-module
Outline
SDN againIntroduction to MininetMininet basic operationCustom Topology
SDN Brief
SDN Brief
SDN Brief
SDN Brief
SDN Advantage Example
Mininet Introduction
What
Why
Where
How
What
Mininet is a network emulator
Mininet creates a realistic virtual network, running real kernel, switch and application code, on a single machine (VM, cloud or native) - mininet.org
What (Cond’t)
Switch
Switch
Switch
Switch
Switch
Switch
Switch
Switch
Switch Switch
What (Cond’t)
What (Cond’t)
Switch
Switch
Switch
Switch
Switch
Switch
Switch
Switch
Switch Switch
Why
DeveloperTesting Controller
Testing Network Application
Testing before deploy
Compare to the real environmentFlexible
Scalable
Low Cost
Prove of Concept
Where
Official Page http://mininet.org
Githubhttps://github.com/mininet/mininet
How
Linux Server
Host
Switch
Host
How (Cont’d)
Linux Network Namespace
A network namespace is logically another copy of the network stack, with its own routes, firewall rules and network devices.
Network isolation.
How (Cont’d) - NS
Linux Server
ns-host1 ns-host2
ns-switch
How (Cont’d) - NIC
Linux Server
ns-host1 ns-host2
ns-switch
eth0 eth0
eth0 eth1
How (Cont’d) - veth
Linux Server
ns-host1 ns-host2
ns-switch
eth0 eth0
eth0 eth1
Mininet Basic Operation
OperationController
Topology
Information
MethodCommand Line
Python Script
Operation
Start upsudo mn
Clean upSudo mn -c
Controller
Connect to the controllermn --controller=<type>,,ip=<ip>,port=<port>
Type: osvc, default, remote ...etc
mn --controller=remote, ip=127.0.0.1,port=6653
Topology
Default TopologyOne switch + two hosts.
sudo mn
Host
Switch
Host
Topology (Cont’d)
mininet> net
mininet> nodes
Topology (Cont’d)
mininet> dumps
Topology (Cont’d)
Default topologysingle
One switch + <number> hosts.
mn --topo=single,5
Host
Switch
HostHost HostHost
Topology (Cont’d)
Default topologylinear
n * (switch + host)
mn --topo=linear,2
Host
Switch
Host Host
SwitchSwitch
Topology (Cont’d)
Default topologytree
Binary Tree.
mn --topo=tree,2
Host
Switch
Host HostHost
Switch
Switch
Node command
<node> <command>Mininet > h1 ifconfig
Mininet > s0 ifconfig
Mininet > h1 ps
Mininet > h1 ping h2
Mininet > h1 iperf -s &
Custom Topology
Write the custom mininet script (custom.py)
sudo python custom.py
ExampleLeaf-spine.py
Tutorial
https://github.com/mininet/mininet/wiki/Introduction-to-Mininet
Custom Topology
Get Mininet Instancenet = Mininet()
Add switchname=”s0”
sw = net.addSwitch(name)
Add hostname=”h0”
host = net.addHost(name)
Add Linknet.addLink(sw, host) <<<< instance of switch/host
Q&A
