4. Linux for Network Engineer

7/25/2019 4. Linux for Network Engineer

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Linux for Network En ineerEricson Ferdinand Pasaribu

Solutions Architect - NGN & Network Programmability

([email protected])


2/13

Network configuration works are done manually

No common open platform to manage network devices

Vendor specific CLI Hardware vendors decides the available network

management protocol


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Cloud computing's expansion Data center virtualization Network virtualization

SDN DevOps movement

White box switches

Network platform is becoming more open and programmable

Linuxbecomes relevant


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Great platform for software development Base of many network OS

o

Juniper JUNOS, Arista EOS, Mikrotik RouterOS, etc. Automation/orchestration platform on Linux systems

o OpenStack, OpenDayLight, etc.

Configuration deployment toolso Puppet, Chef, Ansible etc.

Its free

Better for NE long term careero Future of networking is about applications and software


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Networking toolso tcpdump, net-snmp, ssh/scp/sftp, etc.

Shell scripting

Cron Linux KVM

Open vSwitch etc.


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Linux Kernel-based Virtual Machine Kernel module, since release 2.6.20

Turns Linux kernel into hypervisor

o Intel VT-x, AMD-V


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KVM kernel module QEMU

libvirt

VM management tools

virsh virt-viewer virt-manager

libvirt

o virsh

o virt-viewer

o virt-manager

o etc.

Kernel KVM

module

Qemu

Guest

OS

Guest

OS


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Multilayer virtual switch Provides switching stack on virtualized environment

Full L2 to L4 matching capability OpenFlow protocol support In Linux kernel since release 3.3


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VM1 VM2

vNIC vNIC

OVS

Physical switch

vIF1 vIF2vIF3

pNIC

pNIC


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Create VMs using KVM hypervisor and interconnect them.

Host 1

VM1 VM2

Host 2

VM3

OVS1

vNIC vNIC

vIF1 vIF2vIF3

eth1 eth0

OVS2

vNIC

vIF1

vIF3

eth1

eth0

Data

network (L2)

Management

network (L2)


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Summary


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Quiz


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Documents

4. Linux for Network Engineer