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Running VM with specific time on KVM

Pada post kali ini saya akan membahas bagaimana cara untuk Running VM dengan Jam dan tanggal yang sudah ditentukan. Cara ini biasa digunakan untuk mengelabuhi license yang sudah expired, hehe. Sebenarnya pada KVM tidak ada opsi untuk merubah Jam dan tanggal secara spesifik, oleh karena itu kita harus memasukan command Option QEMU pada file XML KVM.

note : QEMU memiliki opsi untuk merubah Jam dan tanggal secara spesifik.

Saya asumsikan anda sudah menginstall KVM dan sudah mempunyai satu VM yang running (saya gunakan CentOS).

Langkah-langkah yang dapat dilakukan adalah sebagai berikut :

  1. Verifikasi jam dan tanggal pada VM sebelum melakukan perubahan.

  2. Edit VM  XML file dan tambahkan beberapa command berikut pada awal dan akhir domain.

  3. Restart VM
  4. Verifikasi jam dan tanggal pada VM setelah melakukan perubahan.

 

Ketika kita Merestart VM, maka jam dan tanggal akan kembali mereset kembali sesuai dengan konfigurasi yang sudah ditentukan.

 

Network Telco Engineer – SDN/NFV Enthusiast

Deploy Nokia vSR/vSIM in Distributed Mode on GNS3

In this post I will explain how to deploy Nokia vSIM/vSR in distributed mode, in the previous post I have explained how to deploy vSIM/vSR in integrated mode “Getting Started Nokia vSR on GNS3“.

As we know the vSIM can be deployed in two mode : integrated or distributed.

Integrated Model

The Integrated model allow us to emulate physical router using a single VM. All function like control, management and data plane are performed by the resources of the single VM.

An integrated vSIM can just deployed in chassis type SR-c4 or SR-c12.

Distributed Model

The distributed model uses two or more VM that connected to internal network to emulate physical router.

In a distributed system, each VM is specialized, supporting either control plane (CPM) or dataplane functions (IOM or XCM). A distributed vSIM support one CPM or redundant CPMs in the same active-standby model as the emulated physical router.

A distributed vSIM can be deployed in anything chassis type except SR-c4 or SR-c12

In this post I will try to emulate physical Nokia router chassis 7750-SR7 with single CPM5 and IOM3-XP with MDA m10-1gb-sfp-b and isa-tunnel. Read More

Network Telco Engineer – SDN/NFV Enthusiast

BGP Configuration in Nokia, Cisco, Juniper and Huawei Part 1

BGP is a routing protocol used to exchange routing information between different autonomous systems (Ases) and is described in RFC 4271, A BGP 4. An IGP such as OSPF or IS-IS have a main role for exchange of routing information within each AS. BGP is very scalable and stable routing, therefore bgp in most cases is deployed to improve/enhanced the existing network.

BGP can scale to million of routes and multiple copies of the Internet route table. Therefore, BGP is the fundamental routing protocol of the internet and is used  by every ISP in the world for ISP interoperability. Right now BGP still growth to support various capabilities such as multiple protocol families. Read More

Network Telco Engineer – SDN/NFV Enthusiast

Getting started with Vagrant

Hello, i come back to write again, now i will to explain how to starting vagrant for the first time, well actually i’m not familiar with vagrant also, I curious about this when i want to emulate VXLAN tunneling between the Virtual Machine. I found some article that explained how easy to provisioning VM and apps with vagrant.

Vagrant is an open source software product for building and maintaining portable virtual machine development environment. the core idea behind its creation lies in the fact that the environment maintenance becomes increasingly difficult in a large project with multiple technical stack. Vagrant manages all the necessary configuration for developers in order to avoid unnecessery mintenance and setup timeVagrant is written in Ruby Language. Read More

Network Telco Engineer – SDN/NFV Enthusiast

Getting Started Nokia vSR on GNS3

Let’s we start how to emulate SROS router with Nokia vSR (virtual service router), like other network peripheral company, Nokia have vSR to support future network called Network function virtualization (NFV) that represents a new trend in networking where network functions that previously depended on custom hardware can now be deployed on commodity hardware using standard IT virtualization technologies for added flexibility.

Nokia Virtualized Service Router have following 2 NFV product :

  • Virtualized Service Router – Simulator (VSR-SIM)
  • Virtualized Service Router – Route Reflector (VSR-RR)

The VSR-SIM simulates the control, management, and forwarding functions of a 7750 SR or 7950 XRS router. The VSR-SIM runs the same service router operating system (SR OS) that runs on the 7750 SR and 7950 XRS hardware-based routers and has the same feature set and operation behaviour as those platform. Configuration of interface, network protocols, and services is done the same way as it is on a physical 7750 SR and 7950 XRS system. Read More

Network Telco Engineer – SDN/NFV Enthusiast

MPLS Concepts and Components

Sebuah router yang mengaktifkan fitur Multiprotocol Label Switching (MPLS) akan memforwad traffic berdasarkan label yang disisipkan pada header packet. Kenapa disebut multiprotocol karena MPLS dapat digunakan untuk memforward berbagai macam tipe paket melalui semua Network protocol layer 2 menggunakan teknik sederhana switching. Secara sederhana topologi service provider  yang enable MPLS terdiri dari CE (Customer Edge) router, PE (Provider Edge) router dan P (Provider Core)  router. Read More

Network Telco Engineer – SDN/NFV Enthusiast

IPv6 (Internet Protocol version 6)

IPv6 dikembangkan pada tahun 1990-an (RFC 2460) yang bertujuan untuk menggantikan IPv4 dengan alasan utama, kapasitas address IPv4 yang sudah mulai habis. IPv6 terdiri dari 128-bit dan dapat menampung total alamat 3.4 × 1038 , sangat jauh berbeda dengan IPv4 yang hanya terdiri dari 32-bit dan hanya dapat menyediakan alamat IP sekitar 4 miliar. Dengan alokasi IP yang sangat besar, dapat dipastikan tidak ada limitasi/pembatasan alamat IP, dengan keadaan seperti ini fleksibilitas dapat dicapai oleh setiap host, terutama perangkat mobile.

IPv6 di definisikan menjadi 3 tipe yang berbeda :

  • Unicast       : Unicast address digunakan untuk single host
  • Multicast    : Multicast address digunakan untuk grup hosts
  • Anycast       : Anycast address digunakan lebih dari satu host, misal ada paket yang ditujukan untuk alamat unicast, maka paket tersebut akan diterima oleh host terdekat ditentukan berdasarkan routing protocol.

Perlu diketahui bahwa IPv6 tidak menyediakan alamat broadcast, muncul pertanyaan”Lalu bagaimana nasib protokol yang memanfaatkan sistem pengalamatan broadcast seperti ARP ?” Read More

Network Telco Engineer – SDN/NFV Enthusiast