Simulasi Network OSPF di Cisco, Mikrotik dan Juniper

Pembahasan berikutnya tentang simulasi OSPF. Ada 3 jenis perangkat yang digunakan, yaitu Cisco, Mikrotik dan Juniper Junos. Tujuan simulasi ini :

• Melihat kinerja network yang diconnectkan dengan routing ospf.
• Belajar command Juniper Junos.

How to Fix Problems in Cacti

No graph display, SNMP agent is not installed
This has been discussed in previous posts, and see also how to install SNMP Agent in previous post, http://myconfigure.blogspot.com/2013/06/how-to-install-snmp-agent.html. 

Error    : Can't find file: 'poller_output'

Graph display does not appear, besides the lack of SNMP Agent, it could be due to a full hard drive. Check disk space by using the command

How to Install SNMP Agent

There are a lot of questions, "why Cacti that has been installed in my Windows, not working ?", why no graph display?. The reason is you do not have the SNMP agent in each device that you want to monitor. This is the explanation, it's not details but I hope it makes you understand.

CactiEZ, Cacti Make Easy

CactiEZ is a self installing Linux Distribution based off CentOS that sets up and configures a customized Cacti install. Everything is designed to be completely automated and working directly out of the box. This compact distro is loaded with extra features such as Syslog and Netflow data collection, Weathermaps, Reports, Auto Discovery, and much more!

Features

• Built on Centos 6 x64

The Easiest Way to Install Cacti on Windows

This is the easiest way to install cacti-0.8.8a in windows. Just install file cacti installer for Windows, then cacti and all the needed files will be installed automatically. Thank you who has made the cacti installer.

Below a complete description of the cacti installer. I quote from the cacti forum.

Description
I've put together an all-inclusive Windows installer for Cacti. It's been tested on Windows XP/2003/2008/Vista/7.

Monitoring Squid with Cacti (Template Cacti for Squid... Complete...!!!)

I assume that you have installed snmp, squid and cacti, before. I will not explain again about how to install squid, snmp, cacti, etc.. there's so many article to discuss about that’s.
Then, if all installation is complete, let's make graph template for squid.

1. cek your squid configuration,
# squid -v
Squid Cache: Version 3.1.22

Install Snmp & Cacti on Ubuntu 12.10

What is Cacti ??

Cacti is an open-source, web-based network monitoring and graphing tool designed as a front-end application for the open-source, industry-standard data logging tool RRDtool. Cacti allows a user to poll services at predetermined intervals and graph the resulting data. It is generally used to graph time-series data of metrics such as CPU load and network bandwidth utilization. A common usage is to monitor network traffic by polling a network switch or router interface via simple network management protocol (SNMP). (wikipedia)
Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database.

Membuat Template Multisensor di Cacti

Agar lebih menarik, beberapa sensors ditampilkan dalam 1 buah grafik saja di cacti. Bagaimana cara melakukannya ???
Postingan ini lanjutan dari postingan sebelumnya tentang "Membuat Grafik Sensors di Cacti" Jika kita memiliki beberapa buah sensors, misalkan disini ada 5 buah sensors voltage, kita bisa menjadikan kelima sensors menjadi 1 buah grafik. Default graph template sensors voltage di cacti adalah untuk 8 buah sensors (8 X). Bisa saja kita langsung memasukkan ke lima sensors pada template 8 X. Namun karena di template harus diisi semua 8 buah sensors, maka pasti nantinya akan ada yang double. Ndak keren donk kalo ada beberapa sensors yang double. Untuk itu kita harus menyesuaikan dengan merubah template sensors 8 X menjadi 5 X, sesuai dengan jumlah sensors yang kita miliki.

Membuat Grafik Sensors di Cacti

Sudah beberapa kali install cacti, tapi belum terarsipkan. Akhirnya ketika saya dimintain tolong sama tetangga untuk dibuatkan tampilan grafik, saya oke-oke saja, sekalian kesempatan mengingat-ingat dan mengarsipkan kembali... :)
Langsung saja. Kebetulan disini OS yang saya gunakan adalah OpenSuse 10.3.

1. Install sensors, beserta packet-packet pendukung lainnya. Lebih mudahnya gunakan yast.
Masuk ke yast --- software --- software management. Gunakan fasilitas search, untuk mencari packet sensors. Jangan lupa masukkan CD / DVD nya. Sangat mudah, karena itu, saya tidak akan menjelaskannya secara details.