Welcome to Next Header

A networker's blog

Junos Fusion – Part I – Overview, Components, Ports and Software

This is the first part of the series about Junos Fusion and these are the topics: Overview Benefits Components Ports Software Overview Junos Fusion allows to significantly increase the number of interfaces on a device(called aggregation device, AD) by interconnecting the AD with satellite devices(SD). The resulting system(Junos Fusion) presents itself to the rest of… Keep reading »

Vagrant – Part III – Networking and Multimachine

This is the third part of the Vagrant series where I will cover some of the networking and multimachine features options. The first part and the second part provide some background information. Networking options cover port forwarding, connection to public network and private network. Private network allows you to access the VM using an IPv(4|6)… Keep reading »

Channelizing interfaces on QFX5200

The 32 ports on Juniper QFX5200 can operate as 100G or 40G, based on the optic inserted in the port. The 100G ports can work as 100G or they can be channelized to 50G or 25G. The 40G ports can work as 40G or they can be channelized to 10G. The 100G/40G appeat as et-fpc/pic/port… Keep reading »

Vagrant – Part II – Synced Folders, Provisioning

In this second part of the series covering, I will cover synced folders and provisioning and other small features like VirtualBox Guest plugin installation and box update. In the first part, we saw how to initialize Vagrant, how to spin a VM, how to connect to it and how to shut it down/reload/destroy. In case… Keep reading »

Vagrant – Basics

This post will be the first one from a series covering Vagrant. I recently started to play with it and thought it would be great to document what I learned so that others can benefit from my notes. Vagrant is a tool for building and managing virtual machine environments. Vagrant provides easy to configure, reproducible,… Keep reading »

Statistics for logical child links in aggregated interface on QFX10K

On QFX10k, by default you cannot see the statistics for the logical child links of an aggregated interface. Based on the family configured(ethernet-switching, inet and so on), you might see some of them(on only some of the child links, on only one direction or some other times, duplicated stats). To solve the problem, you need… Keep reading »