Tag: ipv6

Having fun with unusual IPv4 formats

Did you know that “2130706433” is a valid IPv4 address, and pinging it from major OSes will yield a positive result? Let’s look into how it works.

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ECMP on Linux

During a new server deployment I’ve come across the need to use ECMP on Linux. Turns out it’s actually really simple to configure. Read more →

Bird Unreachable Routes on multihop BGP Sessions

In the past few months, quite a few people have asked me this question: “I bought a VPS from provider X, turned up a BGP session with them and my routes are all marked unreachable”. Today’s post will hopefully shed some light on what causes this phenomenon and how to deal with it.

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Configuring Tunnel Broker BGP on Mikrotik

Hurricane Electric’s free service Tunnel Broker allows one to set-up 6to4 tunnels in order to get IPv6 connectivity to IPv4-only sites. In addition to “regular” tunnels, where they assign you a random prefix from their ranges, they also support BGP┬átunnels. Today I will show you how to set one up and configure it on a Mikrotik device.

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