The weird situation when you notice that IPv4 get a packet loss, while IPv6 works as expected for the same physical link:
Since the beginning of my contribution to FRRouting, I raised myself to the top 15 contributors (that’s a huge win for me personally):
This is the main reason I stopped (or less) blogging because I’m more interested in how the internet works and give my full fingers improving the internet overall.
Imagine your services critically depend on the Link Layer Discovery Protocol (LLDP). And this is the brownie if you have $VMWare ESXi and Intel 710/711722 series NICs.
I was asked from developers to tell about git how we use it in operations team (aka SRE/DevOps). In an ideal world, developers should teach operation guys how to use git at scale. But sometimes reality is far away.
Route leaks or even hijacks are one of the biggest flaws in global routing.
Using DNS-based load balancing doesn’t save you from the failure. DNS server doesn’t know if the backend is up or down. It just responds without carrying about the state of the backend.
In my previous lighting blog post, I described how it’s possible to null route the whole datacenter by having fat-finger syndrome.