BGP.guru

BGP.guru

A Nerd blog.

30 Apr 2015

Latency and Effects on TCP Performance

Have you ever used a download manager to download multiple threads, in order to max out or more fully utilize your connection? This is the effect of a small TCP receive window. How does latency factor into this?
12 Apr 2015

virtio NIC on OpenBSD under KVM

I've been running ciscodude.net at a new location for about a month now. My setup is a little different than it was previously. Instead of a 2nd physical server in front of my VM host as firewall/ACLs, I've now got a virtual machine doing the same thing. The setup is the same other than that, OpenBSD firewall in front of Linux service VMs.
22 Mar 2015

Using ULA and NAT66

What are IPv6 Unique Local Addresses (ULA)? Why would you ever want to use NAT with IPv6? These two questions are directly related. If you were running services with ULAs, you would want to translate those addresses into public addresses. This is where NAT66 comes in.
08 Mar 2015

ASN Growth in Manitoba

I recently started maintaining this graph which shows the total number of AS Numbers in Manitoba. You will notice the dramatic increase in 2013 and 2014.
10 Feb 2015

Sleep Talking

This is a write up of an issue which I experienced on one of my networks. It is in response to When Good NICs Do Bad Things: A Blast of IPv6 Multicast Listener Discovery Queries posted on packetpushers.net.