Packets DownRange
Border Gateway Protocol (BGP) is the Internet’s dominant inter-domain routing protocol, and as such, it is a critical component of the Internet’s infrastructure. However, BGP, like any other technology, has flaws. The following are some of the most common BGP issues: Some of the above issues are being addressed with RPKI, Routing Registries, and MANRS, … Read more
One of the most incredible things this week is the updates to the cloud flare speed test. Lots of things were analyzed, with a lot of questions on why. I will have a blog post separately about this. Sponsor ISP News•WANRACK to acquire KwikCom. WANRack, LLC (“WANRack”), a national leader of custom fiber optic network … Read more
Ever wonder why BGP seems to be such a complicated protocol to administer? It seems pretty straightforward to set up. Some commands, and you have a BGP session. Easy huh? BGP is one of those things where the more BGP feeds you bring in, the more complex traffic management becomes. Why? Take a look at … Read more
From now until the end of the year, I am running the following consulting package, including the following ARIN services. -Helping you set up your organization within ARIN-Helping you set up your Point of Contact (POC) records-Getting your own ASN-Getting an IPV6 allocation-Generating RPKI and ROA for up to 10 IP blocks (V4 and V6)-Creating … Read more
This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more
APNIC has a bog article on detecting “bgp lies”. https://blog.apnic.net/2021/05/24/a-tool-to-detect-bgp-lies/Do you ever wonder whether you can really trust other networks, such as your provider(s) and peers? More precisely, wouldn’t you like to be able to tell if the traffic you send always flows through the paths received in the Border Gateway Protocol (BGP)? Could it be that, … Read more
This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this content, you must be a member of Justin’s Patreon Unlock with PatreonAlready a qualifying Patreon … Read more
I am starting to see the following scenario more and more as IPv4 space is hard to get, but isn’t. With ARIN it is still possible to get an IPv4 allotment. Many smaller ISPs qualify for a /24 and can get one if they wait long enough on the ARIN waiting list. a /24 of … Read more
There always is a lot of talk about Mikrotik RouterOS CPU usage. I wanted to take a few minutes and go over a real-world example and explain some of the ins and outs when discussing Mikrotik CPU usage. Let’s talk about the router in question. This is a CCR1016-12s-1S+. This is a 16 core 1.2GHz … Read more
The following is from http://routing.he.net/algorithm.html . This outlines the criteria HE.NET uses for filtering routes from peers and customers. This is the route filtering algorithm for customers and peers that have explicit filtering: 1. Attempt to find an as-set to use for this network.1.1 Inspect the aut-num for this ASN to see if we can … Read more
https://radar.qrator.net/blog/as10990-routing-optimization-taleConclusion? Do not try to optimize the routes with automated software – BGP is a distance-vector routing protocol that has proved, throughout the years, its ability to handle the traffic. Software, wanting to “optimize” the system involving thousands of members would never be smart enough to compute all the possible outcomes of such manipulation.
Recently, there was a thread on the NANOG list asking what were somne favorite network troubleshooting tools. I have taken many of these tools and created the following list. http://ping.pe/Simple pingport and dig commands https://mtr.sh/BGP Looking glass https://perfops.net/mtr-from-worldTraceroute from various hosts on the net http://www.traceroute6.net/IPV6 tools (ping,traceroute,etc) https://dnsviz.net/Carious DNS tools http://irrexplorer.nlnog.net/Routing Registry object explorer https://mxtoolbox.com/DNS … Read more