Packets DownRange
Internet Service provider topics, Network operations, and other topics. Some topics include Mikrotik, Cisco, Arista and other configurations.
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.This content is available exclusively to members of Justin’s Patreon at “Any patron” or higher tier, or having … Read more
This came across the NANOG mail list. A Longitudinal View of Netflix: Content Delivery over IPv6 and Content Cache Deployments paper: https://bit.ly/2toOGWPslides: https://bit.ly/2ZoEpapvideo: https://vimeo.com/437111302 Some highlights Caches reachable within 6 IP hops and 20 ms-IP path lengths shorter by 40–50%-Latency lower by 64%-Throughput higher by factor of three-Latency benefits more pronounced over IPv4 compared with … Read more
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
Let’s face it, if you are an owner, sysadmin, network admin, or whatever in a small to medium Internet Service Provider vacations can be a troublesome thing to accomplish. Getting away for a conference or training can be a huge deal as well. In this post, I want to help you layout some steps to … Read more
Many Wireless Internet Service Providers (WISPs), especially newer startups, struggle with nat issues and having enough public Ip addresses to go around. Invariably, you start running into double nat issues pretty quickly. Then you get the dreaded gamer call: Many times they don’t know why they are even calling. They just know the magic box … Read more
What is a routing registry?From Wikipedia https://en.wikipedia.org/wiki/Internet_Routing_RegistryThe Internet routing registry works by providing an interlinked hierarchy of objects designed to facilitate the organization of IP routing between organizations, and also to provide data in an appropriate format for automatic programming of routers. Network engineers from participating organizations are authorized to modify the Routing Policy Specification Language (RPSL) … Read more
Internet Service Providers (ISPs) can be intimidated by all of the facets of working with the American Registry of Internet Numbers (ARIN). I have put together a guide that outlines common things you, as a service provider, need to do. This guide is not an end-all how-to. Throughout, I am posting videos and links taken … Read more
If you are a Hurricane Electric customer you may be receiving e-mails like the following: What does this mean for you as a service provider? If you use Hurricane Electric as transit or peer with them on an exchange you will need to have ROAs for your blocksand have routing registry objects. I did a … 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 at $4 or more Unlock with … Read more
This morning I had a Mikrotik CCR1016 where I had to change the router ID, which caused all the sessions to reset. The following is a screenshot of the time it took to re-learn all of the peers. Obviously, the smaller prefixes were learned pretty quickly. It took about 10 minutes to learn two full … Read more
Tutorial on Using The Rooter project to establish an OpenVPN connection to a Mikrotik router.
When you are scheduling late maintenance schedule it anytime after 12:01AM so there is no confusion on the day. It’s easier to clarify 12:01AM on Friday the 10th than midnight on Friday. Folks tend to get confused when you say midnight. Is that midnight Friday into Saturday or Midnight Thursday into Friday? If you want … Read more