Packets DownRange
Internet Service provider topics, Network operations, and other topics. Some topics include Mikrotik, Cisco, Arista and other configurations.
Why Clean Fiber Optic Cable Ends? Fiber optic networks are designed for high-performance data transmission with minimal interference or loss. However, contaminants on the cable ends can significantly degrade the quality of these transmissions. Below are some key reasons why cleaning fiber optic connectors is essential: 1. Maintaining Signal Integrity At the core of fiber … Read more
Open Shortest Path First (OSPF) is one of the most widely used link-state routing protocols in large enterprise networks, known for its scalability and efficiency in handling complex topologies. One of the key features that makes OSPF flexible is its support for different types of areas. OSPF areas are used to logically group routers, reducing … Read more
Fiber splicing is joining two optical fibers to create a continuous, low-loss, and highly efficient optical path. This connection is essential to maintaining the integrity and reliability of optical communication networks, whether they are used for internet connectivity, telephony, or data transmission. Fiber splicing can be performed in two primary ways: fusion and mechanical splicing. … Read more
https://blog.apnic.net/2024/03/14/ipv6-dns-and-truncation-in-udp/ In February I looked at the behaviour of the DNS when processing responses in UDP, which set the truncated flag in the DNS response. In particular, I was looking for the incidence of DNS resolvers that used the answer section in truncated responses (despite the admonition in DNS standards not to do so) and the … Read more
With the release of Mikrotik Winbox version 4 we now have a Mac native application. This looks the same as the Windows and Linux versions. Way to go, Mikrotik! https://mikrotik.com/download
I recently installed LibreNMS for monitoring some LTE clients. These clients reboot every morning at 3am. This is important to know. When I added them, they all showed up in a warning state. Some google searches said this was due to the uptime default being 86,400 seconds. Libre has a FAQ that explains this as … Read more
/127’s for point-to-point links (RFC 6164) instead of /64’s https://datatracker.ietf.org/doc/html/rfc6164 [RFC4291] specifies that interface IDs for all unicast addresses, except those that start with the binary value 000, are required to be 64 bits long and to be constructed in Modified EUI-64 format. In addition, it defines the Subnet-Router anycast address, which is intended to … Read more
I originally published this article in 2015. For years I have hung out with “Hams” and been interested in the technology. Guys like ka8jil, w9sn, w9smj, w9cjo, and w9abh have all interested me in ham radio. I remember many years ago, before cell signals were digital, I could pull up to a car and watch … Read more
I have wanted to write this article for a while. When the topic is fresh in my mind, I am usually too tired from a day of climbing. By the time things get around, the lessons learned have escaped me. So, after a day of being in the sun on a 150-foot monopole, I figured … Read more
Several of you have heard me discuss modular network design, which has five distinct advantages. 1. ScalableYou can upgrade pieces more easily than all-in-one devices. Upgrading a certain module for that big new client might mean the difference between being able to do it in 10 days instead of 30. 2. ResilientYou can avoid single … Read more
http://www.subnetonline.com/pages/ipv6-network-tools/online-ipv6-ping.phpIPV6 Ping tool http://www.subnetonline.com/pages/subnet-calculators/ipv6-subnet-calculator.phpIPV6 Subnet Calculator
