Introducing the J2SW BGP Community Builder
The J2SW BGP Community Builder selects documented provider communities and generates scoped policy fragments for MikroTik, Cisco, Junos, and FRRouting.
mikrotik
Mikrotik Winbox 4.3 is out
What’s new in 4.3 (2026-Jul-20 10:14): *) app: add Windows for arm64 version in file WinBox_Windows_arm64.zip;*) form: make multiline input field height logic as in WinBox v3;*) table: add quick comment feature (allow multi-row commenting);*) table: allow opening “Table settings” also via right mouse click;*) table: calculate implicit height to fit 16 regular rows including … Read more
Introducing the J2sw MTU and Encapsulation Calculator
Ever wondered what the effects of different combinations of PPPoE, GRE, and others have on the MTU of a packet? I am excited to announce the first of many J2 Network tools: the J2SW MTU and Encapsulation Calculator. You select the service MTU and the encapsulation used on the path. The calculator then works out … Read more
Mikrotik quietly adds features to the Winbox package updates
Mikrotik has added some new features to system…packages as far as updating goes. More info to come soon.
The Top 6 Most Common MikroTik Configuration Errors Made by Network Administrators
Whether you’re a seasoned engineer or just getting started, this post will walk you through the six most common MikroTik configuration errors and how to avoid them.
BGP: What is the no_export Community?
In this post, I will dive into what the no_export attribute is, how it works, and when you should use it.
Mikrotik RouterOS V7 BGP Template $15
The following is a Template for creating a BGP session with both a v6 and a v4 peer in Mikrotik RouterOS v7. It costs $15 for Patreon subscribers or $20 for everyone else.
Using Point-to-Point OSPF and example configurations
In this post, I will break down what OSPF point-to-point mode is, when to use it, and why it might be your best option.
Vendor Quirks & Common Pitfalls in BGP Configuration
In this post, I walk through some key quirks and common pitfalls you might encounter when configuring BGP on MikroTik RouterOS (v6 & v7), Cisco IOS, Juniper Junos, and Arista EOS.
Why ISP-Specific Training is Critical to…well duh…ISPs. Part 1
ISP-specific training focuses on the unique challenges and technologies Internet Service Providers face. Unlike general networking or CompTIA-style certifications, this type of training zeroes in on real-world field scenarios
MikroTik vs Cisco: How BGP varies between platforms. The 10,000 foot view
MikroTik vs Cisco: How BGP Works on Each Platform When it comes to Border Gateway Protocol (BGP), both MikroTik and Cisco routers offer powerful capabilities to participate in dynamic interdomain routing. However, there are some significant differences in configuration syntax, defaults, feature sets, and operational behavior between the two platforms. Whether you’re migrating between them … Read more
Patreons: MikroTik v7 BGP Troubleshooting Commands
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 $1 or more Unlock with … Read more