It's Never The Network

Locator/ID Separation Protocol - LISP

By Brandon James on 2019-09-04 Filed Under: Route/Switch
The Locator/ID Separation Protocol or LISP was originally designed to decrease the size of routing tables on the Internet. As the protocol matured it made it's way into the enterprise[^1] though solutions like Cisco Software Defined Access. In this article I provide a summary of the problem LISP solves and how LISP functions. The purpose of this article isn't to cover the protocol in it's entirety, but to build an awareness of how the protocol works.

Bitwise Operations and Subnetting

By Brandon James on 2019-07-29 Filed Under: Route/Switch, Programming
I wrote a simple subnet calculator in C. Here are my takeaways from the process and some information on how it works.

Don't use FHRPs without Authentication

By Brandon James on 2019-02-17 Filed Under: Route/Switch, Security
FHRPs have obvious benefits, but a misconfiguration could allow an attacker to MiTM your traffic.

Conf T via SNMP

By Brandon James on 2017-01-26 Filed Under: Route/Switch
On occasion there might be reasons to make configuration changes via SNMP. Here's how