CCNP RS – a road traveled

A former colleague who started following the blog asked about the study program used for the CCNP R/S. By the time an email … [Read more...]

RFCs You Should Know: 5218

rfc5218-fig

Quite often RFCs in the "earlier days" discussed not only process but also design. Looking back now, considering the … [Read more...]

Smarter Hosts Would Make A Simpler Network

Diagram 1

(or Magical Things I Would Do if Hosts Weren't Stupid) Introduction I'm a firm believer that many of the apparent problems … [Read more...]

Getting Ansible to talk to your Cisco devices

Ansible raw module

As a listener to the podcast you've probably heard about Ansible once or twice already. In short Ansible is a simple IT … [Read more...]

HTIRW: Reality at the Mic (2)

Last time we talked about a few things that go wrong in the IETF — this time we'll talk about a few more things that can go … [Read more...]

Troubleshooting Networks: Tips from a Network Detective

helpful_tips_74943355

For over 30 years I've been in the playing in the "world of IT" and wow has that world changed a great deal in those years. … [Read more...]

CCIE RS study planning, books, notes

Books, workbooks, videos, software, rack rental tokens, laptop hardware and software have all been purchased; it's time to … [Read more...]

ISIS Link-Group

ISIS Link-Group

Introduction On the Core or Edge network, we need more and more bandwidth. For a large service provider, in some parts of … [Read more...]

CCIE sponsorship proposal example

CCIE Route-Switch sample budget

Departing the lovely, sterile, electronic testing center after passing the final CCNP Route/Switch exam, and I'm on the way … [Read more...]

OpenStack Neutron – The Dirty Network Detail

OpenStack Neutron Networking

Update: I'm slowly getting there, third and more accurate diagram attached below which now includes where security policies, … [Read more...]

Cisco NAT Cheat Sheet

Cisco_NAT_Cheat_Sheet

I've always had a difficult time when attempting to remember how to implement the different types of NAT available on ASA and … [Read more...]

Listen to Packet Pushers? Take Our 2015 Audience Survey!

crowd

Packet Pushers wants to know about you. Now, we don't want to know about you specifically, because that would be creepy. … [Read more...]

BGP RR Design – Part 2

BGP RR Fig.10

This is a continuation from Part 1 9. ACME VPN RR's Design: So the current total number of PE's dedicated for VPN … [Read more...]

BGP RR Design – Part 1

BGP RR Fig.12

1. Introduction In this post we will be looking at large scale RR design by using a fictional ISP ACME  as a reference. As … [Read more...]

HTIRW: Reality at the Mic (1)

We've talked a little about the structure of the IETF, and the process a draft follows when moving from submission to draft … [Read more...]