Understanding Shortest Path First
Link state protocols like OSPF and IS-IS use the Shortest Path First (SPF) algorithm developed by Edsger Dijkstra. Edsger was […]
Routing
Routing
Routing
IS-IS Behavior on Multi-Access Networks
In many ways, IS-IS is a simpler, and perhaps more elegant, routing protocol than OSPF. However, it often gets misunderstood.
Routing
Route Replication the Easy Way
Easy Virtual Network (EVN) was a technology Cisco came up with back in the days to make it easier to
Routing
General – Advice on Numbering Policies in Networking
There are several situations where we need to write some form of policy such as QoS, routing policies used in
Network Design, Routing
General – Challenges in Load Balancing Traffic
For the last year I have been working a lot with IWAN which is Cisco’s SD-WAN implementation (before Viptela acquisition).
EIGRP, Routing
EIGRP named configuration
You might think that EIGRP being around for so long is not getting any attention from Cisco, not true. EIGRP
OSPF, Routing
Tiebreakers with routes from different OSPF processes
This post is inspired by a discussion at Twitter with Ivan Pepelnjak and Nicolas Michel. Nicolas asked what happens when
CCIE, Routing
Route redistribution – filtering and mitigating loops
This post is about route redistribution and the different filtering techniques we have available in our toolbelt. This post requires
CCIE, OSPF, Routing
OSPF Vol1 finished
Finished OSPF Vol1 tonight. I should know pretty much everything about OSPF by now. Here are some advice that I
CCIE, RIP, Routing
RIP timers
RIP timers are the most basic thing in the world right? Even the command to set them is named timers