Not All OSPF Inter-area Traffic Traverses Interfaces In Area 0
Everyone knows that OSPF is a link state protocol. Those that study also discover that OSPF behaves like distance vector […]
OSPF
OSPF
OSPF
Why Are OSPF Type 5 LSAs Flooded?
I recently saw a great question on Reddit, on why Type-5 (AS-external) LSAs are flooded, in comparison to Type-3 (Summary)
BGP, OSPF
Valley-free Routing in Leaf and Spine Topology
Valley-free routing is a concept that may not be well known but that is relevant to datacenter design. In this
BGP, OSPF
Is One Protocol Simpler Than Two?
I’ve been in a lot of interesting discussions the last couple of days on what protocol to use for the
OSPF
Unnumbered Links In OSPF
This post is going to be a real deep dive! First, I want to send my sincere thanks to the
OSPF
OSPF Convergence In a Hub and Spoke Topology
My dear friend Micheline Murphy posted an excellent question on OSPF in a Hub and Spoke topology at the Cisco
CCDP, OSPF
OSPF Design Considerations
Introduction Open Shortest Path First (OSPF) is a link state protocol that has been around for a long time. It
Frame relay, OSPF
OSPF – Non Broadcast and Point to Multipoint
Introduction There was a discussion on a forum about the point to multipoint network type in OSPF. What is the
Catalyst, Convergence, Network Design, OSPF
Why fast IGP timers aren’t always beneficial
Introduction When tuning your IGP of choice, the first thing people look at is usually the hello and dead interval.
BGP, MPLS, OSPF
Some pointers on OSPF as PE to CE protocol
There was a discussion at the Cisco Learning Network (CLN) about OSPF as PE to CE protocol. I wanted to