Intro This post looks at the pros and cons with BGP Route Reflection compared to running an iBGP full mesh. Full mesh Because iBGP routes are not propagated to iBGP sessions there must be a full mesh inside the BGP
BGP wedgies – Why isn’t my routing policy having effect?
Intro Brian McGahan from INE introduced me to something interesting the other day. BGP wedgie, what is that? I had never heard of it before although I’ve heard of such things occuring. A BGP wedgie is when a BGP configuration
Busting myths – PAgP desirable runs in silent mode by default
Time to bust another myth! Supposedly PAgP runs in silent mode by default in both desirable and auto mode. So what does silent mode do? “Use the silent mode when the switch is connected to a device that is not
RSTP synchronization – behind the scenes
RSTP synchronization is not widely understood and often oversimplified. This post describes how it really works in detail to give you the full picture.
Busting myths – Spanning tree portfast on the interface
I would like to bust a common myth. One that I’m probably guilty of preaching before as well. We all know that when portfast is enabled the port will bypass the listening and learning phase of STP. Portfast can be
I have been awarded the Cisco Learning Network Technical Excellence Award
Hi guys, Just a quick one. I’ve been awarded the Cisco Learning Network Technical Excellence Award for my contributions over there. It’s a great forum so you should check it out. Right now there are some webinars by members being
STP session up @ CLN
Hi, I’m done with the two Spanning Tree Protocol webinars at the Cisco Learning Network. You can find them here. They are located under the Routing&Switching section. Now on to CCDE studies!
I’m doing two lectures at Cisco Learning Network on spanning tree
Hi guys, I am going to be doing two lectures on spanning tree over at the Cisco Learning Network. The first one will be aimed for CCNA level plus and the second one will be aimed for CCNP level plus.
Netflow – top talkers
I got a request from a friend to describe the Netflow top talkers feature. Netflow is a Cisco proprietary protocol that is used to see which protocols are used in your network and how much traffic they are generating. Netflow
Cisco updates the Catalyst 2960 – Catalyst 2960-X and Catalyst 2960-XR
The Catalyst 2960 is a very common switch in any environment that has Cisco devices. A couple of years ago the 2960 got stacking via the 2960-S model. It also got the ability to do static routes which was a