Using Big Tools for Small Problems

regrigerator-smart-car

BGP in the data center? And MPLS? Are you insane? Well, maybe, yes. But then again, I've been known to do a lot of crazy … [Read more...]

ERSPAN – My New Favorite Packet Capturing Trick

Wireshark ERSPAN Capture

When I first looked at the documentation for ERSPAN I could imagine some uses for it. In some cases it could replace RSPAN, … [Read more...]

Video over Internet

Video_Drop

Couple days ago I made an interesting talk about Video Traffic over Internet. Sales engineer goes to company and he claims … [Read more...]

Planning a Project Before Your Execution

This year I have worked on a number of projects and most of them had no planning while others had very little. The planning … [Read more...]

Anycast HSRP and Design Considerations

hsrp

HSRP is the first hop redundancy Cisco property protocol which allows a transparent failover of the first-hop gateway. Many … [Read more...]

Has SDN Changed Networking?

Software Defined Everything, NFV, OpenFlow, SDDC and Orchestrators are buzz words of DC networking. An interesting point … [Read more...]

Out with the old, in with the new

blog_carl_niger

A few weeks ago I was asked to help a client turn up and move everything over to a new network. I have done this many times … [Read more...]

Using VRFs to maintain security zones in an Layer 3 datacenter network

Layer 2 Network Diagram

The number of overlay technologies available today for the datacenter are numerous and highly functional. The flexibility … [Read more...]

The Secret Sauce for Network Services

OTV

Tunneling is the Duct Tape of Networking..It is interesting to realize that a big chunk of network features in Data Center, … [Read more...]

Cisco ACI – Speculation of its Inner Workings

ACI1

Last week I was at a Cisco users group meeting where some sales engineers were giving a presentation on the new Application … [Read more...]

Network Topologies

Figure_1

Resiliency of the networks is almost the most important design criterion which needs to be considered. Packets need to be … [Read more...]

Masterclass – Tcpdump – Interpreting Output

utilities-system-monitor

This Masterclass article series aims to provide in-depth technical information on the installation, usage and operation of … [Read more...]

Masterclass – Tcpdump – Expressions

This Masterclass article series aims to provide in-depth technical information on the installation, usage and operation of … [Read more...]

Masterclass – Tcpdump – Parameters

This Masterclass article series aimes to provide in-depth technical information on the installation, usage and operation of … [Read more...]

Masterclass – Tcpdump – Basics

This Masterclass article series aimes to provide in-depth technical information on the installation, usage and operation of … [Read more...]