I got this email from Joel which made my day. It is email like this that keep us motivated and feel that Ethan & I are creating something worthwhile. Sometimes ‘packet pushing’ is just a lot of work, sometimes it is great fun, sometime we make a bit of money from sponsors too. But knowing […]
The post Why We Do Packet Pushers – Email From a Listener appeared first on Packet Pushers Podcast and was written by Greg Ferro.
Have you ever struggled to explain to your parents or friends why you still study technical topics at night? It can be frustrating trying to explain to these people why you do what you do. Let’s be honest, it’s hard to explain ‘why’ to ourselves, never mind explain it to others. I have found a […]
The post Flow appeared first on Packet Pushers Podcast and was written by John Harrington.
I have been involved in various technical social networks and blogging for quite a while. Beginning in about 2008, I started spending a lot of time helping others over at the Cisco Learning Network. About the same time I launched PacketU.com. In May of 2013, John Harrington and I coordinated the site that you’re currently […]
The post Why Blog? appeared first on Packet Pushers Podcast and was written by Paul Stewart.
ManageEngine is a well known vendor of Network Management tools with tens of thousands of customers worldwide with a portfolio covering the full spectrum including Performance, Server/Application, Help Desk, Desktop Management. Sign up here
The post Webinar: ManageEngine on Log Analysis and Netflow appeared first on Packet Pushers Podcast and was written by Greg Ferro.
This show was recorded by Brent Salisbury at Open Networking Summit in April 2013 http://www.opennetsummit.org where he got a bunch of folks around a microphone to talk about OpenFlow/SDN and the progress being made in the organisations. Show topics How is OpenFlow progressing ? Open Daylight foundation and its inception. Is the future of OpenFlow assured and what […]
The post Show 157 – ONS Roundup – SDN,Enterprise, Wireless and More appeared first on Packet Pushers Podcast and was written by Greg Ferro.
How does the internet work - We know what is networking
Virtualisation In a world in which every day I hear virtualization at least 50 times it would be very strange that there is some part of our digital environment which is not yet virtualised. Today we can see that almost every piece of our server equipment is going to the cloud hence is being virtualised. That is not a […]
Your company decided to replace the existing Cisco devices with Juniper. The network team does that and configures the new Junipers as similar possible to the old Ciscos. But something does not work as intended. What is it ?
Back in the springtime of this year, I saw that Coursera was going to be offering a free six-week SDN MOOC taught by Dr. Nick Feamster, an Associate Professor at Georgia Tech’s School of Computer Science. As I had already been learning about and investigating this new SDN world in my free time, I thought […]
The post A review of the recent Coursera SDN MOOC appeared first on Packet Pushers Podcast and was written by Will Dennis.
These days, access to the web means that users are simply a click away from discovering anything – from how to expertly mollycoddle their Macs to the secret to a perfect cup of tea. But, as we all know, not everything is perfect. Many e-learning services do not have the luxuries of the time and […]
The post NetworkFaculty.com: Bite-sized IT Training Videos On Demand appeared first on Packet Pushers Podcast and was written by Sponsored Blog Posts.
There is probably no more stressful stage in the interview process than negotiating your salary. You usually don’t know entirely what to ask for. You have a feel for what you would like, but most of us have a healthy fear of leaving money on the table. We are less worried about asking for too […]
The post Negotiating your salary appeared first on Packet Pushers Podcast and was written by Michael Bushong.
Packet Design will be exhibiting at Cisco Live 2015, November 2-5, 2015 in Cancun, Mexico.
Register to attend the event here:http://www.ciscolive.com/latam/
Packet Design will be exhibiting at Cisco Live 2015, Jan 26-30 in Milan, Italy.
Register to attend the event here:
http://www.ciscolive.com/emea/
This episode (re-)introduces Carl Moberg and dives into Tail-f’s Network Control System (NCS). We talk through the moving parts of Network Control System at a technical level and discuss why you should care about this product. If you have been interested in tools that do multivendor automation of the network then you will be interested in this discussion.
The post Show 156 – Tail-f Network Control System – Sponsored appeared first on Packet Pushers Podcast and was written by Greg Ferro.
I mentioned in my Tcpdump Masterclass that Wireshark is capable of decrypting SSL/TLS encrypted data in packets captured in any supported format and that if anyone wanted to know how for them to ask. Someone did, so here it is. This is an extremely useful Wireshark feature, particularly when troubleshooting within highly secure network architectures. […]
The post Using Wireshark to Decode SSL/TLS Packets appeared first on Packet Pushers Podcast and was written by Steven Iveson.
Policers and shapers identify traffic violations in an identical manner, but treat them differently. Policers perform instantaneous checks and immediately take action when a violation occurs. Actions can include marking, dropping, and even just transmitting the packet. Shapers on the other hand are traffic-smoothing tools. Its objective is to send all traffic out a given interface, but to smooth it out so that it never exceeds a given rate – usually in order to meet SLAs. Excess traffic is buffered and delayed until the traffic once again dips below the defined maximum rate.
| Policer | Shaper |
| Causes TCP resends as traffic is dropped | Delays traffic; involves less TCP resends |
| Inflexible; makes instant drop decisions | Adapts to network congestion by queuing excess traffic |
| Ingress or egress interface tool | Typically egress only |
| Rate limiting – no buffering | Rate limiting with buffering |
While policing and shaping tools are not employed to directly provide QoS for real-time traffic, they do regulate/stabilize traffic flows so that unexpected bursts in data traffic do not induce jitter and latency that adversely affects real-time traffic.
Policers determine whether each packet conforms, exceeds, or violates the policies configured for traffic, and takes the prescribed action Continue reading
In 1943, Spanish officials recovered the body of a spy from the Atlantic coast of Huelva. The suitcase still attached to his arm contained Allied war plans, identifying Greece and Sardinia as the beachhead for the forthcoming assault on Italy. Amazed by their luck, Axis forces redeployed divisions from Sicily, Northern France, and the Eastern […]
The post Operation (Unicorn?) Mincemeat, Counter Security, and a book about JWAS appeared first on Packet Pushers Podcast and was written by Glen Kemp.
This is the solution for quiz-13 that covers Frame Relay, a topic that is very hard to find it implemented in today's networks but often seen during certification exams, as it still part of the curriculum for some of them. This is about differences between static and dynamic frame relay mappings.
“Should I get a second CCIE, or a CCDE?” A number of people have asked me this recently; in the process of answering those questions, I’ve developed a couple of lines of reasoning that I thought worth sharing here. No, I’ve not been posting much recently — I’m wrapped up in a bunch of different […]
