Speaker for the Dead – Telnet
The idea of this article series is for me to play the part of a ‘Speaker for the Dead’ for technology that has or is becoming ‘end of life’ or legacy and/or irrelevant (or which should be). In this article, I’ll cover Telnet; the good, the bad, the ugly, the full (but brief) and honest […]
Author information
The post Speaker for the Dead – Telnet appeared first on Packet Pushers Podcast and was written by Steven Iveson.
Spanning Tree Nerd Knobs – Keeping It Classless Labs
This is a video on some of the “nerd knobs” that we get to play with in a traditional spanning tree environment. I have done a full writeup on the topic that goes along with this video - you can view this video on that page as well.[CCIE] Spanning-Tree Part 1 – Nerd Knobs
I wrote this post not only to put out some information on one of the least-understood facets of networking (especially in data center, as most technology today is aimed at making STP irrelevant) but also to help get something on paper for me, seeing as I am going down the CCIE path full force now, and this has always been a weak area of mine. This post will assume you have CCNP-level knowledge about Spanning Tree Protocol (STP).Spanning Tree Nerd Knobs – Keeping It Classless Labs
This is a video on some of the “nerd knobs” that we get to play with in a traditional spanning tree environment. I have done a full writeup on the topic that goes along with this video - you can view this video on that page as well.[CCIE] Spanning-Tree Part 1 – Nerd Knobs
I wrote this post not only to put out some information on one of the least-understood facets of networking (especially in data center, as most technology today is aimed at making STP irrelevant) but also to help get something on paper for me, seeing as I am going down the CCIE path full force now, and this has always been a weak area of mine. This post will assume you have CCNP-level knowledge about Spanning Tree Protocol (STP).Spanning Tree Nerd Knobs – Keeping It Classless Labs
This is a video on some of the “nerd knobs” that we get to play with in a traditional spanning tree environment. I have done a full writeup on the topic that goes along with this video - you can view this video on that page as well.[CCIE] Spanning-Tree Part 1 – Nerd Knobs
I wrote this post not only to put out some information on one of the least-understood facets of networking (especially in data center, as most technology today is aimed at making STP irrelevant) but also to help get something on paper for me, seeing as I am going down the CCIE path full force now, and this has always been a weak area of mine. This post will assume you have CCNP-level knowledge about Spanning Tree Protocol (STP).All Aboard the Application Train!
It’s been an interesting week so far… and it’s only Wednesday. In just a little over a day and a half, we’ve had hundreds of people stop by our booth at Cisco Live! and I wanted to share a few observations from those interactions:
- A significant number of people still do not know or understand much about SDN. This isn’t surprising and further underscores the disservice vendors have done at creating confusion that I wrote about a couple of weeks ago.
- When you talk about an application-centric approach to networking and network service automation, people get interested very fast, even when they are not building or using a cloud.
- Everyone is asking for examples of real use cases and deployments to help them determine which vendors they should engage/invest their time.
I suppose I shouldn’t be too surprised that networkers aren’t that familiar with software. Given that Cisco is talking a little more about software and software-defined networking these days, that’ll probably change by this time next year. In fact, Cisco spent much of Wednesday morning outlining its “vision” for application-centric infrastructure. From my perspective it’s a great thing to have Cisco promote the concept we’ve been pushing for a Continue reading
Speaker for the Dead – Spanning Tree Protocol
A friend of mine* text me early last week asking if I wanted to go to the cinema and watch the film After Earth. I couldn’t/wouldn’t go as I’m still up to my neck in book writing, but I thought I’d distract myself for a minute or two and read a few reviews of the […]
Author information
The post Speaker for the Dead – Spanning Tree Protocol appeared first on Packet Pushers Podcast and was written by Steven Iveson.
Networking Learning Paths – Route/Switch or Speciality Knowledge?
I spent the first ten years of my career in mobile telecoms. I learned a ton of lessons and I really enjoyed it, but I’ve always been drawn to networking. However I wasn’t getting hands-on exposure to data networks in my telco job so I had to teach myself. In 2002 I began the transition […]
Author information
The post Networking Learning Paths – Route/Switch or Speciality Knowledge? appeared first on Packet Pushers Podcast and was written by John Harrington.
VIRL – Why you need to know about it!
At Cisco Live in Orlando I had the chance to demo the Virtual Internet Routing Lab (VIRL). It is Cisco’s answer to GNS3 or Junipers’ Junosphere using virtualization to create virtual network topologies. This tools will be as revolutionary as GNS3, but at a much larger scale. It is an awesome tool that can be used for certification studying but also to validate production designs. Everyone I spoke to couldn’t wait to get their hands on it, including me!
Below is a screen shot of VIRL. It is using Oracles VMMaestro GUI based on Java. In the screen you can see network topology which is drop and drag. On the left side in purple there is a list of all saved networks. The right middle side has a list of supported devices. Top right side has all of the currently running devices and bottom right preconfiguration tabs. To access CLI of these routers, you has to run in simulation mode then Telnet to individual devices. The preconfiguration is a nice feature that allows you preconfigure IP addresses, Loopback interfaces or routing protocols like OSPF or BGP.
Virtual Internet Routing Laboratory screen shot.
VIRL supports virtualizing Cisco’s modified operations system. Cisco Continue reading
Regarding scale-out network virtualization in the enterprise data center
There's been quite a lot of discussion regarding the benefits of scale-out network virtualization. In this blog I present some additional thoughts to ponder regarding the value of network virtualization in the enterprise DC. As with any technology options, the question that enterprise network operators need to ask themselves regarding scale-out network virtualization is whether it is the right solution to the problems they need to address.To know whether scale-out network virtualization in the enterprise DC is the answer to the problem, we need to understand the problem in a holistic sense. Let's set aside our desire to recreate the networks of the past (vlans, subnets, etc, etc) in a new virtual space, and with an open mind ask ourselves some basic questions.
Clearly at a high level, enterprises wish to reduce costs and increase business agility. To reduce costs it's pretty obvious that enterprises need to maximize asset utilization. But what specific changes should enterprise IT bring about to maximize asset utilization and bring about safe business agility? This question ought to be answered in the context of the full sum of changes to the IT model necessary to gain all the benefits of the scale-out Continue reading
How do I Justify this?
“Say I’m convinced that my company should choose one technology over another. How can I tell the whole truth, cover all the bases, explain all the alternatives, while making certain I make the case that the technology I’ve made, or would like to make, is the right one?” In case you’ve ever wondered what it’s […]
Author information
The post How do I Justify this? appeared first on Packet Pushers Podcast and was written by Russ White.
DNS poisoned for LinkedIn. Affects us? Sure, it does.
If you were unable to access LinkedIn for almost the entire day earlier this week, then you can take solace in the fact that you were not the only one, not able to. Almost half the world shared your misery where all attempts to access LinkedIn (and several other websites) went awry. This purportedly happened because a bunch of hackers decided to poison the DNS entries for LinkedIn and some other well known websites (fidelity.com being another).
Before we delve into the sordid details of this particular incident lets quickly take a look at how DNS works.
Whenever we access linkedin.com, our computer must resolve this human-readable address “linkedin.com” into a computer-readable IP address like “216.52.242.86″ thats hosting this website. It does this by requesting a DNS server to return an IP address that can be used. The DNS server responds with one or more IP addresses with which you can reach linkedin.com. Your computer then connects to that IP address.
So where is this DNS server located that i just spoke about?
This DNS server lies with your Internet service provider, which caches information from other DNS servers. The router that we have at home also Continue reading
Last 24
1. Went to Dubai International airport at 1 am local time2. Stayed in Emirates business lounge, blogging to write about the recent Indonesian Networkers 17-19 June 2013 aka 100NGN Workshop in Jakarta
3. Got info there was delay for about an hour from the original 2.55 am local time
4. Continued blogging
5. At 3.30 am there was announcement the new schedule for the flight now is 6 am
6. Didn't want to sleep to avoid missing the flight, randomly browsing the Internet
7. Close to 6 am, no announcement about the boarding
8. Felt very sleepy so decided just to go to boarding gate around 6 am
9. Got into airplane around 6.30, flight finally took off at 7 am
10. Couldn't sleep during the 13.5 hours flight to JFK New York, watched lots of movies
11. Arrived 1.5 hours before my connecting flight
12. There was announcement from pilot, due to medical condition of one passenger all others must stayed inside airplane until the situation is cleared
13. Came out from airplane with only about an hour before the next flight to Orlando
14. Run to border security with Quick Connect paper Continue reading
PQ Show 25 – Cisco OTV Deep Dive Part 2
New voices gather in the Packet Pushers virtual boardroom for a discussion of Cisco’s layer 2 extension technology, Overlay Transport Virtualization (OTV). Ethan Banks hosts a recording of about two hours worth of content about OTV; this show is the second hour (well, almost another hour). Joining Ethan are first-time guests Jamie Caesar, Colby Glass and Ken Matlock. Jamie, Colby and Ken have […]
Author information
The post PQ Show 25 – Cisco OTV Deep Dive Part 2 appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Indonesian Networkers 2013 aka 100NGN
I’m currently sitting at Dubai airport, waiting for my flight to New York, then Orlando for Cisco Live US 2013. It’s going to be epic with so many breakout sessions, keynote speech by Cisco CEO, customer appreciation and CCIE party and many other great stuff for those who want to get the latest update and new innovation in computer networking from the market leader. Last year, Cisco Live US 2012 in San Diego set a record breaking of 17,000in-person attendees!
Earlier this week I took 5 days off from work to conduct 3 days workshop for 100 Indonesian professionals and 100 students, discussing the “next generation of computer networking”. We called it Indonesian Networkers 2013 aka 100NGN workshop that was held between 17-19 June.
With 100NGN workshop we want to prepare Indonesian professionals and students with best practices, soft skills and new direction in computer networking technology. And it’s been my personal obsession to bring world class event to Indonesia, just as Cisco Live.
Day 1 was started with keynote speech about building Network, Skill and Experience in order to become globally competitive professionals. Continued with Network Design lesson, MPLS VPN tutorial, and non-technical session like Killer CV.
Cisco Elastic Core, QoS Implementation in Mobile Network, next generation Data Center and Service Provider Wifi.
At the end of every session there was quiz with multiple choice questions. We used online polling system Textello to find the attendee with the highest score. The top scorer of Day 1 was rewarded with Google Nexus 7 tablet.
Day 2 agenda was CCIE and CCDE experience, WAN Architecture and Design, IP RAN 2G and 3G Implementation.
There was a session on Interview process in Silicon Valley, directly from an Indonesian who currently works in Silicon Valley, who was willing to come all the way for this event!
Evolution of Mobile Technology, E-Commerce Perimeter Security, IPv6 Implementation, Software Defined Network, OnePK and Internet of Everything.
The top scorer of Day 2 got Apple iPad Mini with “Indonesian Networkers 2013” written at the back.
Day 3 was designated for students. We want them to get the updates on Mobile technology, router architecture, SDN, IPv6 and Internet of Everything.
We event brought a speaker from one of the best universities in Indonesia to explain his research in SDN with GIST Korea to implement OpenFlow at TEIN research network.
Day 3 was closed with provocative session about communication skill to win in global competition by Dwi Chandra from DCT Enterprise. We gave away three Raspberry Pi to the students who became the top scorers of the day.
"Some people want it to happen, some wish it would happen, others make it happen" – Michael Jordan.
Thank you to our silver sponsor Cisco Advanced Services APAC. Thank you Gulfware for Textello, DCT, Cisco Academy and CCIE Club Indonesia.
I learned from David Novak, CEO of Yum! Brands, that the only way to make big things happen is by taking people with you. Thank you to all the speakers who were willing to come in between their busy schedule. Some speakers even came from outside the country or must travel from different city!
I'm very proud as young organization GEM Foundation and Jawdat are able to conduct an event like 100NGN.To all my team members, You make it happen! And once again, thank you to all speakers, sponsors and attendees!
3 days. 14 speakers. Total 199 participants. Network Design, MPLS VPN, Killer CV, Elastic Core, Mobile, QoS, DCN, SP Wifi, CCIE/CCDE, WAN Design, IP RAN 2G/3G, Interview, LTE, Security, IPv6 Implementation, Next Generation Router, SDN/OnePK, SDN Research, Communication skill, Internet of Everything!
My week-off couldn’t have been better.
Infusing Some Reality in the “Land of Make Believe”
As almost everyone in the networking community knows, next week is Cisco Live in Orlando, Florida. And as just about well…everyone knows, Orlando is the home of Disney World, a.k.a. the Land of Make Believe.
There are some that would have you believe that the software-defined networking (SDN) market is the land of make believe as well – lots of buzz words, catchy messaging and pretty PowerPoint slides. Embrane and our customers have a different view.
It’s a view we can’t wait to talk about next week. We have a lot to share with the show attendees. There’s a lot of synergy between Embrane and Cisco. Whether attendees want to talk about running applications on UCS or moving traffic through their data center or cloud environment with Nexus switches, we add a tremendous amount of value to those environments with our software-defined network services.
Speaking of UCS. Because I like a good Main Street, USA fireworks show as much as the blinking lights on a piece of hardware, I’m really looking forward to powering up the Cisco UCS chassis we are going to have in the booth. Then, just a few seconds after that spinning up software-defined firewalls Continue reading
Packet Pushers – Planned Shows & TweetUps at Cisco Live US 2013
Next week, the Packet Pushers are sponsored by Cisco to take the mobile recording studio to Cisco Live US (CLUS) in Orlando. We’ve been planning a lot of shows around what is the biggest IT conference of the year for those of us in the networking industry. The inimitable Mr. Ferro has posted some thoughts […]
Author information
The post Packet Pushers – Planned Shows & TweetUps at Cisco Live US 2013 appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Packet Design to Challenge Engineers at Cisco Live
Company Will Launch its "Do You Know Everything?" Campaign on the World of Solutions Exhibit Floor
Packet Design, the leading provider of IP network route analytics software, announced a new marketing campaign today at the 2013 Cisco Live Conference in Orlando, Florida.
Packet Design will introduce some levity to the serious world of IP networking by challenging visitors to its booth on their Knetwork Knowledge℠. Packet Design routing experts will test attendees on their expertise in IGP and BGP routing protocols, MPLS WANs, Layer 2 and 3 VPNs and RSVP-TE tunnels. Attendees will leave not only with a higher level of Knetwork Knowledge but also a tee shirt that gives them bragging rights. In addition, they will understand how Packet Design’s Explorer™ family of products:
- Gives real-time visibility into Layer 3 topology and routing for proactive service delivery management
- Allows replay of the topology and all routing events at any point in time for forensic analysis of network issues
- Enables interactive modeling to understand the impact on routing and traffic flows of planned network changes, new workloads and component failures.
“IP networking is complex and sometimes the people responsible for ensuring the availability and performance of critical networks Continue reading