A Data Center Delivers Apps – So Shouldn’t We Monitor App Delivery?
Dinner with His Toadishness, Derick Winkworth, the other night rolled into a 3+ hour discussion of avant garde ways to do networking. One of the adjunct topics that came up was that of ownership within IT. Ownership is a complex problem in the data center, because there’s many complex technologies at work. No one single […]
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The post A Data Center Delivers Apps – So Shouldn’t We Monitor App Delivery? appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Machine Fragile
Yesterday, a “breaking news” tweet at 1:07 PM EDT from the Associated Press reported that two explosions had occurred at the White House and President Obama had been injured. The news immediately sent the Dow Jones Industrial Average down 143 points, as this graph at the London Telegraph shows. There’s also a lovely animated display […]
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The post Machine Fragile appeared first on Packet Pushers Podcast and was written by Russ White.
Quiz #13 – Frame Relay self pinging
You have recently joined a new company that still uses Frame Relay. For monitoring purposes, you implement a script that pings all interfaces of a router, but you notice that some of them are not ping-able. Why ?
It Works and It Should Be Better
You say, “It works – don’t fix it.” I hear, “It works – don’t touch it.” I’m also thinking that if you don’t touch it, then it’s never upgraded or changed. Is a static, unchanged network the best you can do to support your business ? Are you happy with just doing more of the same […]
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The post It Works and It Should Be Better appeared first on Packet Pushers Podcast and was written by Greg Ferro.
What can you learn in 5 minutes a day !
I believe in minimalism and what small focused actions can make for a person and small steps is what Juniper learning bytes is all about. Learning bytes is an online learning resource launched last year by Juniper education services organization as a free service. The nice thing about the learning bytes is that they are focused, [...] No related posts. Related posts brought to you by Yet Another Related Posts Plugin.Your Job Hunt is YOUR Responsibility
Earlier this week, I read the article below. This article took a strong stance that a recruiter works for the employer, not those seeking employment. I think there are some valid points made. However, my views are a little less extreme than that of the author. NEWSFLASH: A Recruiter is Not a Job Finder!. Frankly, […]
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The post Your Job Hunt is YOUR Responsibility appeared first on Packet Pushers Podcast and was written by Paul Stewart.
FusionIO Acquires Nexgen
For anyone keeping tabs on the storage industry these days, you might have noticed the news today regarding FusionIO’s acquisition of Nexgen - one of a myriad of storage startups that have cropped up in the past few years to address the ever-changing needs of the data center industry. After looking through some of the articles that were published today, I think we all understand the financial details behind the transaction.FusionIO Acquires Nexgen
For anyone keeping tabs on the storage industry these days, you might have noticed the news today regarding FusionIO’s acquisition of Nexgen - one of a myriad of storage startups that have cropped up in the past few years to address the ever-changing needs of the data center industry. After looking through some of the articles that were published today, I think we all understand the financial details behind the transaction.Notes On AAA
Enabling aaa new model means the switch will try and match all login attempts using a aaa method.
First, define the TACACS or RADIUS server using:
tacacs-server host <IP-address> <optional key value>
There are some other values you can use, but I’ve never had to use these.
Now, give your authentication method a name:
aaa group server tacacs+ <method-name> server <IP-address>
Call the method for authenttication
aaa authentication login default group <method-name> group <fallback method name if configured> local
You should now be good to go!
DHCP client testing tool
DHCP is vastly growing in service provider networks for broadband subscribers, I had the chance to work lately with a some of these setups. The protocol is really easy to configure for broadband and provide many benefits. It has lower overhead compared to PPPOE and it is much more suitable for Multicast services. For those [...] No related posts. Related posts brought to you by Yet Another Related Posts Plugin.Programming 101 for Network Engineers – Preparation
Okay, let’s say you’re convinced you need to learn to programme and you don’t want to be left behind. The earlier you start, the more you can pick up (and the sooner you’ll become consciously competent) at a pace that suits you. Hopefully, you’ll be able to blend this into your schedule with whatever else you […]
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The post Programming 101 for Network Engineers – Preparation appeared first on Packet Pushers Podcast and was written by Steven Iveson.
Playing with event-scripts
Last week, I worked on 2 small projects in 11.4 Junos. I should: - Find a way to automatically disable a physical link when LACP "flapped" too many times during a given time. - Find a way to automatically disable a physical link when too many CRC errors...Playing with event-scripts
Last week, I worked on 2 small projects in 11.4 Junos. I should: - Find a way to automatically disable a physical link when LACP "flapped" too many times during a given time. - Find a way to automatically disable a physical link when too many CRC errors...Playing with event-scripts
Last week, I worked on 2 small projects in 11.4 Junos. I should: - Find a way to automatically disable a physical link when LACP "flapped" too many times during a given time. - Find a way to automatically disable a physical link when too many CRC errors...DCI Series: Overlay Transport Virtualization
This is the third article in my series on Data Center Interconnection (DCI). In the first (Why is there a “Wrong Way” to Interconnect Data Centers?) I wrote about the risks associated with DCI when the method chosen is to stretch Layer 2 domains between the data centers. In the second article (DCI: Why is Stretched Layer 2 Needed?) I wrote about why the need exists for stretching Layer 2 domains between sites and also touched on why it's such a common element in many DCI strategies.Routing iSCSI Traffic
This post was initiated by a side conversation I had about iSCSI. From time to time I’m required to implement an iSCSI-based solution, and this is not the first time I’ve heard the question: “So why can’t I route iSCSI traffic?” Most folks with any knowledge of storage protocols will have at some point picked up this informal best practice idea; some will vehemently defend this idea as the word of $deity and shun all those who contradict this truth.Routing iSCSI Traffic
This post was initiated by a side conversation I had about iSCSI. From time to time I’m required to implement an iSCSI-based solution, and this is not the first time I’ve heard the question: “So why can’t I route iSCSI traffic?” Most folks with any knowledge of storage protocols will have at some point picked up this informal best practice idea; some will vehemently defend this idea as the word of $deity and shun all those who contradict this truth.Fabricpath Design, Think it Through! – part 1
What is FabricPath FabricPath is a Layer–2 routing architecture (yes L2 routing), using ISIS to build shortest path trees to destination bridges (using their bridge-id). Cisco offers plenty of...[[ Summary content only, you can read everything now, just visit the site for full story ]]
Arduino: Using my MelodyUtils library for R2-D2 style chirps
As part of a small robotics project I've been working on this weekend (affectionately called CoBe1, there will be a follow up blog on that soon) I decided to give by robot some personality in the form a a voice, and uploaded some of my code to GitHub.