Your Company Doesn’t Care About You

  Companies are Systems for Making Money We’ve all heard corporate leadership speak about ‘human resources’ and that ‘people are our most important asset’. This is true but the words ‘resource’ and ‘asset’ were carefully chosen. A resource is something to be mined for value. Please don’t be fooled into thinking that your company cares […]

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John Harrington

John is an experienced data center engineer with a background in mobile telecoms. He works as a network test engineer for a large cloud service provider, and is gradually accepting that he's a nerd. He blogs about network technology and careers at theNetworkSherpa.com. You can reach him on twitter at: @networksherpa

The post Your Company Doesn’t Care About You appeared first on Packet Pushers Podcast and was written by John Harrington.

[Code] PowerTool: PowerOnUCSBlades

# ---------------------------------------------------------------------- # Name: PowerOnUCSBlades.ps1 # Author: Matthew Oswalt # Created: 3/30/2012 # Revision: v0.2 - BETA # Rev. Date: 4/30/2013 # Description: A script that powers on blades in a UCS system. # Can be configured to boot all blades, or # only those associated to service profiles in a # given sub-organization. # ---------------------------------------------------------------------- # Import the Cisco UCS PowerTool module Import-Module CiscoUcsPs #Enable Multiple System Config Mode Set-UcsPowerToolConfiguration -SupportMultipleDefaultUcs $true ##################################################################################################################### # AUTHENTICATION # #################################### #Stored method of authentication - change the two values shown below $user = "admin" $password = "password" | ConvertTo-SecureString -AsPlainText -Force $cred = New-Object system.

[Code] PowerTool: PowerOnUCSBlades

———————————————————————- # Name: PowerOnUCSBlades.ps1 # Author: Matthew Oswalt # Created: 3/30/2012 # Revision: v0.2 - BETA # Rev. Date: 4/30/2013 # Description: A script that powers on blades in a UCS system. # Can be configured to boot all blades, or # only those associated to service profiles in a # given sub-organization. # ---------------------------------------------------------------------- # Import the Cisco UCS PowerTool module Import-Module CiscoUcsPs #Enable Multiple System Config Mode Set-UcsPowerToolConfiguration -SupportMultipleDefaultUcs $true ##################################################################################################################### # AUTHENTICATION # #################################### #Stored method of authentication - change the two values shown below $user = "admin" $password = "password" | ConvertTo-SecureString -AsPlainText -Force $cred = New-Object system.

SDN: Stop Differentiating by Names

Why does it happen with every technology cycle? First, there’s a period of great innovation, followed by the introduction of new terms and categories, which is always followed by a frenzy of differentiation-by-acronym. Everyone gets caught up in talking to each other and one-upping each other, instead of remembering why there was innovation in the first place. I call it “the yearbook effect,” and the networking industry and those who work in it, watch it and write about it are fully entrenched in it right now.

Think about it. SDN, NFV, OpenFlow, controllers, consortiums to build controllers, control plane separation, overlays, blah blah blah.

The industry has gotten so wrapped up in talking about definitions of SDN, the various technologies and how they get implemented, we actually may help delay adoption. We are supposed to be trying to help customers, but we are focusing on the wrong things and it’s confusing them.

I may get kicked out of the SDN fan club for saying this, but I’ve come to the conclusion after speaking to dozens of customers and participating in various industry discussions, any delay in widespread adoption of SDN is our own fault.

People are rarely, if ever, talking Continue reading

Show 148 – Talking With OpenDaylight Leadership

The Packet Pushers are joined by Brent Salisbury of networkstatic.net for a chat with some of the top brass on the OpenDaylight project’s Technical Steering Committee, Dave Meyer and Inder Gopal. “What’s OpenDaylight?” you ask. Why, it’s a consortium of vendors working together under the Linux Foundation umbrella to make an open source reference framework […]

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Ethan Banks

Co-host at Packet Pushers

Ethan Banks, CCIE #20655, has been managing networks for higher ed, government, financials and high tech since 1995. Ethan co-hosts the Packet Pushers Podcast, which has seen over 3M downloads and reaches over 10K listeners. With whatever time is left, Ethan writes for fun & profit, studies for certifications, and enjoys science fiction. @ecbanks
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The post Show 148 – Talking With OpenDaylight Leadership appeared first on Packet Pushers Podcast and was written by Ethan Banks.

Outgoing Interface Determination

I received a comment on an old post regarding the identification of outgoing interface for learned routes through BGP. In fact, it’s not the first time I’ve had a discussion in the comment section regarding the interaction between the control plane and the forwarding plane. So, let’s work backwards from the point where our packet leaves some interface on a router, which would be considered purely an act of the forwarding plane.

Outgoing Interface Determination

I received a comment on an old post regarding the identification of outgoing interface for learned routes through BGP. In fact, it’s not the first time I’ve had a discussion in the comment section regarding the interaction between the control plane and the forwarding plane. So, let’s work backwards from the point where our packet leaves some interface on a router, which would be considered purely an act of the forwarding plane.

Making sense of Broadband networks – Part 1

Broadband is a hot topic in the telecommunications industry nowadays; it is becoming the bread and butter for so many service providers and mobile carriers with the big growth and penetration rates in these technologies in the recent years.  ( Check this report about the EOCD countries). Although it is that important, broadband topics probably [...] No related posts. Related posts brought to you by Yet Another Related Posts Plugin.

Network Design Challenge – Small Little Clouds

At work, we’ve been getting ready to deploy a few different cluster technologies. One is a set of KVM hosts to offer VMaaS functionality to end users. Another is a CEPH cluster (http://ceph.com/) which is smart distributed storage. The third is a Hadoop cluster. Each of these initiatives popped up around the same time and […]

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Mike Kantowski

Mike Kantowski

I started designing and operating data networks in 1999. Since then, I've worked for organizations large and small, and a couple in between. I currently focus on low latency, high frequency financial trading networks.

@netdad on Twitter

The post Network Design Challenge – Small Little Clouds appeared first on Packet Pushers Podcast and was written by Mike Kantowski.

Programming 101 for Network Engineers – Basic Language Elements & Concepts 2

Welcome to the fourth part of the Programming 101 for Network Engineers series and part two of the Basic Language Elements and Concepts article. The following overview of programming language elements and those found in part three will provide a good foundation that can be built upon as we move into other topics and the detail […]

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Steven Iveson

Steven Iveson

Steven Iveson, the last of four children of the seventies, was born in London and has never been too far from a shooting, bombing or riot. He's now grateful to live in a small town in East Yorkshire in the north east of England with his wife Sam and their four children.

He's worked in the IT industry for over 15 years in a variety of roles, predominantly in data centre environments. Working with switches and routers pretty much from the start he now also has a thirst for application delivery, SDN, virtualisation and related products and technologies. He's published a number of F5 Networks related books and is a regular contributor at DevCentral.

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The post Programming 101 for Network Engineers – Basic Language Elements & Concepts 2 appeared first on Packet Pushers Podcast and was written by Continue reading

Build a Career with Relationships

Your job hunt traditionally starts with websites like monster.com or dice.com.  However, some surveys suggest that between 70 to 80 percent of jobs are found through personal contacts and relationships. So why not spend your efforts building your relationships instead of surfing jobs sites? I can sense some of you getting uncomfortable already. Dont worry, […]

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John Harrington

John is an experienced data center engineer with a background in mobile telecoms. He works as a network test engineer for a large cloud service provider, and is gradually accepting that he's a nerd. He blogs about network technology and careers at theNetworkSherpa.com. You can reach him on twitter at: @networksherpa

The post Build a Career with Relationships appeared first on Packet Pushers Podcast and was written by John Harrington.

[Virtual Routing] Part 4 – The Use Case

Moving along in my “Virtual Routing” series, I’d like to switch gears and talk a little more “big picture”. In the previous posts, we’ve discussed a few different things: Part 1 - A first look at the CSR 1000v from Cisco Part 2 - An examinations of using FHRPs in a virtual environment Part 3 - A comparison of virtual routing redundancy options Seeing as these were all pretty technical configuration-oriented posts, I wanted to take a step back and think about some of the reasons why one would want to perform routing in a virtual environment.

[Virtual Routing] Part 4 – The Use Case

Moving along in my “Virtual Routing” series, I’d like to switch gears and talk a little more “big picture”. In the previous posts, we’ve discussed a few different things: Part 1 - A first look at the CSR 1000v from Cisco Part 2 - An examinations of using FHRPs in a virtual environment Part 3 - A comparison of virtual routing redundancy options Seeing as these were all pretty technical configuration-oriented posts, I wanted to take a step back and think about some of the reasons why one would want to perform routing in a virtual environment.

[Virtual Routing] Part 4 – The Use Case

Moving along in my “Virtual Routing” series, I’d like to switch gears and talk a little more “big picture”. In the previous posts, we’ve discussed a few different things: Part 1 - A first look at the CSR 1000v from Cisco Part 2 - An examinations of using FHRPs in a virtual environment Part 3 - A comparison of virtual routing redundancy options Seeing as these were all pretty technical configuration-oriented posts, I wanted to take a step back and think about some of the reasons why one would want to perform routing in a virtual environment.

Review: ScienceLogic – One Network Management Tool To Rule Them All?

ScienceLogic has been getting the right kind of press recently – e.g. they were a winner of Best of Interop 2013 – Management & Monitoring, and Infoworld had some rather nice things to say. They’ve got some high-profile customers too, such as Fasthosts and Equinix. But what exactly is their product all about, and is it any […]

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Lindsay Hill

Network Management Consultant

Lindsay (@northlandboy) is a network management consultant, with experience across networks, servers, applications and security. He is CCIE #36708, RHCE, CISSP and HP MASE. More of his own content is at lkhill.com.
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The post Review: ScienceLogic – One Network Management Tool To Rule Them All? appeared first on Packet Pushers Podcast and was written by Lindsay Hill.

Quiz #14 &#8211 Default Originate into OSPF

Your network follows a standard 3 tier hierarchical design (Core, Distribution, Access) and has two WAN circuits with eBGP sessions with the ISPs. You want to push the default route down to the Distribution routers, but something goes wrong. Where is the mistake?

Mrs. Y’s Rules for Security Bloggers

Recently Greg Ferro published an e-book for bloggers, “Arse First Method of Technical Blogging.” It has some great suggestions (although I’m not sure what an arse is), but after reading it, I realized it really doesn’t apply to security blogging. Without further ado, here are some of my tips for good infosec blog posts. 1. […]

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Mrs. Y

Snarkitecht at Island of Misfit Toys

Mrs. Y is a recovering Unix engineer working in network security. Also the host of Healthy Paranoia and official nerd hunter. She likes long walks in hubsites, traveling to security conferences and spending time in the Bat Cave. Sincerely believes that every problem can be solved with a "for" loop. When not blogging or podcasting, can be found using up her 15 minutes in the Twittersphere or Google+ as @MrsYisWhy.
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The post Mrs. Y’s Rules for Security Bloggers appeared first on Packet Pushers Podcast and was written by Mrs. Y.

Nexus – iBGP with BFD

I’ve been trying to setup a BFD neighbor for a link connecting two important sites on a Nexus 7010. That link is only using iBGP for routing.  This seems like a really easy thing to, unless you run into bad documentation with few key missing facts.

I was reading the Nexus 7000 Cisco Configuration Guide for Enabling BFD for BGP at http://www.cisco.com/en/US/docs/switches/datacenter/sw/6_x/nx-os/interfaces/configuration/guide/if_bfd.html. The document specifies that all you have to do to enable BFD for BGP is :

1. enable the bfd feature,
2. enable bfd on an interface
3. enable bfd under the BGP neighbor.

See below for the configuration as specified by Cisco.

feature bfd

interface Ethernet1/10
  bfd interval 100 min_rx 100 multiplier 5

router bgp 65100
 neighbor 172.16.2.1 remote-as 65100
  bfd

The problem with this feature is that BFD won’t see each other as neighbors. You won’t see any debug messages or keepalives or any other bfd packets. When I was troubleshooting it, I noticed that by specifying a source and destination IP address for BFD neighbors (under the interface) brought up the adj. The problem with that was that BGP didn’t recognize that IP address and during testing, BFD Continue reading

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