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WHAT IS A TRANSPORT VRF? What do I mean be a transport VRF, lets expand on that a bit. The transport VRF is used to carry tunnel source, to tunnel destination traffic. Simplistic example, imagine a...

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BGP Peer in wrong AS

Original content from Roger's CCIE Blog Tracking the journey towards getting the ultimate Cisco Certification. The Routing & Switching Lab Exam
When configuring BGP with a remote peer you might get the error message BGP peer in wrong AS *Apr 18 08:39:15.455: %BGP-3-NOTIFICATION: received from neighbor 10.0.12.2 passive 2/2 (peer in wrong AS) 2 bytes 0002 This means that you have mis-matched AS numbers in your BGP configuration. You can phone up the remote end and […]

Other pages of interest:

Post taken from CCIE Blog

Original post BGP Peer in wrong AS

My Schedule for Cisco Live 2014

Everything is in order for my trip to Cisco Live 2014 in San Francisco. Conference passes are purchased. Hotels are reserved. Flights are booked. It’s going to be a great event, and I can’t wait!

Note: My wife will be with me again this year, and she is trying to get a tour group going to look around the city while others are in sessions. If you want to be in on the tourist action, contact her via Twitter.

As per tradition (a new tradition, but a tradition nonetheless), here is my schedule for the week. Also as tradition, I’m bound to only do about 20% of what’s documented here. If you’ve ever been, you know what I mean. Here we go.

<strong>Saturday, May 17</strong>
<strong>13:00</strong> - Arrive in SFO

<strong>Sunday, May 18</strong>
<strong>14:00</strong> - Exam
<strong>16:00</strong> or so - Tweetup

<strong>Monday, May 19</strong>
<strong>08:00</strong> - <a href="https://www.ciscolive2014.com/connect/sessionDetail.ww?SESSION_ID=2182">BRKCRT-2001 - NX-OS, IOS, IOS-XR, 
</a>     <a href="https://www.ciscolive2014.com/connect/sessionDetail.ww?SESSION_ID=2182">Unique and Similar at the Same Time</a> w/ <a href="https://www.ciscolive2014.com/connect/speakerDetail.ww?PERSON_ID=767D7F27ADC21F9EC5B18A984682E57E/?cid=000334090">Joseph Rinehart</a>
<strong>10:00</strong> - <a href="https://www.ciscolive2014.com/connect/sessionDetail.ww?SESSION_ID=3114">BRKCRT-2000 - HardCore IPv6 Routing - No Fear</a> 
     w/ Scott Morris, Donnie Moss
<strong>13:00</strong> - <a  Continue reading

Dealing with MySQL resource shortage

You may in life while working with mysql get the following errors:

ERROR 1016 (HY000) at line 1: Can't open file: './blah/table.frm' (errno: 24)

``` SQL Error (23): Out of resources when o

What is the value proposition of Standards in the age of Open Source?

I’ve been thinking about this question quite a bit over the last year [0] and interestingly a debate over just this issue has recently erupted in the blogosphere (and elsewhere). Vidya Narayanan, who reignited the discussion with her blog “Why I Quit Writing Internet Standards” [1], calls for a “radical restructuring” of the IETF, IEEE and what […]

Author information

David Meyer

David Meyer is currently CTO and Chief Scientist at Brocade Communications, where he works on future directions for Internet technologies. Prior to joining Brocade, he was a Distinguished Engineer at Cisco Systems, where he also worked as a developer, architect, and visionary on future directions for Internet technologies. He is currently the chair of the Technical Steering Committee of the OpenDaylight Project. He has been a member of the Internet Architecture Board (IAB) of the the IETF (www.ietf.org) and the chair/co-chair of many working groups. He is also active in the operator community, where he has been a long standing member of the NANOG (www.nanog.org) program committee (and program committee chair from 2008-2011). He is also active in other standards organizations such as ETSI, ATIS, ANSI T1X1, the Open Networking Foundation, and the ITU-T.

Mr. Meyer Continue reading

Networking and the Consumption Model

I’ve talked with all kinds of IT professionals in the past year or so about building an organization of various IT disciplines that are truly service-oriented towards each other and to the other parts of the business. While I will never claim to be an expert in business development and will always claim allegiance to the nerdy technical bits, it’s easy to see the value in such an organizational model, and very interesting to explore the changes that technical people can make to push for such an approach. Let’s bring this down to earth a bit.

Compute

Server Virtualization is old news now, so lets go back about 15 years before it was even really on the scene. You’ve heard the arguments for server virtualization, and the description of this “ancient age” – servers were provisioned on a 1:1 basis with applications, they took weeks to provision or replace, and the capex/opex costs were way too high because on the one hand, the sheer amount of hardware necessary to run your apps was outrageously expensive, and on the other hand, the power and cooling required to constantly run them was no better.

Lets think about the kind of resources Continue reading

BGP communities

How does the internet work - We know what is networking

O men, when you start to write about BGP it is probably the time then you seriously start questioning yourself where did I go with myself. That is probably the moment in which you realize that there is a network geek sitting somewhere inside you. At least that is what happened to me when I […]

BGP communities

It was Inevitable…

Author information

Russ White

Principle Engineer at Ericsson

Russ White is a Network Architect who's scribbled a basket of books, penned a plethora of patents, written a raft of RFCs, taught a trencher of classes, and done a lot of other stuff you either already know about, or don't really care about. You want numbers and letters? Okay: CCIE 2635, CCDE 2007:001, CCAr, BSIT, MSIT (Network Design & Architecture, Capella University), MACM (Biblical Literature, Shepherds Theological Seminary). Russ is a Principal Engineer in the IPOS Team at Ericsson, where he works on lots of different stuff, serves on the Routing Area Directorate at the IETF, and is a cochair of the Internet Society Advisory Council. Russ will be speaking in November at the Ericsson Technology Day. he recently published The Art of Network Architecture, is currently working on a new book in the area of network complexity with Addison Wesley, a book on innovation from within a Christian worldview, and he blogs at ntwrk.guru on network engineering.

The post It was Inevitable… appeared first on Packet Pushers Podcast and was written by Russ White.

Networking and the Consumption Model

Rant: Living with Legacy and Public Cloud Farting

No matter how hard the clouderati click the heels of their brogues together and repeat “public cloud is better” , the simple fact is that most companies have large amounts of IT infrastructure that works just fine and is profitable. To make matters worse, the cost of transformation exceeds the potential financial return while creating […]

The post Rant: Living with Legacy and Public Cloud Farting appeared first on EtherealMind.

Network Namespace Provisioning

I’d written previously on how to use OpenContrail with Linux network namespaces. I managed to find the cycles to put together a configuration wrapper that can be used as a pre-start and post-stop scripts when starting a daemon out of init.d. The scripts are in a python package available in github.

As in the previous post, the test application i used was the apache web server. But most Linux services follow a rather similar pattern when it comes to their init scripts.

I started by installing two bare metal servers with the OpenContrail community packages; one server running the configuration service and both of them running both control-node and compute-node components.

For this exercise, the objective was to be able to select the routing for the outbound traffic for a specific application. For this purpose, I started by creating two virtual-networks, one used for incoming traffic and separate one to be used for outbound traffic for a specific application. The script network_manage.py can be used for this purpose; it can create and delete virtual-networks as well as add and delete external route targets.

After creating an inbound and app-specific outbound networks, one can use the netns-daemon-start script to create Continue reading

Show 186 – The Silicon Inside Your Network Device – Part 1

This is Part 1 in a special series looking at the inside of your network device. Although software will be at heart of network innovation, it will still run on hardware and it’s time to expose the internals of our network hardware and understand the hardware architecture inside a typical device. Many people are surprised […]

Author information

Greg Ferro

Greg Ferro is a Network Engineer/Architect, mostly focussed on Data Centre, Security Infrastructure, and recently Virtualization. He has over 20 years in IT, in wide range of employers working as a freelance consultant including Finance, Service Providers and Online Companies. He is CCIE#6920 and has a few ideas about the world, but not enough to really count.

He is a host on the Packet Pushers Podcast, blogger at EtherealMind.com and on Twitter @etherealmind and Google Plus.

The post Show 186 – The Silicon Inside Your Network Device – Part 1 appeared first on Packet Pushers Podcast and was written by Greg Ferro.

Response: RFC 7167 – A Framework for Point-to-Multipoint

Frame Relay was to teach multipoint networking to upcoming engineers and we recently abandoned on the curriculum. Now it's back in MPLS-TP.

The post Response: RFC 7167 – A Framework for Point-to-Multipoint appeared first on EtherealMind.

Brocade Vyatta & Forwarding Performance on X86 Server

It's a constant and oft repeated fallacy that software on x86 servers will never forward packets at speed. Here is Vyatta explaining why their software will be able to go past 100 Million Packets Per Second this year on standard COTS hardware.

The post Brocade Vyatta & Forwarding Performance on X86 Server appeared first on EtherealMind.

Why Internet Standards are Still Important

Vidya Narayana, in a piece at Gigaom, said recently: So, why did I actually stop contributing to standards definitions? The primary one is the fact that while the pace at which standards are written hasn’t changed in many years, the pace at which the real world adopts software has become orders of magnitude faster. Standards, unfortunately, […]

Author information

Russ White

Principle Engineer at Ericsson

Amusing Junos commands….

This Junos command always makes me laugh – and I’ve never bothered to work out what it does:

  qualified-bum-pruning-mode  Enable BUM pruning for VPLS instance

No, Software Defined Networking will not Doom Engineers

No, Software Defined Networking will not Doom Engineers

by Brian Boyko, Technology Contributor - April 15, 2014

With the advent of SDN, there is a lot of speculation these days about the future of network engineers. An article in PCWorld written by Stephen Lawson of IDG News Service caught our eye a while back for doing an excellent job dissecting the situation:

“Will software-defined networking doom the command line interface?” “Will SDN spell doom for the tool that network engineers have used throughout their careers?” Lawson asks.

“If done properly, yes, it should kill the CLI. Which scares the living daylights out of the vast majority of CCIEs,” Gartner analyst Joe Skorupa said. “Certainly all of those who define their worth in their job as around the fact that they understand the most obscure Cisco CLI commands for configuring some corner-case BGP4 (Border Gateway Protocol 4) parameter.”

Now, Lawson did a great job of examining the question he set up. In our opinion though, the main issue is not with the CLI. Sure, command line interfaces were eventually replaced in many places with graphical user interfaces in the general history of computers. But CLIs have Continue reading

Deploying Datacenter MPLS/VPN on Junos

One of my recent projects has been deploying an MPLS/VPN architecture across a pair of smallish datacenters comprised entirely of Juniper gear. While I'm no stranger to MPLS/VPN, I am still a bit green to Junos, so it was a good learning exercise. My previous articles covering MPLS/VPN on Cisco IOS have been fairly popular, so I figured it would be worthwhile to cover a similar implementation in the Juniper world.

For our datacenters, we decided to implement a simple spine and leaf topology with a pair of core routers functioning as IBGP route reflectors and a pair of layer three ToR switches in each server rack. The spine is comprised of four layer three switches which run only MPLS and OSPF; they do not participate in BGP.

This article assume some basic familiarity with MPLS/VPN, so if you're new to the game, consider reading through these previous articles for some background before continuing:

Continue reading · 12 comments

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