VMware NSX: a short introduction and HOWTO install it
NSX is the SDN solution by VMware. NSX is available as: NSX for vSphere (NSX-V) NSX Multi-Hypervisor (NSX-MH) NSX-MH is NSX for Multi Hypervisors (ESXi, KVM, Xen, Hyper-V). This post is focused on NSX-V. Acronyms DFW: Distributed FireWall DLR: Distributed Logical Router LIF: Logical InterFace UWA: User World Agent VDS: VSphere Distributed Switch VIB: VSphere Installation Bundle VNID: VXLAN […]Switching is not working on VMware NSX
In this scenario we have three VMs deployed on a NSX vSwitch with VNI 5002. Two are running on the same hosts and they can ping each other, the other one is running on a separated host and cannot ping the other VMs. Check if at least one interface is configured for VXLAN: ~ # […]PQ Show 41 – HP Networking’s Sarwar Raza on the Meaning of Open
This sponsored podcast is a continuation of our series recorded at HP Discover Barcelona 2014. Our thanks to Chris Young for organizing the topics and guests. The interesting conversations in Barcelona at HP Discover 2014 continued with a chat about the shifty meaning of “open.” In the world of technology, being open means a lot of different […]
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The post PQ Show 41 – HP Networking’s Sarwar Raza on the Meaning of Open appeared first on Packet Pushers Podcast and was written by Ethan Banks.
BGPSEC: Leaks and Leaks
This is the final post in my series on BGPSEC — I will probably follow this up, at some point, with a couple of posts on some alternatives to BGPSEC, and the larger issue of the evolution of BGP. Basic Operation Protections Offered Replays, Timers, and Performance Signatures and Performance In this final post, I […]
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The post BGPSEC: Leaks and Leaks appeared first on Packet Pushers Podcast and was written by Russ White.
Network Programmability and SDN
What’s the difference between network programmability and SDN? Matt Oswalt explained his view on the topic in the Network Programmability 101 webinar.
Taming Netlink
Netlink is a Linux Kernel interface that is used to talk Networking between Kernel processes, or from userland to Kernel processes. This post documents how I tamed Netlink and make working with it in Golang easier.
If you want to create an interface, set an MTU, set an IP address etc... on a Linux machine then you have to talk Netlink to do it. For Golang, there are a number of libraries, but this one seems to be gaining a lot of traction recently. Honorable mentions go to Tenus and Docker's libcontainer.
Now, this library is good, but it isn't complete and some of the behavior I need is missing. So how does one go about implementing it you might ask?
Here's my process:
1. Browse the iproute2 source code
The iproute2 utility is insanely useful - it replaces ifconfig and route for those with memories long enough.
In my case, the feature I wanted was here and I could take a look at the exact message structure required :)
2. Debugging Netlink
Once I'd written my tests and code, I wasn't surprised to see that things were not working.
strace will get you part of the way, but it's Continue reading
Taming Netlink
Netlink is a Linux Kernel interface that is used to talk Networking between Kernel processes, or from userland to Kernel processes. This post documents how I tamed Netlink and make working with it in Golang easier.
If you want to create an interface, set an MTU, set an IP address …
Taming Netlink
Netlink is a Linux Kernel interface that is used to talk Networking between Kernel processes, or from userland to Kernel processes. This post documents how I tamed Netlink and make working with it in Golang easier.
phpipam MySQL database optimizations
MySQLtuner instructions to optimize MySQL database for phpipam.Unique RD per PE in MPLS VPN for Load Sharing and Faster Convergence
This post describes how load sharing and faster convergence in MPLS VPNs is possible by using an unique RD per VRF per PE. It assumes you are already familiar with MPLS but here is a quick recap.
The Route Distinguisher (RD) is used in MPLS VPNs to create unique routes. With IPv4, an IP address is 32 bits long but several customers may and probably will use the same networks. If CustomerA uses 10.0.0.0/24 and CustomerX also uses 10.0.0.0/24, we must in some way make this route unique to transport it over MPBGP. The RD does exactly this by prepending a 64 bit value and together with the IPv4 address, creating a 96-bit VPNv4 prefix. This is all the RD does, it has nothing to do with the VPN in itself. It is common to create RD consisting of AS_number:VPN_identifier so that a VPN has the same RD on all PEs where it exists.
The Route Target (RT) is what defines the VPN, which routes are imported to the VPN and the topology of the VPN. These are extended communities that are tagged on to the BGP Update and transported over MPBGP.
MPLS uses Continue reading
Setting Up Untangle NGFW in a GNS3 Environment.
Building on the premise set up in Lab Blueprint for CEH Aspirants or something gutsy to do on GNS3 !!. Let me introduce you to ( if you areHeadwinds, or Uphill?
As some of my readers know, I’ve done a fair bit of bike touring. Two of the challenges of bike touring are riding uphill, and riding into headwinds.
Riding uphill is tough. 2,300m passes in snow, or 3,200m passes in sunshine, it’s tough going. But you put your head down, and keep turning the pedals, because you know that eventually you will reach the top, and there will be a downhill reward.
Riding into headwinds is a different story. You can battle into headwinds for days, and never get any reward. It saps your energy, and you don’t know if or when it will ever end. The wind could just keep coming from that direction. I’ve gone to different countries just to avoid the wind in the past.
They’re both hard. But one of them has an end, and a reward. The other one can just keep on sucking away your will to live.
Applying it to Life
This applies to the rest of your life. The tricky bit is that sometimes you don’t know if you’re going uphill, or into the wind. Both of them feel hard, and you can’t always see the end in sight.
ASA Discussion
Hello Everyone, There seems to be four major issues among the community. One of them is the ASA. I put together a brief discussionRaspberry Pi RSPAN Capture Box
For some time I have had issues while doing captures such as finding the elusive “spare laptop” you can use, multiple trips out to the site to pick up the captures, or finding another NIC to put in there so you can connect remotely and copy the captures over the network, taking up 2 switch […]
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The post Raspberry Pi RSPAN Capture Box appeared first on Packet Pushers Podcast and was written by Daniel Himes.
I became CCIE# 46173
How does Internet work - We know what is networking
This is the story on how I became CCIE# 46173 To be honest, when I look back, I do not really know the main reason behind going through all this trouble, but I can tell you the story about how I did it. It’s mostly a thriller, and some drama towards the end. I will give you an overview of the whole process including the materials used, videos watched, books read and struggles that I went through. I think that is the right thing to do. This article is for all of you out there who are still trying to study for this exam and need some suggestions.
Pick a Topic for NSX Deep Dive Software Gone Wild Episode
Dmitri Kalintsev, one of the networking guys from VMware NSX team, has kindly agreed to do an NSX technical deep dive Software Gone Wild episode… and you have the opportunity to tell him what you’d like to hear. It’s as easy as writing a comment, and we’ll pick one of the most popular topics.
Do keep in mind that we plan to do a technical deep dive, and it has to fit within an hour or so or nobody will ever listen to it, so please keep your suggestions focused. “Troubleshooting NSX”, “NSX Design”, or “NSX versus ACI ” is not what we’re looking for ;)
Network Field Day 9
I had a fantastic time at Network Field Day 8, and now I’ve been lucky enough to be invited back to NFD9 this February.
As usual, the Tech Field Day crew have put together a great mix of vendors. I particularly like the look of the SDN WAN-focused vendors, such as VeloCloud and cloudgenix. Much of the early SDN focus has been on the DC use-case, but that has limited applicability in my local market. SDN WAN solutions definitely apply to the New Zealand market though. I can think of several organisations where I’d love to have better WAN options today.
I’m also very happy to see Cumulus Networks making a first appearance. I’ve done a lot of Linux work during my career, and there’s many times I would have loved to have all the capabilities of a GNU/Linux environment on a switch. I think they will have a huge influence on how Network OSes are delivered in future.
Network Management has always been a large part of my career too, so I’m looking forward to hearing updates from SolarWinds, and to find out more about NetBeez.
There’s some old faces and new attending. I’m looking forward to meeting people who I’ve Continue reading
Show 220 – OpenFlow + Table Type Patterns with Curt Beckmann
Curt Beckmann, CTO for EMEA at Brocade, joins Packet Pushers Ethan Banks & Greg Ferro for an update of what’s been going on with the Forwarding Abstractions Working Group (FAWG) at the Open Networking Foundation (ONF). We get into a discussion of emerging Table Type Patterns within OpenFlow (OF), a way for OF switches and OF […]
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The post Show 220 – OpenFlow + Table Type Patterns with Curt Beckmann appeared first on Packet Pushers Podcast and was written by Ethan Banks.
On-going BGP Hijack Targets Palestinian ISP
It’s a new year, but some things never change. In the past few days we have observed a spate of incidents of routing misbehavior including two man-in-the-middle routing hijacks conducted in the past couple of days by A2B Internet out of the Netherlands.
Beginning at 00:33:44 UTC on Thursday, 8 January, we began observing a routing hijack of IP address space normally announced by Mada Telecom (AS51047), a Palestinian ISP with presence in both Gaza and the West Bank. Beginning at that time, A2B Internet B.V. (AS51088) began announcing 46.244.81.0/24, which is a more-specific route of 46.244.80.0/23, normally announced by Mada.
Traceroutes directed to this address space are presently being re-directed to A2B Internet’s network in the Netherlands before continuing on to Palestine. For example:
trace from Cyberjava, Malaysia to Mada Telecom, PS on Jan 09, 2015
1 *
2 x.x.x.x (Cyberjaya, Malaysia) 3.442
3 113.23.163.57 (Extreme Broadband, Malaysia) 0.696
4 113.23.190.109 (Extreme Broadband, Malaysia) 1.222
5 218.189.12.101 global.hgc.com.hk 35.854
6 218.189.8.102 global.hgc.com.hk 36.742
7 118.143.224.243 (Hutchison, Singapore) 41.628
8 218.189.8.142 (Hutchison, Amsterdam) 190.787
9 195.219.150.6 (Tata, Amsterdam, NL) 213.494
10 46.244.0.4 (A2B Internet, NL) 200.990
11 141.136.97.5 (GTT, Amsterdam) 268.366
12 4.68.70.97 xe-5-0-1.edge3.Amsterdam.Level3.net 300.909
13 4. Continue readingiPexpert’s Newest “CCIE Wall of Fame” Additions 1/09/2015
Please Join us in congratulating the following iPexpert client who has passed his CCIE lab!
This Week’s CCIE Success Stories
- Srikanth Navuluri, CCIE #45896 (Routing & Switching)
- Rodrick Burke, CCIE #46154 (Wireless)
- Bradley Lierman, CCIE #46093 (Collaboration)
- Lee Ramirez, CCIE #46113 (Wireless)
We Want to Hear From You!
Have you passed your CCIE lab exam and used any of iPexpert’s self-study products, or attended a CCIE Bootcamp? If so, we’d like to add you to our CCIE Wall of Fame!