One of my readers is struggling with the aftermath of marketing gimmicks:
We will be implementing a new network soon, and we're discussing P-routers versus regular routers versus switches. I'm looking for arguments to go one way or the other.
TL&DR: there’s no difference between router and L3 switch.
Read more ...Traffic visibility and control with sFlow (Peter Phaal, InMon)
sFlow instrumentation has been included in Open vSwitch since version 0.99.1 (released 25 Jan 2010). This talk will introduce the sFlow architecture and discuss how it differs from NetFlow/IPFIX, particularly in regards to delivering real-time flow analytics to an SDN controller. The talk will demonstrate that sFlow measurements from Open vSwitch are identical to sFlow measurements made in hardware on bare metal switches, providing unified, end-to-end, measurement across physical and virtual networks. Finally, Open vSwitch / Mininet will be used to demonstrate Continue reading
One way or another, all data center networks exhibit at least 6 different functional areas that their operators need to engineer, implement, and operate with a differing set of needs and requirements. Similarly, in one way or another, most of the available SDN and virtualized network solutions available today or in progress aim to deal with issues in one or more of these areas to improve their functional effectiveness, cost, automated-ness, or integrated-ness. Yet some areas receive an inordinate amount of focus/attention and those areas may not necessarily have the most opportunity for improvement. Let’s take a look at these 6 requirements in order of the opportunity value to bring new levels of effectiveness to data centers.
Edge switching loosely covers the function of providing switching between end points, whether they be virtual servers, physical servers, storage devices, or terminating services devices (load balancers, firewalls, etc.) It is important to note that in a virtualized server environment, there is typically 2 layers of edge – a set of virtual switches that connect together VMs and a set of physical switches that connect the physical hosts.
Much of the attention and Continue reading
The eternal loathing between Storage and Networking professionals has manifested into a podcast when I am joined by well known storage people to debate our dysfunctional family relationship.
The post Show 214 – Storage versus Networking appeared first on Packet Pushers Podcast and was written by Greg Ferro.
I’ve spent some hours taking a look at Docker containers and how they connect to the network. The short summary is “messy” and better description is “train wreck”. Chris Swan has a 30 minute presentation on his experiences with Docker as part of his company VNS3. Docker Networking | Chris Swan’s Weblog. At this point […]
The post Response: Docker Networking | Chris Swan’s Weblog appeared first on EtherealMind.
It’s ironic to end the 30 day challenge by not posting for a short while, but what can I say? I’ve been very busy! Today I’m traveling to Barcelona to attend the HP Discover 2014 Barcelona event as a guest of HP’s Independent Blogger Programme. It looks like HP will be keeping us busy while we’re there, so I would predict quite a few posts coming out of this trip in the near future and I’m looking forwarding to hearing more about what HP is up to.
In early October I posted about HP’s SDN Mojo and OpenFlow deployment at Interop after they presented to us as part of Tech Field Day Extra. In that post I was impressed that HP had moved from talk to action as regards OpenFlow. I wonder what else HP has up its sleeves?
Do take a moment to check out HP Discover Barcelona 2014 and look at the Content Catalog. If nothing else, check out the SDN sessions in the content catalog. Hopefully that link will take you directly to the right results; there are some interesting sessions on that topic alone.
Like other events, HP will also be streaming some content live for Continue reading
It’s ironic to end the 30 day challenge by not posting for a short while, but what can I say? I’ve been very busy! Today I’m traveling to Barcelona to attend the HP Discover 2014 Barcelona event as a guest … Continue reading
If you liked this post, please do click through to the source at Viva España – Heading to HP Discover and give me a share/like. Thank you!
ExtremeXOS is a network operating system used in Extreme Networks network switches. Virtualized version of ExtremeXOS - EXOS virtual machine vmdk image can be used to build virtual lab without need to use hardware switches. Although ExtremeXOS virtual machine can be downloaded for free only certain features are known to work. For this reason software should not be used for testing any actual networking setups or performance tests.
The tutorial consist of two parts. The part one explains how to configure Qemu emulator to run ExtremeXOS virtual machine. In part two, ExtremeXOS VM is connected to virtual lab run by GNS3 software. In this lab, features such as VLANs, 802.1q trunks and OSPF routing protocol are tested between multilayer switches from different vendors - Cisco, Arista and Extreme Networks.
Host Software and Hardware Requirements
Virtual Machines Software and Hardware Requirements
As servers get faster, network speed and latency is impacted by the performance of network adapters inside the server. There are many after market options for radically improving the throughput and latency performance and we discuss them in this 20 minute show.
The post PQ Show 37 – Fancy Network Adapters with Solarflare appeared first on Packet Pushers Podcast and was written by Greg Ferro.
brm
Just for reference, here’s the config a QFX5100 comes with out of the box.
Notes:
Initially the switch tries to get an IP address on the vme0 and irb interfaces so that it can do an auto-image-upgrade, but that failed in the lab since no server (nor the appropriate DHCP options) were available. The result was an irritating repeated message on the console about this. To get rid of that, “deactivate chassis auto-image-upgrade”. This is probably for use if the QFX switch is part of a Q-Fabric – presumably it is trying to upgrade itself over the management network to the version the rest of the QFabric is running.
All interfaces are in the default VLAN, even though their membership is not reflected in the config.
All interfaces have RSTP enabled.
Unfortunately all interfaces are listed twice if they’re dual-mode (i.e. SFP or SFP+). This makes the initial config very long. Obviously this can be deleted.
version 13.2X51-D20.2;
system {
host-name QFX5100-4;
arp {
aging-timer 5;
}
root-authentication {
encrypted-password "REMOVED"; ## SECRET-DATA
}
login {
user imtech {
uid 2000;
Continue reading
This week we are sponsored by Solarwinds NPM and topics: its Net Neutrality, Facebook's Data Centre Design, Resellers and SDN, Amazon tilts at the Enterprise, Project Squared, and Too Many Salesman.
The post Network Break 23 appeared first on Packet Pushers Podcast and was written by Greg Ferro.
Someone recently sent me this question:
Is it possible to prepend one IP address from a public IPv4 segment?
I don’t want to know what crazy stunt this engineer was forced to pull off, but just in case you land in a similar quandary here’s how you shoelace yourself out of it.
Read more ...Today, We wish and hope all of our friends and students have a very Happy Thanksgiving!
