HTTP/2 Server Push with multiple assets per Link header
In April we announced that we had added experimental support for HTTP/2 Server Push to all CloudFlare web sites. We did this so that our customers could iterate on this new functionality.
CC BY 2.0 image by https://www.flickr.com/photos/mryipyop/
Our implementation of Server Push made use of the HTTP Link header as detailed in W3C Preload Working Draft.
We also showed how to make Server Push work from within PHP code and many people started testing and using this feature.
However, there was a serious restriction in our initial version: it was not possible to specify more than one asset per Link header for Server Push and many CMS and web development platforms would not allow multiple Link headers.
We have now addressed that problem and it is possible to request that multiple assets be pushed in a single Link header. This change is live and was used to push assets in this blog post to your browser if your browser supports HTTP/2.
When CloudFlare reads a Link header sent by an origin web server it will remove assets that it pushes from the Link header passed on to the web browser. That made it a little difficult Continue reading
Forgotten ‘maintenance’ password for Junos Space
The maintenance users password can be reset in Junos Space if you still have access via the CLI:
- SSH to the Space host
- Log in as the admin user
- Choose the debug option on the menu (6 or 7, depending on whether this is a VM or an appliance). Just press the number, not the number followed by return!
- Put in the admin user’s password again. You’re now in the Centos shell.
- Issue the command ‘htpasswd -sb /var/www/maintenance/maintPW maintenance <newpassword>‘
Simple as that… I was never sure why an additional maintenance password was required as well as the admin user and the GUI super user password. Makes it a pain to keep a record of, but there you go – presumably there’s a good reason.
WiFi Startup Promises Fresh Approach To The WLAN
Mist combines cloud-managed WiFi, analytics, SDN, and beacon-less location-based services.
How IPv6 Enables The Connected Home
IPv6 is ushering in the next-generation of home networking by providing seamless IoT connectivity.
Node Africa Deploys Greenfield Data Center Infrastructure, Leads Africa to be Cloud First Continent
Node Africa is a cloud service provider and cloud broker. One of very few hybrid to public cloud providers in Africa, it offers its customers bespoke cloud infrastructure and services including consulting, design, build, and deployment of complex solutions. When the organization launched in Kenya, their challenges included deploying a data center in under two months, and creating a hybrid offering that would reduce bandwidth challenges.
Because of cost constraints, Node Africa chose VMware and the vCloud Air Network program (vCAN) to build its business and data center, so that they would only pay for what they used. Then, using the vCloud Architecture Toolkit—including vSphere, vCloud Director, and NSX—they built a scalable cloud infrastructure in six weeks.
Node Africa CEO Phares Kariuki says, “The amount of money we have saved on networking equipment as a result of using NSX as the basis of our network has been amazing. We saved $10,000 on just our initial network infrastructure investment, that’s big for a green fields start-up.”
Read the complete case study here.
Roger
The post Node Africa Deploys Greenfield Data Center Infrastructure, Leads Africa to be Cloud First Continent appeared first on The Network Virtualization Blog.
Nokia Virtualizes Diameter Signaling for Traffic Control
It's being used by a Tier 1 telco.
Technology Short Take #68
Welcome to Technology Short Take #68, my erratically-published collection of links, articles, and posts from around the web—all focused on today’s major data center technologies. I’ve been trying to stick to a schedule that has these posts published on a Friday, but given the pending holiday weekend I wanted to get this out a bit early. As always, I hope that something I’ve included here proves useful to you.
Networking
- Brent Salisbury retweeted a ton of MACVLAN- and IPVLAN-related posts right after I published the last Technology Short Take, so they had to get bumped to this one. First, we have this post on HiCube, which covers MACVLAN vs. IPVLAN. Next, we have a pair of articles by Sreenivas Makam; the first covers MACVLAN and IPVLAN basics, while the second tackles the Docker MACVLAN and IPVLAN network plugins. Both articles are useful, IMHO, especially considering that MACVLAN is no longer experimental as of the Docker 1.12 release.
- I recently came across this mention of in-band network telemetry (INT), which looks really powerful. I think this will be something worth watching.
- Oh, and while we’re discussing P4: Diego Dompe has an article talking about OpenSwitch and P4 that Continue reading
Configuring OpenSwitch
The following configuration enables sFlow monitoring of all interfaces on a white box switch running the OpenSwitch operating system, sampling packets at 1-in-4096, polling counters every 20 seconds and sending the sFlow to an analyzer (10.0.0.50) on UDP port 6343 (the default sFlow port):switch(config)# sflow collector 10.0.0.50A previous posting discussed the selection of sampling rates. Additional information can be found in the OpenSwitch sFlow User Guide.
switch(config)# sflow sampling 4096
switch(config)# sflow polling 20
switch(config)# sflow enable
See Trying out sFlow for suggestions on getting started with sFlow monitoring and reporting.
Changing the World, The Era of Hyper-Converged
Today, many of us still build our infrastructures like we have always done throughout our careers. We have become masters...Datanauts 040: Hands-On Learning Series – CoreOS & AppVeyor
Todays Datanauts show is all about learning new technologies. Ethan and Chris have each spent time digging into a technology thats unfamiliar to them: building a DNS service using CoreOS for Ethan, and using AppVeyor to built a test environment for PowerShell scripts for Chris. The post Datanauts 040: Hands-On Learning Series – CoreOS & AppVeyor appeared first on Packet Pushers.
