Journey Through Open Networking
Arista has a decade long history of collaboration in open networking. We have pushed the envelope, co-developed open platforms and deployed them to build the world’s largest cloud -scale networks.
Feedback: How Networks Really Work
In early April 2020 I ran another live session in my How Networks Really Work webinar. It was supposed to be an easy one, explaining the concepts of packet forwarding and routing protocols… but of course I decided to cover most solutions we’ve encountered in the last 50 years, ranging from Virtual Circuits and Source Route Bridging to Segment Routing (which, when you think about it, is just slightly better SRB over IPv6), so I never got to routing protocols.
That webinar was supposed to be an introductory one, but of course I got pulled down all sorts of rabbit trails, and even as I was explaining interesting stuff I realized a beginner would have a really hard time following along… but then I silently gave up. Obviously I’m not meant to create introduction-to-something material.
Kernel of Truth season 3 episode 6: Building modern campus networks
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In this episode we talk about trends, architectures and technologies for building modern Campus networks. Joining Kernel of Truth podcast hosts Brian O’Sullivan and Roopa Prabhu are two of our senior consultants, Eric Pulvino and David Marshall, who know what they’re talking about because they are in the field working with customers building these networks. They share their first hand knowledge here so be sure to take a listen!
Guest Bios
Brian O’Sullivan: Brian currently heads Product Management for Cumulus Linux. For 15 or so years he’s held software Product Management positions at Juniper Networks as well as other smaller companies. Once he saw the change that was happening in the networking space, he decided to join Cumulus Networks to be a part of the open networking innovation. When not working, Brian is a voracious reader and has held a variety of jobs, including bartending in three countries and working as an extra in a German soap opera. You can find him on Twitter at @bosullivan00.
Roopa Prabhu: Roopa Prabhu is Chief Linux Architect at Cumulus Networks. Continue reading
Tech Bytes: Accelerating Cloud Connectivity With Megaport (Sponsored)
Megaport provides global cloud connectivity, data center interconnect, and Internet exchange peering. On today's sponsored Tech Bytes podcast, we talk about the services Megaport offers, and how the company can support your remote-work needs. Our guest is Misha Cetrone, Sr. Global Director, Cloud Solutions.Tech Bytes: Accelerating Cloud Connectivity With Megaport (Sponsored)
Megaport provides global cloud connectivity, data center interconnect, and Internet exchange peering. On today's sponsored Tech Bytes podcast, we talk about the services Megaport offers, and how the company can support your remote-work needs. Our guest is Misha Cetrone, Sr. Global Director, Cloud Solutions.
The post Tech Bytes: Accelerating Cloud Connectivity With Megaport (Sponsored) appeared first on Packet Pushers.
Network Break 283: NVIDIA Acquires Cumulus Networks; Innovium Announces 25.6 Tbps Switch ASIC
Today's Network Break analyzes NVIDIA's purchase of Cumulus Networks, boggles at Innovium's announced 25.6Tbps ASIC, and parses why Arista will support the SONiC network OS on its switches. We also cover a new 5G lobbying organization, Zoom's Keybase acquisition, financial results, and more tech news.
The post Network Break 283: NVIDIA Acquires Cumulus Networks; Innovium Announces 25.6 Tbps Switch ASIC appeared first on Packet Pushers.
Network Break 283: NVIDIA Acquires Cumulus Networks; Innovium Announces 25.6 Tbps Switch ASIC
Today's Network Break analyzes NVIDIA's purchase of Cumulus Networks, boggles at Innovium's announced 25.6Tbps ASIC, and parses why Arista will support the SONiC network OS on its switches. We also cover a new 5G lobbying organization, Zoom's Keybase acquisition, financial results, and more tech news.Daily Roundup: Ericsson Says Pandemic to Drive 5G
Ericsson anticipates the pandemic to drive 5G; McAfee, CrowdStrike, Palo Alto Networks tracked...
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SONiC and White Box switches in the Enterprise DC! – Part 1
In recent years two buzz words began to arise: open-networking and white box switches. Those two words go often hand-in-hand with each other. They are often promoted by big names like Facebook or Microsoft.
From the software side, SONiC is maybe the biggest player out there as it powers Microsoft Azure’s cloud, while from the hardware side, Accton has arguably been one of the most important vendors.
The truth though, at least in my opinion, is that while this innovation is great it is not ready to be embraced by everyone yet. Only companies willing to make this “leap of faith” can take advantage of all of this, but what about us poor mortals? Are SONiC and white boxes ready to be widely deployed? Well let’s give it a look!
We will be deploying a simple VXLAN-EVPN Fabric like in the picture below and we will be checking how difficult is to configure and troubleshoot the fabric, but also and most importantly if this common Enterprise design actually works.
The Hardware
For our spines we’ll be using Edge-Core’s AS7816-64X, powered by Broadcom’s Tomahawk II chipset. This switch is a 2RU lean spine providing 64x 40/100 Gbps QSF28 ports.
For Continue reading
Geo-Distributed Packet Broker Services with Pluribus Adaptive Monitoring Fabric
Any Tap, Any Tool, Anywhere Introduction As applications and workloads become more distributed across data centers, edge locations and public...McAfee, CrowdStrike, Palo Alto Networks Track Evolving COVID-19 Cyberattacks
Three reports show cyberattacks continue to mutate along with the COVID-19 pandemic, and they...
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Ericsson Pins 5G Gains on Pandemic
The Swedish vendor raised its prediction for 5G subscriptions from 2.6 billion to 2.8 billion by...
© SDxCentral, LLC. Use of this feed is limited to personal, non-commercial use and is governed by SDxCentral's Terms of Use (https://www.sdxcentral.com/legal/terms-of-service/). Publishing this feed for public or commercial use and/or misrepresentation by a third party is prohibited.
The Week in Internet News: Hackers Revamp Malware With COVID-19 Messages
Taking advantage: Cyberattackers are reconfiguring the Remcos trojan, which allows them full access to victims’ computers, to include COVID-19 warnings in spam and phishing emails, Security Boulevard reports. “With the economy directly affected by the pandemic, people pay more attention to emails pretending to offer solutions, loans and other types of financial support. Another effective approach is to scare people with threats of account closures or company furloughs.”
The impact of a shutdown: An ongoing phone and Internet service shutdown in the Kashmir region is hurting the ability to distribute information and supplies during the COVID-19 pandemic, Greater Kashmir says. “People in need of essentials used to reach out to us on our helplines which have turned defunct,” said the chairman of an aid agency. “We used to make phone calls to our existing 750 beneficiaries for conveying them about timings to pick up their quota of essentials. But suspension of mobile networks has disturbed this entire process.”
Cooperative Internet service: The Christian Science Monitor has a story about small rural cooperatives building their own Internet services. Cooperatives, which are private businesses owned by customers, are common in parts of the U.S. Midwest, some providing electricity and Continue reading
Innovium Unveils ‘First’ 25.6 Tb/s Programmable Switch Chips
The company also claims the new Teralynx 8 platform is the first generation of switch silicon to...
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GNMI. Part 1. Intro to Protobuf.
Hello my friend,
Some time ago we have covered in-depth OpenConfig with NETCONF configuration as well as the OpenConfig telemetry with NETCONF. Today we want to make a next step and start discussion about another approach to manage the network elements in a programmatic way, which is gNMI.
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retrieval system, or transmitted in any form or by any
means, electronic, mechanical or photocopying, recording,
or otherwise, for commercial purposes without the
prior permission of the author.
Network automation training – self-paced and live online
Following your asks we open a new format for the network automation training – self-paced format:
- It doesn’t matter what your timezone is.
- It doesn’t matter how much hours weekly do you have to study.
- It doesn’t matter how solid is your current background in automation, scripting and software development.
You decide on your own when, how often and how quickly you can learn.
However, if you want to join groups, that is something we are happy to offer you as well.
At this training we teach you all the necessary concepts such as YANG data modelling, working with JSON/YAML/XML Continue reading
What If… There Would Be an Easy Way to Run Your Network
Imagine a life where you would be able to…
- Find all interfaces that have VRRP configured but no useful VRRP neighbor;
- Find all OSPF adjacencies that should be up but are not;
- Get an alert every time the default IP route is lost;
- Find all MTU mismatches in your network;
- List all VXLAN-to-VLAN mappings across your data center, and find if two different VLANs map into the same VXLAN VNI;
- Compare IP routes in your data center to those you had yesterday;
- Verify that IP routing tables on all spine switches contain the same prefixes;
- Do the same comparison before and after a software upgrade;
- Identify changes in IP routing tables or ARP tables that happened between yesterday evening and this morning;
… and be able to do all that in a multi-vendor environment without writing tons of Ansible playbooks or Python code.
Juniper Default ARP Policer
Juniper devices have a default ARP policer that drops ARP requests and responses over 150kbps. By default, this is an aggregate policer that applies to all interfaces. This can lead to unexpected behavior when high levels of ARP on one interface lead to BGP session drops on another interface. You can’t change the default policer limits, but you can create a new policer, with higher limits.
Problem: IPv4 BGP Session Flaps on PNI
I was investigating a problem reported by one of our Transit providers. Once a day or so, our IPv4 BGP session with them would flap. The interface itself was stable, and the IPv6 session remained up. One particular site was seeing this more than others. The sites used different platforms, but were running the same code version.
The curious thing was the logs - we saw log messages saying that we had a notification message saying NOTIFICATION received from 192.0.2.188 (External AS 64498): code 4 (Hold Timer Expired Error). The syslog included this hold timer 30s, hold timer remain 0s, last sent 2s. So our router thought it was sending regular KEEPALIVE messages, but the remote end thought it had missed too many.
Looking Continue reading