Data science, AI/ML, and HPC have been influential in tackling complex issues like the coronavirus pandemic. …
Solving Society’s Big Problems Means Funding More Than Supercomputers was written by Tobias Mann at The Next Platform.
Gluware introduces a new Topology feature in its network automation platform. Gluware Topology maps the network using the Gluware model and engine to visualize the network. Benefits of the new capability include improved operations by showing what network devices are where, faster troubleshooting, and streamlining security and audit processes. Packet Pushers host Ethan Banks joins […]
The post Introducing Gluware Topology: Packet Pushers Gluware LiveStream, June 28, 2022 (4/7) – Video appeared first on Packet Pushers.
Today on the Tech Bytes podcast we look at how to get better visibility into the WAN. Our sponsor is Cisco ThousandEyes and we’re going to discuss its latest capability, called WAN Insights, that analyzes WAN performance data to help remove SD-WAN blind spots and give network engineers a better understanding of whether their providers are delivering as promised.
The post Tech Bytes: Forecasting SD-WAN Performance With WAN Insights (Sponsored) appeared first on Packet Pushers.
The hyperscalers and cloud builders are not the only ones having fun with the CXL protocol and its ability to create tiered, disaggregated, and composable main memory for systems. …
KAIST Shows Off DirectCXL Disaggregated Memory Prototype was written by Timothy Prickett Morgan at The Next Platform.
VMware HCX continues to evolve with the release of HCX 4.4 which includes several key enhancements in multiple different areas. These enhancements are going to address new requirements, stabilize the current feature set and provide additional security. This blog aims to highlight the major changes in HCX 4.4.
Transport AnalyticsFollowing the release of HCX 4.1, the HCX team undertook an effort to better understand how various aspects of a network underlay (including bandwidth, packet loss and latency conditions) affect migration outcomes. We called this effort the Network Underlay Characterization for HCX. During the 4.2 release, the characterization exercise enabled us to officially support services over VPN/SD-WAN, along with the Network Underlay minimum requirements to support any underlay agnostically. We also published detailed tech paper (See Network Underlay Requirements and HCX Performance Outcomes). This document guides the reader through the characterization exercise (manually using command line tooling). HCX 4.4 adds Transport Analytics the HCX, allowing the user to execute performance baselining for the HCX service transport on-demand and visualizes transport performance in real-time and as time-series graphs. This enables the migration administrator to understand the network underlay conditions reflected in the transport and plan Continue reading |
A crash in a development version of flowtrackd (the daemon that powers our Advanced TCP Protection) highlighted the fact that libxdp (and specifically the AF_XDP part) was not Linux network namespace aware.
This blogpost describes the debugging journey to find the bug, as well as a fix.
flowtrackd is a volumetric denial of service defense mechanism that sits in the Magic Transit customer’s data path and protects the network from complex randomized TCP floods. It does so by challenging TCP connection establishments and by verifying that TCP packets make sense in an ongoing flow.
It uses the Linux kernel AF_XDP feature to transfer packets from a network device in kernel space to a memory buffer in user space without going through the network stack. We use most of the helper functions of the C libbpf with the Rust bindings to interact with AF_XDP.
In our setup, both the ingress and the egress network interfaces are in different network namespaces. When a packet is determined to be valid (after a challenge or under some thresholds), it is forwarded to the second network interface.
For the rest of this post the network setup will be the following:
e.g. eyeball packets Continue reading
Hello my friend,
All of us (definitely me, at least) are always thrilled hearing news from network vendors on their implementation of model-driven interfaces for network management. Having spent years automating network devices in a text-based paradigm (i.e., from CLI-based automation to full fledged configuration rendering with a replacement), I’m a firm believer that model-driven approach based on YANG modules and protocols such as GNMI, NETCONF, and RESTCONF, is a proper way to go. Recently we disclosed the development we are doing in terms of network topology visualization with DANT. And today we’d like to share lessons learned based on that experience.
We planned to write this blogpost for a few weeks if not months, but due to various reasons it was delayed. We are delighted to finally post it, so that you can get some useful ideas how you can build your own CI/CD pipeline with GitHub, probably the most popular platform for collaborative software development.
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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 Continue reading
What is FRR? a. License based AWS internal routing platform b. Only supports static routing and IPSEC vpn c. Open-source internet routing protocol suite for *nix platforms d. Support BGP along with ISIS,OSPF networking protocols Answer is at the end of the post, feel free to skip it, I just did not want to make a spoiler residing just below the question
Before I write anything on implementation, I can vouch for FRR stability. It’s an open source internet routing protocol suite and used by many organisations on bare-metal and cloud instances as well, its very stable and
Simply put, FRR can make your bare metal or a cloud instance a routing platform to connect various networks together. The reason why we explore this is that this setup builds onto other posts on how AWS interacts with various routing platforms hosted from on-premises and to show the possibility if someone is considering FRR as an alternative.
Setup is extremely simple but there is one caveat which consumed almost a day for me to figure out and at last it was an answer to a known problem. FRR builds on Quagga which provided Continue reading
MEDIUM: <https://raaki-88.medium.com/traffic-mirroring-interesting-one-aws-advanced-networking-a7e41027c75>
What is Traffic Mirroring ? a. Used for Content Inspection,Threat Monitoring,Troubleshooting b. Can only be implemented with a Load Balancer c. Needs Elastic Fabric Adapter d. Flow logs capture mirrored traffic Answer is at the end of the post, feel free to skip it, I just did not want to make a spoiler residing just below the question
Traffic Mirroring is an awesome concept which can now be implemented with an AWS VPC. You can mirror the traffic and send packets to a EC2 instance or specific appliances for further processing.
*So when a packet gets mirrored it gets VXLAN encapsulated, end host/appliance should be able to decapsulate VXLAN header( we will see a PCAP ).
* Two encapsulations – outer GENEVE(from LB if used) and inner VX-LAN
* Source (which should be monitored — Network Interface)
*Target (Destination of mirrored Traffic)
*Filter (What traffic types should be Continue reading
Network engineers need to make a business case to get an automation project off the ground, and it needs to describe the benefits and value in language that non-techincal executives can understand. This video offers tips and a simple blueprint to help engineers make the case to CIOs. Host Drew Conry-Murray from the Packet Pushers […]
The post Getting Your CIO to Say Yes to Automation: Gluware LiveStream June 28, 2022 (3/7) – Video appeared first on Packet Pushers.
A long time ago, when we first started The Next Platform, Urs Hölzle, then senior vice president of the Technical Infrastructure team at Google, told us that to gain a 20 percent improvement in price/performance it would absolutely change from the X86 architecture to Power architecture – or indeed any other architecture – and even for one generation of machines. …
Google Follows Suit With Microsoft On Ampere Arm Instances was written by Timothy Prickett Morgan at The Next Platform.