Kentik

APRIL 4, 2023

More than anything, reliability becomes the principal challenge for network engineers working in and with the cloud. Even the most detailed reliability engineering can be easily undermined in an insecure network. While there is much to be said about cloud costs and performance , I want to focus this article primarily on reliability.

Cloud 104

Cloud Network Networking Bandwidth 104

Kentik

APRIL 25, 2016

Here at Kentik, we’ve applied many of the same concepts to Kentik Data Engine™ (KDE), a datastore optimized for querying IP flow records (NetFlow v5/9, sFlow, IPFIX) and related network data (GeoIP, BGP, SNMP). In this series, we’ll take a tour of KDE and also quantify some of its performance and scale characteristics.

Engineering 40

Engineering Routers Protocol IP Address 40

Kentik

FEBRUARY 8, 2023

With traffic telemetry, engineers can gain real-time visibility into traffic patterns, correlate events, and make predictions of future traffic patterns. Port mirroring Another method for gathering traffic telemetry is port mirroring, which replicates (mirrors) the network traffic on a switch or router to a monitoring device.

Network 111

Network Networking Port IP Address 111

Network Engineering

FEBRUARY 8, 2019

I understand address resolution protocol, etc. For instance, I'd like to discover the MAC address of the nearest switch on the far side of a router. I understand the difference between layer2 & layer3 and MAC & IP. But is there any way to do a traceroute that will show Layer 2 information?

Routers 52

Routers Protocol 52

Kentik

OCTOBER 12, 2021

The Internet Engineering Task Force (IETF) is also working toward changes that will impact pervasive monitoring. Fifteen years ago, NetOps could start up a packet analyzer and see all kinds of different unencrypted protocols such as FTP, SMTP, POP3, HTTP, DNS, etc. These protocols helped the NPM identify applications.

Encryption 84

Encryption DNS IP Address Protocol 84

Network Engineering

NOVEMBER 24, 2022

Mater RE (RE1) can't show any command invoke-on backup RE (RE0), for example: show version invoke-on all-routing-engines. master} nms@MX960> request routing-engine login other-routing-engine connect to address 128.0.0.4: master} nms@MX960> request routing-engine login other-routing-engine connect to address 128.0.0.4:

Engineering 52

Engineering Routers Port MPLS 52

Kentik

JANUARY 13, 2021

Despite your best efforts as a network engineer, network failures happen, and you have to fix them. No network engineer can troubleshoot without being prepared with their tools and telemetry. Send these pings using the Internet Control Message Protocol (ICMP) or TCP to one or any of the devices you believe to be involved.

Network 114

Network Networking TCP Protocol 114

Network Engineering

MARCH 17, 2019

However in my case , we have two routers that are directly connected using Bundle Link (AE Link) that has 2 x 10G member Links. Now each router should have interface metric of 50. Both are MX960 series routers. 30; } family mpls; } R2> show configuration protocols isis interface ae16.3 IS-IS is running between them.

Protocol 52

Protocol Bandwidth Routers MPLS 52

Kentik

FEBRUARY 13, 2017

What does a top-notch engineering team do for fun? At a recent on-site in our San Francisco headquarters, Kentik engineers both local and remote came together to confer on work in progress, discuss technical topics, and plan for the year ahead. We had two engineers who created nice visualizations utilizing data from our API.

Routers 40

Routers DNS Protocol Engineering 40

Kentik

APRIL 18, 2016

While NetFlow v9 and it’s follow-on protocol IPFIX offer tremendous flexibility there are some tradeoffs including complexity of implementation and the fact that a template must be received before the underlying flow data records can be correctly understood. The sFlow difference.

Protocol 40

Protocol Routers Encryption IP Address 40

Kentik

JANUARY 29, 2020

SNMP data is also used by network engineers to troubleshoot reported problems along with network architects to do things like capacity planning. The flow analytics are used to make decisions on how traffic is being sent or received to other internet-connected peers via traffic engineering and optimization. When is SNMP Used?

Port 16

Port Network Networking Data Centers 16

Kentik

JANUARY 29, 2020

SNMP data is also used by network engineers to troubleshoot reported problems along with network architects to do things like capacity planning. The flow analytics are used to make decisions on how traffic is being sent or received to other internet-connected peers via traffic engineering and optimization. When is SNMP Used?

Port 78

Port Network Networking Data Centers 78

Kentik

APRIL 24, 2017

Comparing flow protocols for real-world large-scale networks. A lot of ink has been spilled over the years on the topic of flow protocols, specifically how they work and their relative accuracy. One of the things that can be rather confusing is that there are a lot of different flow protocol names.

Protocol 40

Protocol Routers Bandwidth Internet 40

Network Engineering

DECEMBER 11, 2023

We have a block of static IPs facing the public, and have to have a router which points all the traffic to our router/gateway which points all the traffic to the ISP. Right now, all traffic has a static rule to send all traffic to the ISP gateway on the router at the edge going to the hand off. network subnet 10.113.0.0

VPN 52

VPN Port Protocol WAN 52

Kentik

APRIL 16, 2023

CTOs and other umbrella decision-makers recognize that software and network engineers must work together to deliver secure and performant applications. Observability and its SRE (site reliability engineer) champions have risen in demand as applications have evolved into these deeply distributed architectures.

Application 64

Application DevOps Network Networking 64

Kentik

JUNE 7, 2023

Advanced analysis : With Kentik’s powerful analytics engine, you can perform an in-depth analysis of flow logs from any cloud. In addition, the map visualizes Dedicated Interconnect attachments, VM interfaces, and VPN gateways with their associated on-prem and cloud routers.

Cloud 97

Cloud Gateway Port IP Address 97

Engineering at Meta

NOVEMBER 21, 2022

Meta is deploying a timing protocol, Precision Time Protocol (PTP) , that will offer new levels of accuracy and precision to our networks and data centers. Meta is deploying a network timing protocol, Precision Time Protocol (PTP) , to improve the accuracy and precision across our networks as well as in many use cases.

Data Centers 53

Data Centers Server Network Networking 53

Kentik

MARCH 7, 2016

But while these protocols have been around for a couple of decades, their potential utility to network operators was initially unrealized, and the process of exposing more value has been a long, gradual evolution. By 1994 BGP4 had become the settled protocol for inter-AS routing. In the beginning…. Kick AS and take names.

Protocol 40

Protocol Server Internet Engineering 40

Kentik

JULY 20, 2018

NetFlow is a protocol that was originally developed by Cisco to help network operators gain a better understanding of their network traffic conditions. Juniper MX and PTX series routers (via IPFIX). Alcatel-Lucent routers. Huawei routers. Cisco Catalyst switches. Enterasys switches. Flowmon probes. Linux devices.

Routers 40

Routers IP Address Protocol Server 40

Kentik

MARCH 13, 2019

For example, during an attack, service provider network engineers need to be skilled at finding attacks, choosing an appropriate mitigation strategy, and have proper access to the infrastructure to apply it. IP Protocol. It’s now much easier to propagate filters to all edge routers in large networks. Destination Prefix.

IP Address 49

IP Address Port Routers DNS 49

Kentik

APRIL 3, 2023

For example, to determine latency using traffic generated from probes or by analyzing packets, that traffic would likely pass through routers, firewalls, security appliances, load balancers, etc. Second, in a busy network, devices such as routers, switches, and firewalls may be very busy operating at a relatively high CPU.

TCP 110

TCP Application Virtual machine Network 110

Confluent

JUNE 26, 2019

So you wouldn’t apply DDD to, say, infrastructure software or building routers, proxies, or caching layers, but instead to business software that solves real-world business problems. From a technology perspective, this could include different APIs, frameworks, communication protocols, and datastores. There is no centralized logic.

Application 109

Application Protocol PaaS Blockchain 109

Kentik

JULY 10, 2018

Performance metrics and other types of monitoring data can be collected in real time using streaming telemetry protocols such as gRPC. Highly scalable Kafka clusters that utilize a publish/subscribe model are a commonly deployed pipeline solution, supplying telemetry data to multiple consumer analytics engines and tools.

Cloud 45

Cloud Digital Transformation Data Centers Application 45

CATO Networks

JANUARY 17, 2018

The University of Pennsylvania, for example, uses network scanning in the study of global trends in protocol security. Attackers may try to gain control of IoT devices or routers, control them using a bot that may be used later for DDoS attacks (such as the Mirai botnet ) or even cryptocurrencies mining, which are very popular these days.

Network 52

Network Networking Server Port 52

Kentik

AUGUST 14, 2017

Classifying Network Interfaces Enhances Engineering and Business Insights. Given that Kentik was founded primarily by network engineers, it’s easy to think of our raison d’etre in terms of addressing the day-to-day challenges of network operations. are generated by individual routers, switches, and hosts rather than system wide.

IP Address 40

IP Address Routers Network Networking 40

CATO Networks

OCTOBER 5, 2020

All Cisco products running IOS were impacted, including IOS XR Software, NX-OS Software, and RV160 VPN Router. Even worse was how Cisco handled vulnerabilities Cisco IOS XRs Distance Vector Multicast Routing Protocol (DVMRP) (CVE-2020-3566, CVE-2020-3569). One mitigation suggests rate limiting the IGMP protocol.

Firewall 52

Firewall Protocol SASE Network 52

Kentik

JUNE 19, 2017

This data — flow records or datagrams, depending on the protocol — is generated by network devices such as routers and switches. As traffic passes through the router on its way from the generator to the target, the router collects flow records and sends them to Kentik Detect, our big data network visibility solution.

Routers 40

Routers TCP Network Networking 40

Kentik

JULY 31, 2017

When it comes to routing traffic on the global Internet, BGP is the one and only protocol. That’s why network engineers have long used the BGP routing table on routers or looking glasses to get an idea of how their Internet traffic is routed. NetFlow) coming from those devices.

Internet 40

Internet Routers Engineering Network 40

Kentik

JUNE 13, 2023

“One of the wonderful things about standards is that there are so many to choose from.” — Inscription on the Tomb of the Unknown Network Engineer One recurring hot topic in network observability is streaming telemetry. routers, switches, servers, interfaces, and links).

Routers 52

Routers Network Networking Protocol 52

Kentik

DECEMBER 2, 2015

Kentik Detect uses SQL as the query language, but the underlying data is stored in the Kentik Data Engine (KDE), a custom, distributed, column-store database. AND protocol = 6. The WHERE conditions involve protocol 47 this time instead of TCP source port 25. FROM all_devices. Look across all flow sources (e.g.

TCP 40

TCP Protocol Port IP Address 40

CATO Networks

JUNE 1, 2020

For example, videoconferences between engineers and product managers on separate contents can be brought to a standstill because of packet loss or latency. The challenge in the underlying causes of packet loss can be anything from overworked routers to network congestion to software bugs.

Network 52

Network Networking TCP MPLS 52

Kentik

MAY 29, 2018

Modern networks are made up of a collection of routers, switches, firewalls, and other network elements. Establish the degree to which sources, destinations, network devices, users, applications, protocols, and services are generating traffic. A few network capacity planning best practices.

Network 52

Network Networking Bandwidth Data Centers 52

Kentik

MARCH 6, 2019

However, this type of networking model with a flat IP network across the entire Kubernetes cluster creates new challenges for network engineering and operates teams. Google Compute Engine (GCE) - all pods can reach each other and can egress traffic to the internet. Open Virtual Networking (OVN) (Open vSwitch community).

Network 63

Network Networking Application Cloud 63

CATO Networks

APRIL 19, 2017

Easy and Rapid Configuration For years, WAN engineering has meant learning CLIs and scripts, mastering protocols like BGP, OSPF, PBR, and more. Some companies lack the internal engineering expertise, others have the expertise, but far too many elements in their networks.

WAN 40

WAN MPLS Wide Area Network Firewall 40

Kentik

SEPTEMBER 20, 2016

It’s up to IT and network engineering groups to address performance, but to do so they need effective ways to measure and monitor. TCP was designed as a stateful protocol to provide reliability across network infrastructure. Specifically TCP, which is used in over 90% of network transactions. Modern network performance monitoring.

Network 40

Network Networking TCP Server 40

Kentik

MAY 28, 2018

Modern networks are made up of a collection of routers, switches, firewalls, and other network elements. Establish the degree to which sources, destinations, devices, users, applications, protocols, and services are generating traffic. A Few Network Capacity Planning Best Practices. Accurately assess the network impact of new services.

Network 40

Network Networking Bandwidth Data Centers 40

Software Architecture Zen

JUNE 6, 2022

Anyone following the current Web3/cryptocurrency/NFT debate will know that last week 26 computer scientists, software engineers and technologists penned a letter to various U.S. Much like who claims to be a software engineer but is spreading an insane amount of disinformation. They dont even have real tech experts they are a joke.

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Blockchain Financial Banking Education 52