Miscellaneous
Latest 10 Articles
Writing an IETF draft - getting attention and building consensus. [Packet Pushers]
Addressing in a networking stack. [ipSpace]
Names, addresses and routes. [ipSpace]
Is one protocol simpler than two? [Lost In Transit]
Networking is fast enough. [Networking Nerd]
Beyond OSI - the "Four Things" model of networking. [Packet Pushers]
How Github learned how hard distributed systems are. [ipSpace] [YouTube]
Getting comfortable with the CLI. [ipSpace] [Julia Evans]
Do we really want creativity in IT? [Packet Pushers]
WISP/FISP design - switch centric (SWC) topology. [StubArea51]
Older Articles
Is the OSI model good for understanding how networks work? [Packet Pushers]
Four architectural pillars of cyber resilience. [Network Computing]
A primer on communication fundamentals. [Dip Singh]
Internet WAN edge design. [ipSpace] [Network Defense]
Unbounded TCP memory usage. [ipSpace] [Cloudflare]
NTP in a nutshell. [ipSpace]
Path failure detection on multihomed servers. [ipSpace]
Trapped by technology fallacies. [ipSpace] [Postmodern Security]
Chassis switch architectures. [ipSpace]
End-to-end arguments in system design. [ipSpace]
180Gbps software-only Linux router. [ipSpace]
Building a small network with ChatGPT. [ipSpace]
DHCP relaying with redundant DHCP servers. [ipSpace]
Netool.io Pro2 - a good thing just got better. [Wirednot]
High-availability clusters in networking. [ipSpace]
The death of CLI. [ipSpace] [SubnetZero]
Off-path firewall with traffic engineering. [ipSpace] [Andrea Dainese]
CI/CD in networking. [ipSpace]
Networking RFCs - to read or not to read? [Packet Pushers]
Stop building networks - it's time for network-as-a-service. [Network Computing]
Understanding the role of digital twins in networking. [Network Computing]
DHCP relaying details. [ipSpace]
Chatbot attack vectors and failure modes in networking and IT. [Packet Pushers] [Russ White]
Real-life not-exactly-networking AI use cases. [ipSpace]
Will DPUs change the network? [ipSpace]
OMNI and AERO. [ipSpace] [Fred Templin, APNIC]
Digital twins are a living and breathing network diagram. [Network Computing]
Lack of use cases -- a lesson about handling hype. [ipSpace] [RNA]
RADIUS & TACACS+ PCAP. [Weberblog]
Thoughts on switch failures. [Packet Pushers]
Who sends TCP RSTs? [Weberblog]
Meaningful question: what problem are we trying to solve? [Packet Pushers]
Why would you need an overlay network? [ipSpace]
Functional separation in network design. [Russ White]
Small servers PCAP. [Weberblog]
Multihoming cannot be solved within the network. [ipSpace]
Network Time Protocol - NTP. [Computerphile YouTube]
EVE-NG download and installation. [ipCisco]
Redundancy is not resiliency. [Networking Nerd]
Maintenance window gone wrong. [Packet Pushers]
Router interfaces and switch ports. [ipSpace]
Don't ask who invented the Internet because it evolved. [EtherealMind]
Situational awareness for network migrations. [StubArea51]
RFC 9199: lessons in large-scale deployments. [Russ White] [RFC 9199]
All problems are hardware problems. [Networking Nerd]
Marketing docs are not written for engineers. [Ethan Banks]
The robustness principle. [Russ White]
Curse you, documentation lacking in details. [Wirednot]
Buffers, congestion, jitter, and shapers. [ipSpace]
Practice until you can't get it wrong. [Networking Nerd]
Beware of vendors bringing white papers. [ipSpace]
DC switching ASICs tradeoffs. [ipSpace]
Simplify and standardise mantra encounters reality. [ipSpace]
Network zen -- the duality of bandwidth. [EtherealMind]
Is Fibre Channel still a thing? [ipSpace]
How to design a network for changing communication demands. [No Jitter]
Detecting byzantine link failures with SNMP. [ipSpace]
Using LEOs and GEOs. [Geoff Huston] [ipSpace]
Is X.25 still alive? [ipSpace]
Network digital twins works best in PowerPoint. [ipSpace]
Device management from the ground up:
Part 1 - Accessing your first device. [Packet Pushers]
Part 2 - Device modes. [Packet Pushers]
Part 3 - Storage and filesystems. [Packet Pushers]
Part 4 - Viewing operational state. [Packet Pushers]
Part 5 - External file management. [Packet Pushers]
Part 6 - Working in ROMMON. [Packet Pushers]
Part 7 - Resetting device passwords. [Packet Pushers]
Part 8 - Configuration archiving. [Packet Pushers]
LISP is a false economy. [ipSpace]
Should we use LISP? [ipSpace]
If you don't listen, your design will fail. [Packet Pushers]
The network does too much. [Networking Nerd] [ipSpace]
Hardware differences between routers and switches. [ipSpace]
Troubleshooting 101 -- what about the ports? [Network Computing]
Load balancing on network devices. [ipSpace] [Christopher Hart]
Anycast fundamentals. [ipSpace]
Optimising the time-to-first-byte. [ipCisco]
Overlay virtual networking examples. [ipSpace]
8 tips for a successful network migration. [Lost In Transit]
Separation of network functions:
Introduction and overview. [StubArea51, PDF]
The business aspects of networking. [ipSpace]
Where would you need DNS anycast? [ipSpace]
Circular dependencies are considered harmful. [ipSpace]
Get to know your tools: nmap ping subnet scan. [Network Computing]
How to not cut off the branch you're sitting on. [Elegant Network]
Reusing underlay network for infrastructure services. [ipSpace]
Non-stop forwarding 101. [ipSpace]
SSO 101. [ipSpace]
Graceful restart 101. [ipSpace]
Graceful restart and other control plane protocols. [ipSpace]
Graceful restart and routing protocol convergence. [ipSpace]
Graceful restart and BFD. [ipSpace]
Interactions between BFD and graceful restart. [ipSpace]
Big picture: BFD, NSF, and graceful restart. [ipSpace]
Non-stop routing (NSR) 101. [ipSpace]
Russ White's rules of network design. [Russ White]
Simplifying networks. [ipSpace] [Elegant Network]
Outage reporting. [Geoff Huston]
NATs, PATs, and network hygiene. [Russ White]
Designing networks: from tricycles to aircraft carriers. [ipSpace]
Should we embrace points of failure? [Networking Nerd]
Deploying plug-and-pray software in large-scale networks. [ipSpace]
Document the first time, every time. [Networking Nerd]
Closing the loop on testing network changes. [Elegant Network]
Local TCP anycast is really hard. [ipSpace]
Rethinking Internet backbone architectures. [ipSpace] [Telia]
Networking isn't just a tool. [Networking Nerd]
The why and how of a two-tier network monitoring topology. [Network Computing]
Transport vs network. [Geoff Huston]
Nping aka Layer 4 ping. [Weberblog]
Complexity of network architecture in the 2020s. [Packet Pushers]
Network architecture 2021 -- old network technologies still relevant. [Packet Pushers]
Network validation. [Elegant Network]
Topology- and congestion-driven load balancing. [ipCisco]
Chasing anycast IP addresses. [ipSpace]
Designing a simple DR solution. [ipSpace] [ipSpace] [Adrian Giacometti]
The importance of line-rate switching of small packets. [ipSpace]
Fast and simple DR. [ipSpace]
The impact of centralised control plane partitioning. [ipSpace]
Capturing IS-IS, GLBP, VRRP. [Weberblog]
Build a virtual lab topology -- VirtualBox support. [ipSpace]
FTP and FTP ports. [ipCisco]
What is a hash? [ipCisco]
Network ports. [ipCisco]
The OSI model: stop it! [Russ White]
What exactly happens after a link failure? [ipSpace]
How to manage interface packet loss thresholds. [No Jitter]
Internet access technologies. [ipCisco]
How fast can we detect a network failure? [ipSpace]
Technologies that didn't: ATM. [Russ White]
How you can prevent packet loss. [No Jitter]
It's time to replace MD5. [NANOG 80]
DNS trends. [Geoff Huston]
History of networking: cable networks. [Russ White]
Scaling the root of the DNS. [Geoff Huston]
CLNS. [Russ White] [ipSpace]
Why routers and switches don't matter now. [EtherealMind] [Packet Pushers YouTube]
Lessons from load balancers and multicast. [ipSpace] [Elegant Network]
The whiteboard and the simulation. [Russ White]
Deterministic networking and new IP. [Russ White]
How not to measure latency. [ipSpace] [StrangeLoop YouTube]
Why you must kill your VPN to support remote work. [Network Computing]
Network complexity series. [Network Collective]
Smart network or dumb? [Russ White]
How DNS works. [Computerphile]
Why your on-switch packet capture doesn't work or is not correct. [Packet Pushers] [ipSpace]
Emerging communications technologies. [ipSpace]
Gaining intuition with network designs. [The Elegant Network]
Intent-based networking: another victim of Sturgeon's law. [ipSpace]
Split tunnelling. [Russ White] [ECI Telecom]
Meaningful availability. [ipSpace] [AdrianColyer] [Usenix PDF]
There are no more green fields. [Networking Nerd]
The contrasted differences of networking. [Forwarding Plane]
Are all networks created equal? [Network Collective]
History of networking: Raj Jain and early transport. [Russ White]
DNSSEC validation. [Geoff Huston]
ASICs for network engineers. [NANOG 78 YouTube]
DNS -- the protocols, the myths, the legends. [NANOG 78 YouTube]
Modern cable networks. [NANOG 78 YouTube]
What is a network protocol? [ipCisco]
Who is WHOIS? [Weberblog]
Be careful when using new features. [ipSpace]
Letting go of clean design. [Russ White]
VoIP captures. [Weberblog]
Anatomy of GRE tunnels. [Packet Pushers]
The Apple II had the lowest input latency ever. [ipSpace]
Do we need maths in networking? [ipSpace]
Obfuscating complexity considered harmful. [Russ White]
Dive into DNSSEC validation. [WeberNet]
4 networking data types to use for comprehensive visibility. [Network Computing]
3 mistakes you may be making when writing an RFP. [No Jitter]
Interconnecting at the edge. [Network Computing]
A network's weakest link may be different than you think. [Network Computing]
Resilience engineering -- the holy grail of business continuity. [No Jitter]
Basic TCP and UDP demos with netcat and telnet. [Weber]
Spirent Test Center:
Overview. [Networking with Fish]
OSPF, BGP and running traffic. [Networking with Fish]
DNS Wars: Episode IV -- a new bypass. [NANOG YouTube]
DNS wars. [Geoff Huston]
Network Time Security:
RFC 1925 rule 5 -- simplicity. [Russ White] [ECI Telecom]
How to build an agile future-proof network. [Network Computing]
A short history of TCP vs BBR. [Packet Pushers]
Anycast DNS in enterprise networks. [ipSpace] [Medium: part 1, part 2]
Segment routing/MPLS on DC whitebox switch and VNF/PNF networking (Nokia, Cisco and Mellanox/Cumulus). [Karneliuk]
WISP design -- migrating from bridged to routed. [StubArea51]
Path MTU Discovery. [ipSpace]
If you have to simulate your whole network, you're doing it wrong. [ipSpace]
Stop using the OSI model. [Russ White]
Networking challenges. [ipSpace]
When redundancy actually helps. [ipSpace]
The art of network maintenance. [Packet Pushers]
The rise of "bulletproof" residential networks. [Krebs]
History of SNMP. [Russ White]
VPN types and protocols of VPN. [ipCisco]
Packet loss and a failing 10GE SFP+ optic. [Michael McNamara]
Best practices, tips and tricks to switch configuration. [Network Computing]
The changing face of network strategy. [No Jitter]
History of networking page. [Russ White]
Would you use leaf/spine or chassis for campus distribution? [Packet Pushers]
Frame Relay Forum -- Basic Guide to Frame Relay Networking. [EtherealMind]
Page attachment: Frame-Relay-Forum-Basics-Guide-to-Frame-Relay-Networking.pdf
How does the zero trust security model impact network design? [Packet Pushers]
Why IT war rooms fail, and why failure is no longer an option. [Network Computing]
Don't base your design on vendor marketing. [ipSpace]
9 things to consider when estimating time. [Packet Mischief]
NTP best practices. [Russ White]
The bullet-proof maintenance window:
Part 1: Get and communicate context. [Packet Pushers]
Part 2: Plan all of your work. [Packet Pushers]
Part 3: Peer review. [Packet Pushers]
Part 4: Work the plan. [Packet Pushers]
Part 5: Validation and discipline. [Packet Pushers]
Part 6: Technical leadership. [Packet Pushers]
How to plan for a network cutover. [Network Phil]
NTP best practices. [Network Collective]
Diameter protocol overview. [ipCisco]
Is intent-based networking real or hype? [Packet Pushers, YouTube]
WAN topology types. [ipCisco]
Create network diagram from LLDP data. [ipSpace]
History of networking -- DECnet. [Network Collective] [Russ White]
What is MLPPP? [ipCisco]
MLPPP configuration on Cisco packet tracer. [ipCisco]
Shifting responsibility in network design and operations. [ipSpace]
10 fixes for when change brings your systems to their knees. [Network Computing]
Working with port security when capturing packets. [Network Computing]
Automatic clean-and-updated firewall ruleset. [ipSpace]
Choose simple solutions. [Russ White]
How to convert a Wireshark trace to an Excel / Open Office graph. [Network Computing]
Four things we should change about networking. [EtherealMind]
Tips from a network detective. [Networking with Fish]
The state of DNSSEC validation. [Geoff Huston]
Broadcast analysis of UPNP and SSDP packets. [Network Computing]
Is the network just a virtual router? [Network Computing]
A quick look at QUIC. [Geoff Huston]
NTP - Network Time Protocol. [ipCisco]
Cisco NTP configuration. [ipCisco]
History of networking -- the Internet. [Network Collective]
The other intent-based networking. [WiredNot]
Leaky abstractions. [ipSpace]
Networks are like plumbing - when metaphors fail. [Russ White]
History of networking: WHOIS. [Network Collective] [Russ White]
Wireshark: IP octet capture filter. [Network Computing]
Chaos engineering. [Network Collective] [Russ White]
Whither network engineering? [Russ White: part 1, part 2, part 3]
Vendor lock-in -- is it really that bad? [Lost In Transit]
Protocol analysis one byte at a time. [Network Computing]
The value of labs. [Network Collective] [Russ White]
ATM: Asynchronous Transfer Mode. [Russ White] [ECI Telecom]
Nerd knobs. [Network Collective] [Russ White]
Microsegmentation. [Tony Bourke YouTube]
Navigating with Wireshark. [Network Computing]
Do I need a WAN? [Lost In Transit]
You're not alone in managing a chaotic heterogeneous network. [Network Computing]
Immutable infrastructure use cases. [Network Computing]
Bifurcation of knowledge. [ipSpace]
The joy of millimetre wave. [NoJitter]
Introducing immutable infrastructure. [Network Computing]
Demystifying DCN topologies: clos/fat trees. [PacketPushers: part 1, part 2]
Supercharging the CLI. [Scott Lowe]
Policy at the edge. [Russ White]
Branch offices need multiple network links to meet user service expectations. [Network Computing]
The next version of HTTP won’t be using TCP. [Ars Technica] [HardOCP]
Measuring IP liveness. [Russ White]
Presenting to the D-Suite. [Networking Nerd]
DNSSEC deployment. [Russ White]
Get smart about network architectures. [Russ White] [SDX Central]
NETCONF:
Ossification and fragmentation. [Russ White]
History or networking: whitebox routers. [Network Collective]
Getting to know the network chaos monkey. [No Jitter]
History of networking: QUIC. [Russ White]
Technologies that didn't: the OSI protocol stack. [Russ White] [ECI Telecom]
7 common network latency culprits. [Network Computing]
Network troubleshooting guidelines. [ipSpace] [Russ White]
DHCP snooping and Option-82. [NExp]
FDDI. [Russ White] [ECI Telecom]
Why networks are evolving toward leaf-spine architectures. [Network Computing]
Intent-based networking in the data center: Cisco vs Juniper. [DC Knowledge]
Traditional leaf-and-spine fabric vs Cisco ACI. [ipSpace]
DNS overview. [ipCisco]
DNS configuration on Cisco routers. [ipCisco]
Centralisation wins. [Russ White] [High Scalability]
3 strategies to fight network silos. [Network Computing]
Nerd knobs and open source in network software. [Russ White]
Solving for scalability. [DC Journal]
Schneier's Law applied to networking. [ipSpace]
Another benefit of open-source networking software. [ipSpace]
Examining emerging protocols. [No Jitter]
AAA protocols: RADIUS and TACACS+. [ipCisco]
The history of networking - The Internet. [Network Collective] [Russ White]
Simplifying network design. [Russ White] [TechTarget]
Document to create more free time. [Packet Pushers]
Production networks with white box. [Russ White] [StubArea51]
List of free and safe DNS services. [EtherealMind]
What is CIR and PIR? [ipCisco]
History of networking - RFC. [Network Collective] [Russ White]
Complexity sells. [Russ White]
Using Wireshark: packet analysis tutorial. [Network Computing]
Build a lab. [Network Phil]
Snowflake networks. [Lost In Transit]
When cutovers cause chaos. [No Jitter]
Simple DDNS solution supporting IPv6 and your own domains using Cloudflare and some Python. [Packet Pushers]
Recursive DNS resolver protocols. [Russ White] [APNIC Blog]
IOS adventures - save the princess. [ipSpace] [IOS Adventures]
SNMP is dead. [NANOG YouTube]
Considerations in network complexity. [Russ White] [IP Journal: PDF]
Network transformation: the elephant in the office. [Network Computing]
Network management best practices. [NetCraftsmen]
Nmap tutorial. [Network Computing]
Whireshark and file compression. [Network Computing]
What is intent-based networking? [ipSpace]
Port scanning techniques. [Network Collective]
History of networking - email. [Network Collective: part 1, part 2] [Russ White: part 1, part 2]
Two kinds of design. [Russ White] [ECI Telecom]
Wireshark packet capture: Tshark Vs. Dumpcap. [Network Computing]
Network engineers need networks. [ESharp]
How to size routers and firewalls. [Network Computing]
Campus network upgrade planning -- 5 tips. [Network Computing]
What's wrong with network diagrams? [Packet Pushers]
Average network delay and queuing theory. [Packet Pushers]
A possible guide to integrity and performance. [Packet Pushers]
Radia Perlman debunks network protocol myths. [Network Computing]
We have to learn how to manage the cattle. [ipSpace] [Randy Bias: presentation 1, presentation 2]
What came first -- VLANs or VRFs? [ipSpace]
Basic terms for Internet. [ipCisco]
The death of the 7-Layer model. [Network Collective]
Oblivious DNS. [Schneier]
Automatic diagramming with PowerNSX. [ipSpace]
History of networking -- LISP. [Russ White] [Network Collective]
Why routers and switches don't matter now. [Packet Pushers]
Intent-based networking: 7 things to know. [Network Computing]
Load balancing is impossible -- Tyler McMullen. [EtherealMind] [YouTube]
Network analysis techniques for large trace files. [Network Computing]
Network design: routers vs switches. [NetCraftsmen]
Is MLAG an alternative to stackable switches? [ipSpace]
Building resilient networks. [Network Collective] [Russ White]
When redundancy strikes. [Networking Nerd]
The dark side of Internet-scale shopping. [Russ White] [Mercatornet]
Low latency networking. [Russ White]
Network refresh or design: why you need a second opinion. [NetCraftsmen]
Building a modern WAN - four tips. [Network Computing]
Easing network migration with Cisco VRF-Lite. [Network Computing]
Wireshark: configuring interface displays. [Network Computing]
Peak DNSSEC? [Russ White] [Geoff Huston]
DNS survival guide. [NANOG 72 YouTube]
Enterprise vs provider? [Russ White]
Wireshark captures with Dumpcap. [Network Computing]
Understanding spoofing. [Russ White] [APNIC Blog]
History of networking - policy based management. [Network Collective]
Evidence-based troubleshooting. [EtherealMind]
Make and repair your own Cat5E cables. [HardOCP]
Network devices. [ipCisco]
Hubs, switches and routers. [ipCisco]
Network topologies. [ipCisco]
History of networking - Paul Vixie. [Russ White]
Networking with intent. [Russ White] [TNP]
WAN and WAN technologies. [ipCisco]
The origins of DNS. [Network Collective] [Russ White]
Is networking a commodity? [Russ White]
How Google ditched VPNs. [Russ White] [TheNewStack]
Packet loss vs latency -- analysing the impact. [Network Computing]
ICMP. [ipCisco]
AAA. [ipCisco]
Let's stop using "just reboot" as a fix. [WiredNot]
Just two switches? [Russ White] [TechTarget]
The myth of network speed. [Network Computing]
When networks have no perimeter, protecting access is critical. [DC Journal]
Internet giants should be broken up. [EtherealMind] [BI YouTube]
Moving complexity to the application layer? [ipSpace]
IPsec VPN overview. [ipCisco]
SNMP overview. [ipCisco]
Isochronous round-trip tester. [ipSpace]
When good enough is no longer enough. [Network Computing]
DNS performance metrics. [Russ White] [APNIC Blog]
Understanding Wireshark capture files. [Packet Pushers]
Bash scripts: CLI vs API. [ipSpace]
Using simple PowerShell scripts. [ipSpace]
Complexity isn't always bad. [Networking Nerd]
Why does it take so long to upgrade network devices? [ipSpace]
Response: upgrading network device software. [ipSpace]
What is a tunnel? [Russ White]
A glance back at the looking glass: will IP really take over the world? [Russ White]
DNS: valuable and vulnerable. [Network Computing]
The characteristics of a well-run network. [Network Collective]
Applying software agility to network design. [Russ White]
What are the marks of a good network? [Network Phil]
Wireshark notes. [Packet Pushers]
Create network diagram from LLDP neighbor information. [ipSpace]
CLI or API... again... and again... and again. [ipSpace]
Why ping when you can cryping? [Network Computing]
Challenges in load balancing traffic. [Lost In Transit]
Why 10 years of uptime is bad. [Packet Pushers]
Why your network should look more like your servers. [Eyvonne Sharp]
Things network engineers hate. [Packet Pushers] [ipSpace]
Troubleshooting: a journey into the unknown. [EtherealMind] [Booking Blog]
DNS a 'victim of its own success'. [Network Computing]
Are you solving the right problem? [ipSpace]
Redundancy does not result in resiliency. [ipSpace]
Using Wireshark to test troubleshooting tools. [Network Computing] [YouTube]
Small site multihoming with DHCP and direct Internet access. [Fragmentation Neede]
Networks are not cars or cellphones. [Russ White]
What kind of design? [Russ White]
Investigating ICMP redirects. [Network Computing] [YouTube]
An opinion in defence of NATs. [Geoff Huston] [Russ White]
The history of networking: BABEL. [Russ White] [Network Collective: YouTube]
How accurate is your protocol analyser? [Network Computing]
Network troubleshooting: the ultimate guide. [Network Computing] [Mike Pennacchi: YouTube]
6 key milestones in computer networking history. [Network Computing]
Detecting network outages with RIPE ATLAS. [Russ White] [APNIC Blog]
The cost of networking hardware. [ipSpace]
Automating documentation. [Networking Nerd]
DNS query name minimisation. [Russ White] [Errata Security]
Why you should document first. [Russ White] [OpenSource]
What is Quantum Internet? [Wired]
Network protocol analysis tip: packet slicing. [Network Computing]
Thoughts on grey failures. [Russ White]
Simplifying the network through abstractions. [Network Computing]
Extended access list configuration with packet tracer. [IPCisco]
The knowledge mortgage. [Russ White]
Troubleshooting Cisco network elements with the USE method. [Packet Mischief, Packet Mischief]
History of networking. [Network Collective, YouTube] [Russ White]
Using iPerf to test router throughput. [Network Computing]
What would open networking look like? [Network Computing]
Legacy converged infrastructure vs hyperconverged infrastructure. [DC Knowledge]
The internet and trust. [Russ White] [APNIC Blog]
Converge your network with PFC - priority flow control. [Russ White] [Cumulus Networks]
Network visibility through active path testing. [Network Computing]
How networks are changing. [Network Computing]
Complexity and the thin waist. [Russ White]
The next generation of whois. [Russ White] [CircleID]
Is internet access a fundamental human right? [ITP Techblog]
What if we designed differently? [Russ White] [CircleID]
14 essential network troubleshooting tools. [Network Computing]
Asymmetric traffic flows and complexity. [ipSpace]
How WAN design is changing. [NetCraftsmen]
The beauty of standardisation. [DC Journal]
Nonblocking vs Noncontending. [Russ White]
Troubleshooting network latency - 6 tools. [Network Computing]
Open undersea cables. [NANOG YouTube]
Tuning the network: lessons learnt from redeploying an ISP's network. [NANOG YouTube]
The Internet is flat - revisited. [NANOG YouTube]
Building a nationwide carrier for less than $1M. [NANOG YouTube]
Sometimes vendor lock-in isn't so bad. [Packet Pushers]
Bastion hosts and custom SSH configurations. [Scott Lowe]
It's not the size of your conference community. [Networking Nerd]
Internet performance testing: speed vs quality. [Network Computing]
Troubleshooting: half split. [Russ White]
Bandwidth boom in the WAN. [Network Computing]
Troubleshooting: models. [Russ White]
DSL pioneer describes terabit future. [EETimes] [The Register]
WEN - Workflow Enhanced Networking. [IPEngineer]
Troubleshooting basics. [Russ White]
Faster network push interface development. [EETimes]
Learning blockchains. [Russ White]
Stability matters. [ipSpace] [CloudScaling]
TraceMON - network debugging made easy - RIPE Labs. [EtherealMind] [RIPE NCC]
Research on tech-support scams. [Schneier] [Securitee PDF]
Microsoft's open approach to networking. [Russ White] [Microsoft Azure]
Evaluating WAN redesign options. [Network Computing]
Comparison of top four vendor's command lines. [ipCisco, PDF]
Practice your Wireshark fu with PCAP challenges. [ipSpace] [Webernetz]
IPAM and RIRs. [Russ White] [APNIC]
7 myths about how the Internet works. [Network Computing]
FAQ on submarine cables. [Russ White] [APNIC Blog]
Don't leave features lying around. [Russ White]
Thwarting IT seagulls. [Network Computing]
Why do we need session stickiness in load balancing? [ipSpace]
Follow-up: load balancers and session stickiness. [ipSpace]
5 advanced network troubleshooting tools. [Network Computing]
Redundancy does not imply fault tolerance. [Russ White] [The Morning Paper]
Four ways to ease network bottlenecks. [Network Computing]
Building reliability. [Networking Nerd]
How to define an IP range with Wireshark. [Network Computing]
The ever-increasing complexity. [ipSpace] [Eyvonne Sharp]
The perfect and the good. [Russ White]
Network performance: packet loss vs delay. [Network Computing]
Networking grows to invisibility. [Networking Nerd]
The root of the DNS. [Russ White] [Geoff Huston]
TCP, congestion control, and buffer bloat. [Russ White]
Network icons. [EtherealMind] [Russ White, ZIP]
IOS-XR in GNS3. [Russ White] [APNIC]
Never take two chronometers to sea. [ipSpace]
Linux CLI for network engineers. [ipSpace] [Errata Security]
Automatically identifying bottlenecks. [Russ White] [LinkedIn]
Content delivery networks move data closer to the edge. [Russ White] [The New Stack]
Two takes on ASIC design. [Networking Nerd]
Protecting the highway to the cloud. [DC Journal]
Device configuration are not a good source of truth. [ipSpace]
How much does network latency matter to application performance? [Packet Pushers]
Use Wireshark to ease network configuration. [Network Computing]
8 skills network engineers need in 2017. [Network Computing]
ACL trace in APIC EM. [PacketU]
APIC EM path trace examples - overlay networks. [PacketU]
Is it really always the network? [Networking Nerd]
Verifying network resilience. [Network Computing]
Generating OSPF, BGP, and MPLS/VPN configurations from network data model. [ipSpace]
Network troubleshooint from the user perspective. [Network Computing]
Data acceleration: how to reduce data and network latency. [DC Journal]
Why networking doesn't get respect anymore. [Network Computing]
Why design simplicity is bad for your network. [Packet Pushers]
Networks are obsolete, insecure and its not getting better. [Packet Pushers]
DNS is part of the TCP/IP stack. [ipSpace] [Russ White]
Raspberry Pi Cisco configuration device. [Packet Pushers]
How to reduce data network latency where others fail. [DC Knowledge]
Thread: finally a mesh protocol that works. [ReadWriteWeb]
How DNS works: a primer. [Network Computing]
Why we may see the end of the private network. [Network Computing]
Network troubleshooting:
TCP SYN analysis. [Network Computing]
TCP SACK analysis. [Network Computing]
TCP window size. [Network Computing]
Do enterprises need VRFs? [ipSpace]
Fabric vs network -- what's the difference? [Russ White]
The impact of ICMP redirects. [ipSpace]
The overlay problem: getting in and out. [PacketLife]
How to create effective network diagrams. [Network Computing]
The cost of networking has not declined. [ipSpace]
The power of protocol analysers. [Ars Technica]
Should I use L2VPN+MACsec or L3VPN+GETVPN? [ipSpace]
Packet Tracer: [Udemy]
Getting started with Open Networking. [Network Computing]
Router basics: the lost configuration. [Network Computing]
How do you modularise a network? [Network Computing]
Understanding DHCP fundamentals. [Network Computing]
Campus network design models. [Network Computing]
Beware the network without an operator. [Russ White] [The New Stack]
Network monitoring. [Russ White] [NetCraftsmen]
Managing the branch network. [Network Computing]
Network management: getting started. [Network Computing]
Network monitoring: what to watch. [Network Computing]
The future of networking:
Russ White. [Lost In Transit] [Russ White]
Pete Lumbis. [Lost In Transit] [Russ White]
TCP congestion avoidance on satellite links. [ipSpace]
What does a control plane do? [Russ White] [ECI]
Analyzing ant ‘hive minds’ could improve network performance. [ExtremeTech]
Demystifying the blockchain: A basic user guide. [NZ Herald]
Solving network documentation problems… with code. [Route-SPF] [Russ White]
You don’t know as much as you think you do. [Russ White] [Network Inferno]
Atrophied network documentation. [Route-SPF]
What makes a network architecture or design good? [Route-SPF] [Russ White]
Split tunnel insecurities. [Russ White]
Does it make sense to build your own networking solutions? [ipSpace]
Network design and second opinions. [Network Computing]
Life on a satellite link. [Russ White] [APNIC Blog]
Rethinking the WAN. [Network Computing]
Boffins map Netflix's Open Connect CDN. [The Register]
Complexity sells. [ipSpace]
Reaction: complexity sells. [Russ White]
Awesome response: complexity sells. [ipSpace]
Basics: what is the difference between routing, switching, bridging and forwarding. [EtherealMind]
Getting to the point of dual-homing. [Russ White]
Where is the explosion of overlay networks? [ipSpace]
Directed ARP and ICMP redirects. [ipSpace]
Directed ARP saga continues. [ipSpace]
How to fight latency. [Russ White] [The New Stack]
Every product needs to scale... to a point. [ipSpace]
DHCP topology customisation options. [Russ White]
DNS privacy. [Russ White] [CircleID]
Today's DNS: transforming application delivery. [Russ White] [DC Journal]
Useful tools for firewall rules checking. [EtherealMind]
What is a failure domain? [Russ White]
PoC testing should never happen. [EtherealMind]
What network management can learn from Google Maps. [Russ White] [NetCrasftsmen]
Universal scaling and complexity. [Russ White]
GUI vs CLI in networking. [Network Computing]
Let's focus on realistic design scenarios. [ipSpace]
It’s worth learning to troubleshoot. [Russ White] [PacketPushers]
TFTP vs FTP: the networking perspective. [Network Computing]
Basic skills: half split troubleshooting. [Russ White]
The value of the packet. [Network Computing]
OSI Model -- moving up-and-down the stack. [INE]
Next-gen DNS: delivering performance and reliability at internet scale. [DC Knowledge]
Your future WAN is a 5G network. [EtherealMind]
RFC reading list. [Russ White]
Something old, something new. [Russ White]
SPAN port vs. TAP: the latency impact. [Network Computing]
The CORD architecture. [Russ White]
Eight ways to maximise network bandwidth. [Network Computing]
CAP theorem and routing. [Russ White]
The design mindset. [Russ White: part 1, part 2, part 3, part 4, part 5]
Sysadmins shouldn't be invovled with routing. [ipSpace]
How to build a network: [Lost In Transit: part 1, part 2] [Russ White]
Cisco says CLI becoming interface of last resort. [The Register]
Getting started with network packet generators. [Network Sherpa]
Router SoC 101. [Russ White] [THG]
The chase for network speed. [Russ White] [NetCraftsmen]
Five ways to fail -- WAN link acceptance. [Network Sherpa]
You want your network to be like Google's? Really? [ipSpace]
Busting DNS myths. [Russ White] [Circle ID]
Why you should care about complexity. [Russ White]
Neighbor discovery protocols. [IPCisco]
Network redesign: VLANs and ports. [Network Computing]
Facebook builds a network troubleshooting system. [Network Computing] [Facebook NetNORAD]
ASICs behind the scenes. [ipSpace] [Stephen Foskett video] [Network Sherpa]
How many IP addresses does an IoT car need? [EtherealMind]
Network redesign: in the field. [Network Computing]
Packet analysis: HSRP, EIGRP, STP And CDP. [Network Computing]
ACL implementation guide. [Network Computing]
Basic network change control process. [Network Sherpa]
Network change -- who's in control? [Network Sherpa]
Next-generation networking skills. [Scott Lowe]
What's in a (DNS) name? [Geoff Huston]
How to avoid 'death by PowerPoint'. [BBC News]
Hierarchy of network needs. [PacketLife]
Network config backups – just the beginning. [Network Sherpa]
Container networking: to overlay or not to overlay. [Pedro Marques]
Control plane protocols for overlay virtual networking -- the madness continues. [ipSpace]
Thoughts on certifications. [Russ White]
Stretched firewalls across Layer-3 DCI -- will the madness ever stop? [ipSpace]
The grumpy old network architects and Facebook. [ipSpace]
What coloring books having in common with networks and nodes. [Wired]
Transport protocols. [Geoff Huston]
Was CLNP really broken? [ipSpace]
Ever heard of role-based access control? [ipSpace]
We need product documentation, not just glitzy demos. [ipSpace]
The lack of historic knowledge is frustrating. [ipSpace]
Sometimes you have to decide how badly you want to fail. [ipSpace]
The paradox of network blind spots. [DC Knowledge]
Interconnection networks. [GazettaByte]
Interface descriptions – your last hope. [Network Sherpa]
The network CLI is dying. [EtherealMind]
Lego bricks and network operating systems. [ipSpace]
Make presentations less daunting by breaking them into small chunks. [Lifehacker] [HBR]
Don't optimise the last 5%. [ipSpace] [StorageMojo]
Why I hate ITIL so much. [EtherealMind]
Walled gardens and other overlay networks. [EtherealMind]
Well known intervals. [Router Jockey]
Designing for "good enough". [Russ White]
Can you avoid networking software bugs? [ipSpace]
Why should I care about networking? [ipSpace]
Some ridiculous SD-WAN claims. [ipSpace]
Routing protocols and SD-WAN. [ipSpace]
SD-WAN and multiple metrics. [Russ White]
Business case for SD-WAN. [ipSpace]
Why I support certifications. [Russ White]
How email became the most reviled communication experience ever. [Engadget]
Centralised control is not centralised control plane. [ipSpace]
Open source routing lab. [Russ White] [Keeping it Classless]
The right tool for the job. [Network Guru]
Why firewalls won't matter in a few years. [EtherealMind]
Measuring DNS behaviour. [Geoff Huston]
Diving into DNS. [Geoff Huston]
Vendor neutral. [Russ White]
Reinventing CLNS with L3-only forwarding. [ipSpace]
A new model for networking is needed. [ReadWriteWeb]
Replacing a central router with a next-gen firewall? [ipSpace]
Going back to mainframes? [ipSpace]
Introduction to storage networking and design. [Lost in Transit]
There's a difference between scaling and not being stupid. [ipSpace]
Learning from Germanwings. [Network Guru]
The zen of sailing through IT projects. [IPengineer]
My new criteria for network design and architecture. [EtherealMind]
Remember your technical integrity. [Network Inferno]
Commodity manufacture is the majority of switch products. [EtherealMind]
We have to get away from the box-focused mentality. [ipSpace]
Getting inside the loop. [Network Guru]
Why does the MTU mean different things? [StackExchange]
The difference between bandwidth and speed. [EtherealMind]
Per-packet load balancing on WAN links. [ipSpace]
Validation testing matters. [PacketU]
Should I go for CCDE or VCIX-NV? [ipSpace]
Load balancing elephant storage flows. [ipSpace]
Leaky abstractions. [Network Guru]
Latency: the killer of spread-out application stack ideas. [ipSpace]
Networking FAQ. [PacketLife]
Why do we have both MDI and MDI-X? [StackExchange]
Don’t let Wireshark’s assumptions mislead your troubleshooting. [PacketU]
Powerpoint doesn't stink. [Network Guru]
Tech time warp: how Bell Labs recruited computer whizzes in the ’70s. [Wired] [YouTube]
Do we have too many knobs? [ipSpace]
ESXi whitebox server. [MellowD]
Overlay to underlay network interactions: document your hidden assumptions. [ipSpace]
Ping sweep an IP subnet. [EtherealMind]
How to tap your network and see everything that happens on it. [Lifehacker]
Network taps, monitoring and visibility fabrics: modern packet sniffing. [IPengineer]
Networking is not as special as we think it is. [ipSpace]
Oh, you want it to work as well? [EtherealMind]
Lessons in successful disaster planning. [Schneier] [Daily Kos]
Network infrastructure as a database. [ipSpace]
Six critical steps to evolving capacity management. [DC Knowledge]
Lorem Ipsum: of good & evil, Google & China. [Krebs]
WTF is... Virtual Customer Premises Equipment? [The Register]
Physical networks in the virtualized networking world. [Network Heresy]
Bell Labs pushes 10Gbps over copper telephone lines. [Ars Technica] [ExtremeTech] [The Register] [HardOCP] [ALU]
Using Cisco’s DevNet “All-in-One VM” as a free router lab. [PacketU]
Visio 2013. [Reddit]
OpenStack operations guide. [OpenStack]
Is ping and traceroute worthless? A co worker just tried to prove this to me. [Reddit]
Network diagrams: font selection and production context -- choosing slab or thin fonts. [EtherealMind]
Can we just throw more bandwidth at a problem? [ipSpace]
Difference between MSS and MTU? [StackExchange]
Why do some common traceroute implementations default to using UDP probes? [StackExchange]
Where do you stand on multi-function network appliances? [The Register]
The death of the corporate network perimeter. [The Register]
The state of network infrastructure. [The Register]
Is it a bad idea to go over 80% on a production link? [Reddit]
Networking, systems, virtualisation resources. [Reddit]
How line rate is line rate? [ipSpace]
Speeding up a slow traceroute in IOS. [PacketU]
I spent several hours playing with VIRL - GNS3 is obsolete. [Reddit]
Load balancing across IP subnets. [ipSpace]
Ethernet connected hard drives, network designs. [EtherealMind]
Does centralised control plane make sense? [ipSpace]
Overlay networking, BFD, and integration with physical network. [EtherealMind]
What are some tech sites you like to visit for work? [Reddit]
Wireshark: How to make it drop anything that does not apply to a filter when capture is running? [Reddit]
How do I start mapping a network? [Reddit]
Why don't more people know how to do packet analysis? [Reddit]
Pair of Nexus 3524 replacing a 6509. [Reddit]
Converged infrastructure: three considerations. [Network Computing]
10 tips for better network diagrams. [NetworkDiagram101]
5-in-1 network engineer's cable. [NExp]
Should we use redundand supervisors? [ipSpace]
Best network diagramming tool? [Reddit]
Alternatives to GNS3? [Reddit]
The value of a microsecond. [PacketLife]
Will transparent caching reshape the future of video on the internet? [GigaOM]
Bad ethernet cable causes only Outlook to fail -- why? [Reddit]
Network diagrams: drawing overlay network layers. [EtherealMind]
What makes network appliances fast? [EtherealMind]
Managed or unmanaged? [Reddit]
The Navy's new underwater internet. [Gizmodo]
Networking is a service, and you are the service provider. [Brad Hedlund]
Whose failure domain is it? [ipSpace]
Downsides of using GNS3? [Reddit]
Selecting shapes by layer. [PacketLife]
Mater of network interoperability. [Network Computing]
Help -- my big expensive router is really expensive! [EtherealMind] [NANOG PDF]
OSI model and networking protocols relationship. [StackExchange]
How to run your own e-mail server with your own domain. [Ars Technica: part 1]
Keep your failure domains small. [ipSpace]
How to avoid network outages -- go back to basics. [Network Computing]
ASA HTTP filtering by domain with host headers. [PacketU]
Why can't we have plug-and-play networking? [ipSpace]
On a Cisco Router, why does a VLAN interface get tied to a physical (sub-interface) port? [Reddit]
How do carriers document their networks? [Reddit]
Network topology diagrams. [Reddit]
Why isn't "last mile" bandwidth symmetrical? [Reddit]
Logical/physical topology question. [Reddit]
Favourite Cisco commands. [Reddit]
Efficient crypto ACLs? [StackExchange]
Limiting VPN traffic with ACL. [StackExchange]
Using Cisco IP SLA to check for routing outages. [Reddit]
Difference between SNMP and RMON? [Reddit]
What would you use at the core? VSS or just routing protocol? [Reddit]
Network diagrams: choosing better and free fonts. [EtherealMind]
Cisco 7600 MUX-UNI on SRE IOS? [StackExchange]
Three ways vendors aggrevate network engineers. [Network Computing]
Detecting time travelers on the Internet is remarkably difficult. [Ars Technica]
End user experience monitoring: the network perspective. [Network Computing]
Build a BAD network with Dummynet. [PacketU]
Network Link Conditioner -- simulating a BAD network. [PacketU]
HTTPS URL filtering on Cisco ASA 5520. [StackExchange]
TCAM relationships in hardware-switching architecture. [StackExchange]
Is different profile-revision numbers alright with Cisco switch-profiles? [StackExchange]
Why does Cisco ios save and display access list entries out of order? [StackExchange]
What is the “NDE” interface on a Cisco 6500? [StackExchange]
What is the expected behaviour of the ARP cache? [StackExchange]
TX-ring-limit values. [StackExchange]
How can I view bandwidth use by ip/host on a Cisco router? [StackExchange]
Source and destination NAT with IOS VPN. [PacketU]
Bitcoin explanation. [Schneier] [Michael Nielsen]
IOS VPN and overlapping addresses. [PacketU]
JUNOS: policy-statement and AS-prepends. [StackExchange]
Cisco 4510R+E: Can I safely use SFP interfaces on the dual sup's to interconnect switches? [StackExchange]
Cisco ASA: which side is “inside” with same security-level? [Stack Exchange]
Does TCP Cwnd keep increasing if transfer is limited by Rwnd? [StackExchange]
Minimum bandwidth guarantee 3750-X. [StackExchange]
WTF is the Internet of Things and how insurers will use it against you. [The Register]
Cisco ASA double NAT with DNS translation. [StackExchange]
On which layer of the OSI Model does the arp protocol belong? [StackExchange]
SPAN impact on ASA performance. [StackExchange]
Wireshark TCP and window size. [StackExchange]
Don't like spam? Complain about it. [Krebs]
Configuring Cisco Nexus 5500 switches with dual-homed FEXs. [NExp]
Troubleshooting NX-OS config sync. [NExp]
Choosing between dynamic and static FEX interface pinning. [NExp]
What is the effect of SVI MTU on Catalyst 6509? [StackExchange]
Does a traceroute/tracert show every hop, or does it skip/hide some details of the path? [StackExchange]
Is it possible to have ranges in two octets in an ACL/object-group? [StackExchange]
The difference between ACL and FPM. [StackExchange]
Firewall administration for sysadmins: a primer. [Network Computing: part 1, part 2, part 3, part 4]
What path does a packet follow through a Cisco Nexus 5k/2k infrastructure? [StackExchange]
What would cause this TCP RTT graph? [StackExchange]
10 free network analysis tools. [Network Computing]
How to make IOS CLI enter a new line automatically. [StackExchange]
HSRP and static NAT behaviour. [StackExchange]
Routing of two gateways via a layer 2 switch. [StackExchange]
Cisco ASA -- minimising challenges with VPN and management traffic. [PacketU]
How are the hosts in the tracert 216.81.59.173 able to use random domain names? [StackExchange]
Traceroute to an Internet address when I'm behind a dynamic-PAT firewall? [StackExchange]
In and outbound dual VRRP connections. [StackExchange]
KEMP load balancers using UCARP (VRRP) - multicast MAC address not being picked up. [StackExchange]
Overlay virtual networking video. [ipSpace]
The network engineer's toy box. [Juniper]
NX-OS: importing already mirrored config into a switch profile. [StackExchange]
'White Space' networks are coming. [HardOCP] [VentureBeat]
How ARP works in the case of a VM? [StackExchange]
Cannot get Cisco ASA-5505 properly configured. [StackExchange]
Cisco ASA cannot get inside VLKAN to Internet through outside VLAN. [StackExchange]
Is it possible to design an E1 redundancy with failover router and single E1 WAN link? [StackExchange]
Is there a good way to standardise on an RS232 over RJ45 pinout? [StackExchange]
Cisco modelling lab (VIRL) behind the scenes. [ipSpace]
Cisco NX-OS: bash scripting at the CLI. [Network Sherpa]
Network troubleshooting checklist. [ipSpace] [Rooigevaar]
Solution for network inventory? [StackExchange]
Cisco commands to find rogue access point connected. [StackExchange]
How many standards are there in networking? [EtherealMind]
Copy running config in one line. [StackExchange]
What is “1 Erlang” for network data traffic? [StackExchange]
Risky business: when disaster strikes with no recovery plan. [DC Knowledge]
Meet four teen hackers, and an even younger one. [ReadWriteWeb]
What exactly is the control plane? [ipSpace]
How does nmap distinguish closed ports from filtered ports? [StackExchange]
TTL overlay in virtual networks. [ipSpace]
What are the different modes in Cisco routers, and why these modes? [StackExchange]
How to be productive when everything's blocked at work. [Lifehacker] [Stuff]
Mastering the art of troubleshooting. [Network Computing]
Mirroring Nexus ACLs in Notepad++. [PacketU]
Overlay networks and QoS FUD. [ipSpace]
On diagrams and information. [EtherealMind]
Five signs of trouble in your network. [Network Computing] [Dark Reading]
WAN acceleration slows down. [Network Computing]
Why do we still use Ethernet? [StackExchange]
Cisco 2960X is 'normal' IOS CLI or not? [StackExchange]
bps vs pps. [Network Exchange]
Modifying traceroute replies. [CCIE Blog]
Sooner or later, someone will pay for the complexity of the kludges you use. [ipSpace]
Load-balancing difference between DNS and IP - forwarding vs redirecting. [StackExchange]
What is the OID needed to generate a ssh crypto key on a Cisco switch or router running IOS using snmpset? [StackExchange]
Hardware -- XOR. [Network Sherpa]
How can I find out where an email really came from? [Lifehacker]
So you don't like overlay networking. [EtherealMind]
4 tips for evaluating next-generation firewalls. [Network Computing]
Best practice using Cisco's “ip-helper” for DHCP? [StackExchange]
Where to cross RX/TX line in fibre optical cabling. [StackExchange]
Cisco IOS Forward / reverse name lookups. [StackExchange]
Control plane protocols in overlay virtual networks. [ipSpace]
Management, control, and data planes in network devices and systems. [ipSpace]
This is what an undersea data cable actually looks like. [Gizmodo]
Long login delay when cisco device is booted. [StackExchange]
Cisco IOS: show ip route output order. [StackExchange]
Cisco 7604 + RSP720 3CXL + WS-X6704-10GE increasing the error counters on the port, but there is no loss through the port. [StackExchange]