Data Rate vs Line Rate Understanding the difference between data rate and line rate for Ethernet

Link: ostinato.org/guides/...
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Is your 1G NIC maxing out at 762Mbps?

That may be because 762Mbps data rate = 1Gbps line rate!

Read the latest Ostinato guide to know more!

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Ostinato Traffic Generator for Network Engineers Ethernet/IP packet generator, 10/40/100G network traffic generator and tester. Load and functional tests. GUI and Python-API. No special hardware required

In that case if you ever want to play with ostinato.org packet crafter and network tester, let me know! Happy to share a free license.

Sarcasm?

How to generate a TCP SYN flood with Ostinato How to generate a TCP SYN flood with Ostinato to test your network device resilience to SYN flood DDoS attacks

Link:

Although Ostinato is primarily a network functionality and performance testing tool, it can also be used for cyber-security e.g. to check your defenses against a TCP-syn attack.

Periodic reminder that if even a little bit of your job involves looking at packets, you should show up at SharkFest.

Love Wireshark? Sponsor SharkFest, the official Wireshark user and developer conference! SharkFest is heading to Nashvillle, July 18-23, and we’re looking for sponsors to join the fun! Multiple sponsorship levels to choose from or customize your own! Explore and contact sharkfest@wireshark.org.

Duplicate packets in Wireshark on Windows Troubleshoot duplicate packets in Wireshark on Windows. Caused by WinPcap/Npcap conflict. Includes diagnostic steps and permanent fix.

Read the latest Ostinato KB article to find out (and fix!) duplicate packets seen in Wireshark (on Windows)

ostinato.org/guides/...


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Sending 10 packets using Ostinato but seeing 20 in Wireshark?

It may not be Ostinato's fault. Nor Wireshark's either!

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4. Export steam stats as a PDF report
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Ostinato 2.1 will have more stream stats improvements:

1. Remove limitation that Tx stats are 0 during Transmit
2. Manual or Auto refresh stream stats during transmit
3. Shows stream names in addition to GUIDs
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With Ostinato 2.0 we reorganized the stream stats view from a wide table to a tree view which was a major improvement.
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MTU Sweep Test How to find out MTU for a network path using a sweep test with the Ostinato GUI or the Python API

Link to guide: ostinato.org/guides/...
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The best way to learn something is to practice it - we all know this.

That's why labbing is important for network engineers for cert study.

If you are learning or curious about Path MTU discovery, our latest Ostinato guide shows how to lab this feature.
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From the networking community on Reddit Explore this post and more from the networking community

A recent reddit thread on similar topic - www.reddit.com/r/networking...
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Technically speaking, only hardware can detect bit error rate as software only sees frames/packets. But you can use the packet drop/error rates to approx it - or check the NIC stats which has more detailed stats than what the Linux kernel exports.
(1/2)

From a recent Reddit post asking for a Windows 11 traffic generator

Read "push" as "plug"! If only bsky allowed edits ...

I would be remiss if I didn't push Ostinato here! :-)

Why Ostinato TX uses only one core - or does it? Why Ostinato TX uses one CPU core per port and when it actually uses multiple cores. Includes performance optimization tips and Turbo Transmit details.

Our latest guide goes into details!

ostinato.org/guides/...
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"I have a multi-core CPU, but Ostinato is using only one core while the rest are idle" - this is a common performance question we get from customers.
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Emulating multiple networks on a single port How to simulate multiple isolated VLAN networks on a single interface in Ostinato with an IGMP-based example

Link to guide: ostinato.org/guides/...
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Ostinato can emulate a host device - multiple devices in a subnet actually.

Not just that - you can even emulate multiple networks behind a single Ostinato port.

Our latest guide shows you how!
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I feel like when folk music starts getting this good again it’s usually a pretty good indicator that shit is FUCKED

Enabling extra repos for RHEL on OBS How to enable non-default repos like CRB, AppStream, EPEL etc. for RPM packages on RHEL-compatible distros on Open Build Service (OBS)

Blog Post: srivatsp.com/obs-rhel-ext...
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That's where Open Build Service (OBS) really shines! One set of packaging scripts to build for multiple Linux distros.
In my latest blog post, I show how to enable RedHat's multi-repo layout in OBS for RedHat (and clones). (2/3)

As a cross-platform software, Ostinato runs on Windows, MacOS and Linux. But there's not one single Linux, but various distros - Ubuntu, RedHat etc. DEB/RPM packages need to be built individually for each distro. (1/3)

Why Ostinato traffic is not reaching the destination Troubleshooting guide Fix why Ostinato traffic isn't reaching its destination. Resolve MAC address failures, IP configuration issues, and verify network path forwarding

KB article: ostinato.org/guides/...
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Ostinato generated traffic not reaching the intended destination?

Our latest KB article helps you troubleshoot this!
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