Srivats P (Ostinato) @pstavirs.bsky.social · 06/10/2026More Details:userguide.ostinato.orgDevice Emulation - Ostinato GuidesEmulate one or more IPv4/IPv6 devices in subnets with ARP/NDP resolution and ping support using Ostinato's GUI to replace end hosts in the test topology 000
Srivats P (Ostinato) @pstavirs.bsky.social · 06/10/2026Use device emulation when the DUT needs ARP resolution before forwarding. Without it, the DUT drops traffic because there is no ARP entry for the destination. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 05/10/2026Link:ostinato.orgPython API Easy StartAn easy way to get started with Ostinato Python API by configuring in GUI and doing operations with Python script 000
Srivats P (Ostinato) @pstavirs.bsky.social · 05/10/2026After transmit, use the Ostinato Python API to read port stats and stream stats. Compare Tx and Rx counters per stream to detect packet loss. 110
Srivats P (Ostinato) @pstavirs.bsky.social · 04/10/2026Learn more:ostinato.orgGenerate VLAN tagged trafficLearn how to generate VLAN tagged traffic using Ostinato including single tagged, double tagged (QinQ) or more. Learn how to vary VLAN ids in generated traffic 000
Srivats P (Ostinato) @pstavirs.bsky.social · 04/10/2026Testing VLAN on an access port? Send untagged frames - the switch adds the tag. Testing a trunk port? Add the VLAN tag in Ostinato before sending. 121
Srivats P (Ostinato) @pstavirs.bsky.social · 02/10/2026More:userguide.ostinato.orgPCAP Edit and Replay - Ostinato GuidesImport, edit, and replay PCAP files in Ostinato with options for packet editing and checksum recalculation, ensuring accurate replay 000
Srivats P (Ostinato) @pstavirs.bsky.social · 02/10/2026Ostinato imports PCAP in two modes. Intelligent mode parses each packet into protocol layers you can edit. Raw mode imports packets as-is for exact byte-level replay. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 01/10/2026Great stuff - it just does the job. Great support from the creator as well. 110
Srivats P (Ostinato) @pstavirs.bsky.social · 01/10/2026More Details:ostinato.orgMTU Sweep TestHow to find out MTU for a network path using a sweep test with the Ostinato GUI or the Python API 000
Srivats P (Ostinato) @pstavirs.bsky.social · 01/10/2026To find path MTU, configure a stream with incrementing frame length from 64 to 9000. The largest size that gets through without loss is your path MTU. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 29/09/2026Link:apiguide.ostinato.orgIndex - Ostinato GuidesOstinato is a packet crafter, network traffic generator and analyzer with a friendly GUI and powerful Python API for network test automation. 110
Srivats P (Ostinato) @pstavirs.bsky.social · 29/09/2026Anything you can do in the Ostinato GUI you can also do with Python scripts. Install the python-ostinato package and see the API guide for examples. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 29/09/2026Learn more:ostinato.orgDuplicate packets in Wireshark on WindowsTroubleshoot duplicate packets in Wireshark on Windows. Caused by WinPcap/Npcap conflict. Includes diagnostic steps and permanent fix. 000
Srivats P (Ostinato) @pstavirs.bsky.social · 29/09/2026Seeing duplicate packets in Wireshark on Windows? Check if both WinPcap and Npcap are installed. Remove WinPcap and keep only Npcap - that fixes the duplicates. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 28/09/2026More:srivatsp.comQtScript to QML Migration - Notes from the TrenchesPractical tips and code examples for migrating QScriptEngine to QJSEngine, based on hands-on experience with the Ostinato project 000
Srivats P (Ostinato) @pstavirs.bsky.social · 28/09/2026Ostinato user scripts moved from QtScript (Qt5) to QJSEngine (Qt6). Existing scripts mostly work - the main changes are in how the engine evaluates and returns values. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 27/09/2026Timed transmit in Ostinato - set a duration and let it stop automatically.youtube.comOstinato Timed TransmitFeature preview of Ostinato timed transmit. Enable timed transmit and set desired transmit duration - transmit will auto stop after the set duration. Music: Waltz No. 2 for Accordion in D minor - Steven O'Brien courtesy steven-obrien.net 000
Srivats P (Ostinato) @pstavirs.bsky.social · 25/09/2026More Details:srivatsp.comOstinato show reserved ports broken in 1.3.0Details of what is broken, the fix and a workaround 000
Srivats P (Ostinato) @pstavirs.bsky.social · 25/09/2026Ostinato 1.3.0 had a regression - Show Reserved Ports Only broke the port statistics display. Fixed in the next version. Workaround: toggle the option off and on. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 24/09/2026Link:sourceforge.netOstinatoLearn about Ostinato. Read Ostinato reviews from real users, and view pricing and features of the Network Traffic Generators software 000
Srivats P (Ostinato) @pstavirs.bsky.social · 24/09/2026A very good software to practice QoS, NAT, or any traffic scenario you can think of. Way more useful than iPerf when you need control over the traffic. 110
Srivats P (Ostinato) @pstavirs.bsky.social · 24/09/2026Learn more:userguide.ostinato.orgArchitecture - Ostinato GuidesDiscover Ostinato's controller-agent architecture for traffic generation and testing networks and devices. Use GUI or API for controlling one or more agents 000
Srivats P (Ostinato) @pstavirs.bsky.social · 24/09/2026The Ostinato agent (drone) runs next to the DUT - it does the actual packet send/receive. The GUI controller can run anywhere - even across the WAN. They talk over TCP. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 22/09/2026More:srivatsp.comOstinato ThemesLiven up the Ostinato GUI with themes - both dark and light themes are available 000
Srivats P (Ostinato) @pstavirs.bsky.social · 22/09/2026Ostinato supports dark and light themes via Qt Style Sheets. Select a theme to change the look without modifying any Ostinato code. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 22/09/2026Details:ostinato.orgStreams vs Flows in OstinatoUnderstanding the difference between streams and flows in Ostinato 000
Srivats P (Ostinato) @pstavirs.bsky.social · 22/09/2026One Ostinato stream can generate thousands of flows. Configure variable fields on IP or port to vary per packet - each unique combo is a separate flow. 110
Srivats P (Ostinato) @pstavirs.bsky.social · 21/09/2026More Details:userguide.ostinato.orgSettings - Ostinato GuidesConfigure Ostinato and Drone settings using a .ini file. Customize transmit rate accuracy, RPC server, and port management. 000
Srivats P (Ostinato) @pstavirs.bsky.social · 21/09/2026Drone reads settings from a drone.ini file at startup. Use it to configure transmit rate accuracy, RPC server port, or exclude specific interfaces. 110
Srivats P (Ostinato) @pstavirs.bsky.social · 20/09/2026Link:srivatsp.comOstinato API - Wait for stream transmission to finishHow to use the Ostinato API to detect when stream transmit has finished 000
Srivats P (Ostinato) @pstavirs.bsky.social · 20/09/2026In Ostinato Python scripts, instead of polling the state field to know when transmit has finished, use waitForTransmitFinish() 103
Srivats P (Ostinato) @pstavirs.bsky.social · 18/09/2026Learn more:userguide.ostinato.orgStream Save/Open - Ostinato GuidesOstinato is a packet crafter, network traffic generator and analyzer with a friendly GUI and powerful Python API for network test automation. 000
Srivats P (Ostinato) @pstavirs.bsky.social · 18/09/2026Save configured streams to a file and open them on any port on any compputer. This is also how you import PCAP files into Ostinato - open the PCAP as a stream file. 110
Srivats P (Ostinato) @pstavirs.bsky.social · 18/09/2026Especially response from Srivats for the queries helped me set up custom streams for my application. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 17/09/2026Details:srivatsp.comGenerate IMIX traffic with OstinatoHow to generate Internet Mix (IMIX) traffic using Ostinato traffic generator 000
Srivats P (Ostinato) @pstavirs.bsky.social · 17/09/2026Simple IMIX uses a 7:4:1 ratio of 64, 594, and 1518-byte frames. Ostinato can generate IMIX natively or you can build your own custom mix with multiple streams at different sizes. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 15/09/2026More Details:userguide.ostinato.orgPort Save/Open - Ostinato GuidesOstinato is a packet crafter, network traffic generator and analyzer with a friendly GUI and powerful Python API for network test automation. 000
Srivats P (Ostinato) @pstavirs.bsky.social · 15/09/2026Save an entire port's config - port settings, all streams, and all device groups - to a file. Open it later on the same or a different port. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 15/09/2026Link:srivatsp.comHow to generate MPLS packets using Ostinato HexDumpUse the Ostinato HexDump protocol to generate MPLS or any other protocol not supported by Ostinato 000
Srivats P (Ostinato) @pstavirs.bsky.social · 15/09/2026No MPLS in Ostinato's protocol list? Use the HexDump protocol to define the MPLS label stack inline. An alternative to user scripts when you just need a fixed header. 100
Srivats P (Ostinato) @pstavirs.bsky.social · 14/09/2026Learn more:userguide.ostinato.orgStreams - Ostinato GuidesEasily manage Ostinato packet streams by creating, editing, duplicating, and deleting them through intuitive GUI menu options 000
Srivats P (Ostinato) @pstavirs.bsky.social · 14/09/2026Create, duplicate, and delete streams from the Streams menu. Use the Goto column to loop back to the first stream or stop after a stream. Always click Apply before transmit. 120
Srivats P (Ostinato) @pstavirs.bsky.social · 13/09/2026Yes! I'm the one in the front row, first from right. 010
Srivats P (Ostinato) @pstavirs.bsky.social · 13/09/2026Watch a large PCAP import go from crash to fast in Ostinato.youtube.comOstinato PCAP import - now MUCH faster!The time taken to import a large PCAP file into Ostinato for PCAP replay is now MUCH MUCH faster than earlier! Music: Polka No. 1 for Accordion in C minor - Steven O'Brien courtesy steven-obrien.net 010
Srivats P (Ostinato) @pstavirs.bsky.social · 11/09/2026Details:srivatsp.comOstinato RX stream stats always zeroHow to work around libpcap issue leading to Ostinato Rx stream stats being always zero 000
Srivats P (Ostinato) @pstavirs.bsky.social · 11/09/2026Ostinato Rx stream stats showing zero for VLAN-tagged packets on Ubuntu? It maybe a libpcap issue - the kernel may strip the VLAN tag before libpcap sees it, breaking the sign check. 100
