Version 11.1
- Last Updated: May 14, 2026
- 4 minute read
- Flowmon Products
- Flowmon Packet Investigator
- Documentation
Version 11.1.1
Date: 2021-09-06
Forward compatibility of exported configuration is guaranteed throughout all releases with the same major version number. Between major versions, the last stable release of the previous major version is guaranteed to export configuration that is compatible with the next major version.
Example: For Flowmon Packet Investigator 11 releases, the configuration export from any 11.0.x release is compatible with any 11.1.y release. For upgrades between major versions, the configuration exported from the last 11.1.x release will be compatible with the first 12.0.y release.
What's new
- Starting with Flowmon Packet Investigator 11.1.1, the product uses a new color palette and logo aligned with other products and content offered by Kemp Technologies, Inc.
Fixed defects
- 147984: Improved performance when starting a new recording. A large number of existing recordings no longer negatively impacts API response time for new recordings.
- Analysis failing due to empty recordings is now correctly marked as failed instead of being marked as successfully completed.
- Adaptive buffer size larger than 1024 MB is now correctly handled by the Flowmon Packet Investigator Probe.
- A large number of findings in a single recording no longer breaks the layout of the Recordings table.
Known issues
Flowmon Packet Investigator 11.1.1 is shipped with an outdated version of the Japanese translation of the in-product user guide. This translation will be updated in the next bug fix version.
Warning
- Flowmon Packet Investigator 11.1.1 is compatible only with Flowmon 11.1.7 or newer. You must update your Flowmon installation before updating Flowmon Packet Investigator.
- Starting with Flowmon Packet Investigator 11.1.0 Beta, collector appliances no longer provide the option to explicitly configure the preferred local management port IP address used for communication with probe appliances. To avoid communication issues between the collector appliance and its probe appliances, you must ensure that all probes communicating with the same collector are configured with a management port IP address of the collector, and both control port and data collection port values on the probes match the values configured on the collector. This warning applies only to appliances with custom port configuration. Collectors and probes configured with the default control port and data collection port values are not affected by this change.
- Starting with Flowmon Packet Investigator 11.1.0 Beta, collector appliances no longer delete data from recordings by repeatedly writing over the deleted files. This change brings significant performance benefits when working with large recordings on collectors with heavily used spinning disks or on virtual collectors. On collectors with solid-state disks, it greatly reduces the effect of write amplification and reduces disk wear.
Version 11.1.0
Date: 2021-05-24
Forward compatibility of exported configuration is guaranteed throughout all releases with the same major version number. Between major versions, the last stable release of the previous major version is guaranteed to export configuration that is compatible with the next major version.
Example: For Flowmon Packet Investigator 11 releases, a configuration export from any 11.0.x release is compatible with any 11.1.y release. For upgrades between major versions, the configuration exported from the last 11.1.x release will be compatible with the first 12.0.y release.
What's new
- The Flowmon Packet Investigator web interface has been updated to reduce information noise, highlight actionable intelligence, and improve responsiveness when working with a large number of recordings.
- Analytical capabilities have been extended to include support for ARP, ICMP, and NTP protocols. Support for IoT-specific protocols CoAP, IEC104, GOOSE, MMS, and MQTT has also been added. You can select all these protocols for analysis on recordings made by Flowmon Packet Investigator or on recordings created outside of the product and uploaded as PCAP files.
Fixed defects
- 7632901: Issues resulting in empty recordings after changes in management interface IP configuration on the collector appliance have been resolved. For details, refer to the warning section below.
- 7634509: Issues with the adaptive buffer configuration on monitoring ports of Flowmon Probe 40000 appliances manufactured in H2/2020 or later have been resolved.
- An issue with Flowmon Probe 200000 Pro appliances with Mellanox network interface cards has been resolved. Starting with the 11.1.0 Beta release, Flowmon Packet Investigator Probe is fully compatible with these appliances.
Known issues
Flowmon Packet Investigator 11.1.0 Beta is shipped with an outdated version of the Japanese translation of the in-product user guide. This translation will be updated before a stable version is released.
Warning
- Starting with Flowmon Packet Investigator 11.1.0 Beta, collector appliances no longer provide the option to explicitly configure the preferred local management port IP address used for communication with probe appliances. To avoid communication issues between the collector appliance and its probe appliances, you must ensure that all probes communicating with the same collector are configured with a management port IP address of the collector, and both control port and data collection port values on the probes match the values configured on the collector. This warning applies only to appliances with custom port configuration. Collectors and probes configured with the default control port and data collection port values are not affected by this change.
- Starting with Flowmon Packet Investigator 11.1.0 Beta, collector appliances no longer delete data from recordings by repeatedly writing over the deleted files. This change brings significant performance benefits when working with large recordings on collectors with heavily used spinning disks or on virtual collectors. On collectors with solid-state disks, it greatly reduces the effect of write amplification and reduces disk wear.