LCOS SX Release

The operating system for your R&S®LANCOM switches

New features, targeted optimizations, and regular updates: With LCOS SX, Rohde & Schwarz Networks and Cybersecurity continuously enhances the operating system for R&S®LANCOM switches. Download the latest version for your device and benefit from the newest features and improvements.

Download of the current version

You will find the current LCOS SX release version as well as all active predecessor releases in our download portal. Simply enter your desired product and download the software free of charge!

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Feature highlights

LCOS SX 5.30 SU3 features

For R&S®LANCOM switches of the CS and YS series

A security vulnerability in the Linux TCP/IP stack, described in CVE-2026-98432, has been fixed.

LCOS SX 5.20 SU13 features

For R&S®LANCOM switches of the XS-6000, XS-5000, and XS/GS-4500 series

A security vulnerability in the Linux TCP/IP stack, described in CVE-2026-98432, has been fixed.

LCOS SX 4.30 SU11 features

For R&S®LANCOM switches of the series XS- / GS- / IGS-3000, and GS-2400

A security vulnerability in the Linux TCP/IP stack, described in CVE-2026-98432, has been fixed.

LCOS SX 3.34 RU11 features

For R&S®LANCOM switches GS-2326P+, GS-2326+, GS-2310P+, GS-2310,
GS-2328F

Resolution of a possible reboot during DNS resolutions while experiencing connection issues to the R&S®LMC
Correction of the display of the default IP address after DHCP lease expiration on LMC-managed switches
Fix for the calculation of the SNMP engine time, restoring proper SNMP walk functionality after long uptime periods

Information on the lifecycle management

Lifecycle policies

With Rohde & Schwarz Networks and Cybersecurity, you have a manufacturer at your side that ensures strong investment protection and reliable long-term planning for your infrastructure through transparent lifecycle policies.

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Firmware status

Keep track of the current software maintenance status of all operating systems with the version overview. It clearly distinguishes between the different versions and provides recommendations for their deployment.

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Release process

Our aim is the optimal preparation of our operating systems and other software for its use in practice. This is why we enter into active dialog with our customers even during the development phase as part of our release procedure.

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Note for LCOS SX download

Before upgrading your device to a new firmware it is essential to backup your device’s configuration. Due to extensive features it is not possible to downgrade to a previous firmware without using the backup configuration. Never disconnect the device from power supply while updating the firmware. In this case the device won’t start again.

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