Cisco IOS Release 15.6(3)M6b - Release Notes for Cisco IR800 Industrial Integrated Services Routers
The following release notes support the Cisco IOS 15.6(3)M6b release. These release notes are updated to describe new features, limitations, troubleshooting, recommended configurations, caveats, and provide information on how to obtain support and documentation.
Note : Throughout this document you will see IR800. In this reference, it is meant as IR809 and IR829.
Image Information and Supported Platforms
Note : You must have a Cisco.com account to download the software.
Cisco IOS Release 15.6(3)M6b includes the following Cisco IOS images:
■System Bundled Image: ir800-universalk9-bundle.SPA.156-3.M6b
This bundle contains the following components:
–Guest Operating System: ir800-ref-gos.img.188.8.131.52.gz
–MCU Application: 33
The latest image file for the IR800 series is:
Click on the 809 or 829 link to take you to the specific software you are looking for.
The IR809 and IR829 links show three entries to choose:
■IOx Fog Node Software
The IR829 also includes downloads for the AP803 Access Point Module:
■ Autonomous AP IOS Software
■ Lightweight AP IOS Software
Note : The ir800-universalk9-bundle.SPA.157-3.M6b bundle can be copied via Trivial File Transfer Protocol (TFTP) or SCP to the IR800, and then installed using the bundle install flash: <image name> command. The ir800-universalk9-bundle.SPA.157-3.M6b.bin file can NOT be directly booted using the boot system flash:/image_name. Detailed instructions are found in the Cisco IR800 Integrated Services Router Software Configuration Guide.
Note : The cipher dhe-aes-256-cbc-sha (which is used with the commands ip http client secure-ciphersuite and ip http secure-ciphersuite) is no longer available in IOS 15.6(3)M and later as part of the weak cipher removal process. This cipher was flagged as a security vulnerability.
Caution : On older IOS releases, a problem exists where the MCU upgrade fails to complete and the IR829 stays in bootloader mode. The router will get stuck in ROMMON mode and must be sent back to Cisco with a RMA. The IR829 should only be upgraded to IOS version 15.6(3)M x. For example:
If the IR829 is running 15.5(3)M2, DO NOT upgrade to 15.5(3)M2. Go straight to 15.6(3)M x.
This release has the following limitations or deviations for expected behavior:
Caveat CSCvf76265 crosses over several different IOS software releases, and is a platform driver code issue. It is included here as a known limitation with the IR800 Routers.
On the IR800, the core dump fails to write into the local flash. The IOS is running as a virtual machine and then hypervisor is running underneath. The local flash is provided by the hypervisor as a virtual disk. When a crash occurs, this virtual disk is no longer available therefore copying to flash will fail. The workaround is to use an ftp server to copy the core dump to.
Please ensure there is a minimum 30MB additional space in the flash: file system before attempting an upgrade or downgrade between releases. Otherwise, the FPGA/BIOS will not have enough space to store files and perform the upgrade. In these current releases, the bundle installation will not display a warning, but future releases from September 2019 going forward will have a warning.
FPGA and BIOS have been signed and updated to versions 2.9.0 and 24 respectively.
Going forward, for the 15.6 Release Train, this image (15.6-3.M6b) is considered as the baseline. Downgrade is unsupported. If the user downgrades, the FPGA/BIOS will not downgrade and continue to remain as 2.9.0 and 24 respectively. Functionality-wise, everything remains exactly the same.
Note : After upgrading to this release, make sure to delete any old image files that may still be in flash:. This will prevent an unintended IOS downgrade.
Caveats describe unexpected behavior in Cisco IOS releases. Caveats listed as open in a prior release are carried forward to the next release as either open or resolved.
Note : You must have a Cisco.com account to log in and access the Cisco Bug Search Tool. If you do not have one, you can register for an account.
For more information about the Cisco Bug Search Tool, see the Bug Search Tool Help & FAQ.
■ CSCvp74268 - IR809 and IR829
Bundle install should internally handle "firmware downgrade enable" check.
Symptoms : If you manually downgrade hypervisor and IOS only from releases (159-3.M+, 158-3.M3+, 156-3.M7+, 157-3.M5+) to the releases (158-3.M2a, 157-3.M4b, 156-3.M6b), the router will be stuck in aboot loop.
Workaround : If you use the recommended 'bundle install' to downgrade, the process will run correctly.
Note : Future releases 159-3.M+, 158-3.M3+, 156-3.M7+, 157-3.M5+ have this issue resolved. Manual and bundle install work, although bundle install continues to be the recommended option for full functionality.