Release Notes for SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2

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Updated:October 1, 2026

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Updated:October 1, 2026
 

 

SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2. 3

New software features. 3

New hardware. 3

Changes in behavior 3

Resolved issues. 3

Open issues. 3

Known issues. 4

Compatibility. 4

Supported hardware. 5

Related resources. 5

Legal information. 7


 

SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2

SONiC Release 202405cz.2.3.2 adds support for deploying the Cisco 8101-32FH-O in IP Fabric topologies that use BGP. The validation covered the platform capabilities required for the target deployment, including management, dual-stack interfaces, routing, access control, automation, high availability, zero-touch provisioning, quality of service, troubleshooting, and supported optical connectivity. This release also includes the resolved issues listed below.

New software features

There are no new software features introduced in this release.

New hardware

There is no new hardware introduced in this release.

Changes in behavior

There are no changes in behavior in this release.

Resolved issues

Table 1.             Resolved issues for SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2

Resolved Issues

Description

IPv6 Address were Removed During Zero-Touch Provisioning

With this Fix, Static IPv6 addresses configured on interfaces are now preserved during the zero-touch provisioning process, eliminating the need for an additional configuration reload to restore them.

 

False System LED and System Health Fault Indication

Adjusted memory threshold alerting to avoid system level health faults when memory consumption is less than 90% and updated memory trend monitoring so it no longer influences system-health or LED status.

Open issues

Table 2.             Open issues for SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2

Bug ID

Description

CSCwv30133

Port using QSFP-40/100-SRBD in 100G mode is not coming up after image upgrade to 20260607

CSCwv00025

Port using QSFP-100G-CUXM is not coming up between HF6100-32D and non-Hyperfabric platforms

Known issues

Table 3.             Known issues for SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2

Known Issues

Description

Express Reboot and Log Rotation Timer Coincidence

In an intermittent timing condition where the log rotation timer expiry exactly coincides with the Express Reboot process, the dockers may perform a cold reboot instead of an express reboot.

To prevent this, restart the log rotation timer before the Express Reboot command is triggered.

Intermittent Traffic Loss During Express Reboot

During express reboot, in rare scenarios, a few traffic streams may experience a loss of more than one second. This occurs just after node boots up after express reboot. The system automatically recovers these flows within a few seconds without requiring manual intervention.

Missing MAC in Dataplane During Route Churn

During an intermittent condition with significant route churn, a MAC address may be present in the control plane but missing in the dataplane, causing L2 traffic to be handled as BUM traffic instead of unicast.

To resolve this, execute the command vtysh -c "clear bgp l2vpn evpn <neighbor address>".

Compatibility

This table outlines the versions of various components included in this release.

Table 4.             Component version for SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2

Component

Version          

Linux Kernel

6.1.0-11-2-amd64

SAI API

1.14.0

FRR

8.5.4

LLDP

1.0.16-1+deb12u1

TeamD

1.31-1

SNMPD

5.9.3+dfsg-2

Python

3.11.2-1+b1

SYNCD

1.0.0

swss

1.0.0

Radvd

1:2.19-1+b1

ISC-DHCP

4.4.3-P1-2

sonic-gnmi version

0.1

redis-server

5:7.0.15-1~deb12u4

redis-tools version

5:7.0.15-1~deb12u4

eventd version

1.0.0-0

mgmt-framework version

1.0-01

Supported hardware

Table of supported hardware components and the minimum required software versions.

Table 5.             Supported hardware for SONiC on Cisco 8000 Series Routers, Release 202405cz.2.3.2

Part Number

Description

8101-32FH-O

Cisco 8101 1 RU Chassis with 32x400G QSFP-DD with Open Software on Q200L Silicon.

8102-64H-O

Cisco 8100 2 RU Chassis with 64x100G QSFP28 with Open Software and without HBM on Q200 Silicon.

Related resources

Table 6.             Related resources

Resource

Description

Explore SONiC on Cisco 8000 Series Routers

Provides documentation for installing and deploying SONiC on Cisco 8000 Series Routers.

 

Explore Cisco 8000 SONiC on Interactive Python Notebooks

Introduces use-case-based documentation for SONiC through Learning Labs, offering guidance on use cases and configurations to facilitate deployment. Additionally, it enables experimentation and customization to meet specific network requirements.

Install SONiC on Cisco 8000 Routers

Provides guidance on installing a new SONiC image on Cisco 8000 series routers, covering two installation methods: Open Network Install Environment (ONIE) and the sonic-installer command.

Cisco 8000 Series Routers Data Sheet

Provides detailed specifications and feature information for Cisco 8000 Series Routers in the Data Sheet.

Cisco Software Download Center

Provides SONiC image download options for Cisco 8000 Series Routers.


 

Legal information

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries.

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers.

© 2026 Cisco Systems, Inc. All rights reserved.

 

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