Aviz Certified Community SONiC (CCS) Release Notes CCS 1.1

April 28, 2026

Overview

Aviz CCS is a set of switch OS images built and certified by Aviz and qualified with a list of specific hardware platforms from a range of hardware partners.

Aviz CCS is based on Community SONiC, enhanced with additional features and fixes based on Aviz's long experience of supporting community SONiC production deployments with enterprise and telco customers.

The release notes for Aviz CCS release 1.1 serve as a reference for customers and partners to understand the capabilities, hardware support, and deployment considerations for Aviz CCS 1.1.

Key contents of this document include:

01

Supported Features

Detailed coverage of Layer 2, Layer 3, QOS, Telemetry, and management features available in CCS 1.1, including enhancements over the baseline Community SONiC.

02

Supported Hardware (HW SKUs)

A list of validated hardware platforms, along with a feature matrix mapping specific capabilities to each supported SKU.

03

Scalability Information

Maximum supported scale for various resources and features per hardware SKU, guiding network planning and deployment.

04

Customer Use Cases

Sample scenarios demonstrating practical applications of CCS 1.1 in real-world networking environments.

05

Known Limitations

Documented constraints and limitations to help set expectations for feature behavior and performance.

This release document serves as a single source of truth for understanding CCS 1.1's functional capabilities, hardware support, and recommended deployment scenarios, enabling network architects and operators to plan and deploy CCS 1.1 effectively.

Supported Features

This section presents an overview of the key networking features in CCS 1.1. For clarity, the features are organized by functional category, offering a clear view of the system's Layer 2, Layer 3, QOS, Telemetry, and Management capabilities.

Features with a *† are those that are in addition to what the current Community SONiC baseline includes. Key enhancements for CCS 1.1 make SONiC source code available for these features and will work with the community to get them upstreamed into future community baseline releases.

Layer 2 (L2)

• VXLAN (Access/Access)
• Link Aggregation (LAG/LACP)
• Static vLAN
• LLDP
• PVST*
• MSTP (Multiple Spanning Tree Protocol)*
• BPDUGuard*
• DHCP Snooping*
• 802.1X*
• MACSec*
• Port Speed/FEC Configuration
• Port Breakout

Layer 3 (L3)

• BGP (Unnumbered)
• Router Portlink Channel
• DoS
• Sub-Interface
• Static Routes
• ECMP
• DHCP Relay/Helper*
• BFD
• RIF(L3)*
• L2 VXLAN
• VRF
• vRRP
• IGMP
• SNAP*

Quality of Service (QoS)

• DSCP
• DSCP Mapping
• Storm Control

Telemetry

• gNMI
• Streaming Telemetry
• Integration of ONES Agent 4.2.0*

Management

• ZTP
• CoPP
• NTP
• Tacacs+
• SNMP v1/v2c/v3
• TACLI*
• ACL IPv4
• Syslog
• Radius*

New Features & Enhancements

MSTP (Multiple Spanning Tree Protocol) support

Improved platform stability with resolution of key bugs

FMCLI enhancements for better usability

Integration of ONES Agent 4.2.0

Supported Hardware SKUs (HW SKU)

This section provides the list of supported hardware SKUs that have been validated with Aviz CCS 1.1

Use Cases

IP CLOS

In a traditional IP CLOS deployment, Aviz CCS 1.1 enables a scalable and resilient leaf-spine fabric built entirely on Layer 3 routing. Leaf switches provide server or top-of-rack connectivity, while spine switches act as a high-bandwidth, non-blocking core. With BGP and ECMP, the fabric achieves efficient load balancing, uniform latency, and fast convergence across the network.

IP CLOS designs are ideal for environments that require predictable performance and horizontal scalability, such as modern data centers, high-performance compute clusters, large-scale enterprise infrastructures, and cloud or edge deployments. By avoiding overlays or tunneling mechanisms, this architecture delivers operational simplicity while supporting growth in both traffic and node density.

VXLAN And BGP-EVPN

In a VXLAN BGP-EVPN deployment, Aviz CCS 1.1 transforms a standard IP CLOS fabric into a fully virtualized, multi-tenant overlay network with advanced Layer 2 and Layer 3 extension capabilities. While the underlay remains a resilient leaf-spine topology built on Layer 3 routing, the overlay introduces VXLAN tunneling with BGP EVPN as the control plane, enabling scalable MAC and IP distribution across the fabric.

VXLAN BGP-EVPN allows each leaf switch to operate as a VTEP (VXLAN Tunnel Endpoint), supporting distributed anycast gateways and seamless host mobility across the network. The EVPN control plane eliminates traditional flood-and-learn behavior by providing control-plane-based MAC/IP learning, ARP suppression, and efficient BUM replication. This results in reduced broadcast traffic and improved convergence for dynamic and virtualized workloads.

This architecture is ideal for environments that require tenant isolation, workload mobility, and elastic scale — such as cloud data centers, multi-tenant enterprise networks, container platforms, and virtualized compute clusters. By combining open standards with a programmable overlay, VXLAN BGP-EVPN enables operators to achieve flexibility, segmentation, and operational consistency without compromising the deterministic performance of the underlying CLOS fabric.

Known Issues: Warm reboot is not supported.