Open Networking and SONiC: An Alternative to Traditional Vendors
·2 min read·363 words
Open Networking and SONiC (Software for Open Networking in the Cloud) are transforming the data center in 2026. Hardware/software disaggregation combines white-box switches with an open-source NOS. Adoption is widespread among hyperscalers (Microsoft, eBay, LinkedIn), while mature enterprises are also making the transition. SONiC 2026 guide.
The disaggregation concept
Breaking away from the vertically integrated model (Cisco switches = hardware + IOS):
- Hardware: white-box platforms from Celestica, Edgecore, Delta, and Ufispace
- ASICs: Broadcom Tomahawk, Jericho, NVIDIA Spectrum, Cisco Silicon One
- NOS: SONiC, DentOS, OcNOS, Cumulus Linux (end-of-life)
- Savings: 40-60% compared with new Cisco/Juniper equipment
SONiC architecture
- Microsoft open-source project (since 2016) + Linux Foundation (2022)
- Linux kernel + Docker containers for each feature
- SAI (Switch Abstraction Interface): ASIC abstraction
- Redis DB for configuration state
- YAML + JSON configuration, REST API
- Multi-vendor support: Broadcom, Mellanox/NVIDIA, Marvell, Innovium
SONiC hardware vendors
- Celestica: DX010, DX020, DX030 series
- Edgecore: AS5712, AS7326, AS9716
- Delta: AG9032
- Ufispace: S9110, S9705
- NVIDIA Spectrum-4 + SONiC: 400G/800G
Global adoption
- Microsoft Azure: 100% SONiC across the Azure fabric
- LinkedIn: migration completed
- eBay: deployed in 2022
- Target: pilot program underway
- French enterprises: Leroy Merlin pilot program, limited adoption at Naver
Features supported by SONiC
- BGP, OSPF, IS-IS
- VXLAN EVPN
- ACLs, QoS
- LACP, LLDP
- SNMP, streaming telemetry
- MPLS (still limited)
- Not supported: proprietary ACI/DNA features and some OEM-specific features
SONiC advantages
- Cost: 40-60% CAPEX savings
- Flexibility: features delivered through containers
- No vendor lock-in
- Active community
- Rapid development: frequent releases
Disadvantages
- Operational complexity: requires a team with DevOps and networking expertise
- Support: community-based or commercial through vendors (Edgecore, NVIDIA)
- Feature gaps compared with mature Cisco/Juniper platforms
- Troubleshooting: requires advanced Linux expertise
Commercial SONiC distributions
- NVIDIA Cumulus Linux + SONiC: enterprise support
- Broadcom SONiC: official distribution
- SONiC-VS from NVIDIA: simulation
- Edgecore SONiC: commercial support
Alternative open NOS platforms
- DentOS (Linux Foundation): retail + campus edge
- IP Infusion OcNOS: commercial open NOS
- SwitchDev (native Linux kernel)
When to choose SONiC
- Data centers with a mature DevOps team
- Tight budgets + large-scale deployments (>100 switches)
- Modern workloads (Kubernetes, microservices)
- Digital sovereignty: no dependency on Cisco/Juniper
Order from OPTINOC
SONiC services: Celestica/Edgecore hardware, deployment, and support. Suitability assessment against Cisco/Juniper. Quote for data centers with 20-500 switches within 2 weeks.