sonic-net/sonic-mgmt
Jan 2025 – Jun 2026
12 Months active
Languages Used
PythonYAMLJinja2TextMarkdownJSON
Technical Skills
AnsibleConfiguration ManagementNetwork AutomationNetwork TestingPython ScriptingTest Automation
nnelluri-cisco
PROFILE
Nnelluri-cisco
Over the past year, contributed to the sonic-net/sonic-mgmt repository by building and enhancing automated network configuration, testing, and high availability workflows for SmartSwitch and Cisco SONiC platforms. Developed Python and Ansible-based tooling to generate dynamic configurations, automate deployment, and validate complex topologies, including VLAN-based dataplanes and DPU/HA scenarios. Improved test reliability by integrating gNMI, pytest fixtures, and YAML-driven templates, while addressing regression and flakiness through targeted bug fixes. Focused on scalable, template-driven approaches for onboarding new hardware SKUs, refining BGP, LACP, and DDoS mitigation features, and ensuring robust CI validation for evolving data center and high availability requirements.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
31Total
Bugs
4
Commits
31
Features
16
Lines of code
8,041
Activity Months12
Your Network
487 peopleSame Organization
@cisco.com270
Work History
June 2026
1 Commits
Jun 1, 2026June 2026 monthly summary for sonic-net/sonic-mgmt: Implemented a reliability fix for the ARP Neighbor MAC test in VLAN-based dataplane IP configurations. The test now reads VLAN interface IPs from config_db rather than per-port addresses, ensuring correct exclusion of connected routes when dataplane IPs are assigned to VLANs (e.g., VLAN55). A fallback path remains for legacy configurations where IPs are assigned directly to ports. This change reduces test flakiness during VLAN-based DP migrations and aligns with ongoing VLAN55 deployment.
1 Commits
Jun 1, 2026June 2026 monthly summary for sonic-net/sonic-mgmt: Implemented a reliability fix for the ARP Neighbor MAC test in VLAN-based dataplane IP configurations. The test now reads VLAN interface IPs from config_db rather than per-port addresses, ensuring correct exclusion of connected routes when dataplane IPs are assigned to VLANs (e.g., VLAN55). A fallback path remains for legacy configurations where IPs are assigned directly to ports. This change reduces test flakiness during VLAN-based DP migrations and aligns with ongoing VLAN55 deployment.
June 2026
April 2026
2 Commits • 1 Features
Apr 1, 20262026-04 monthly summary for sonic-mgmt: Delivered a High Availability (HA) crash-resilience test suite for DPUs/NPUs (Module 6) within sonic-mgmt. Added 20 end-to-end tests to validate HA convergence and dataplane continuity during critical process crashes, using PrivateLink traffic as verification and enforcing a 5% maximum traffic loss window. Implemented end-to-end automation including gNMI config push and config_reload teardown. Two new test files were introduced: tests/ha/test_ha_dpu_process_crash.py and tests/ha/test_ha_npu_process_crash.py, covering 8 DPU crash variations and 12 NPU crash variations (4 crash scenarios per process). The work is backed by commits 669a2fb5ab98a6b50b5473fc9d91d38c7fd6ee27 (Module 6 test additions) and aabf3507229a301d4a4d4bb6e8ceb75ba97510ae (skip conditions for HA crash tests). Platform validation ran on Cisco 8102-28FH-DPU-O hardware with NPUs; CI results showed 12 tests passed in a long-haul run with 3696 warnings. Added conditional skip marks to align with existing HA test patterns to avoid running on KVM and non-smartswitch topologies. Overall impact: strengthens HA reliability, reduces risk of dataplane disruption during critical crashes, and accelerates regression detection for HA behavior across DPUs/NPUs.
April 2026
2 Commits • 1 Features
Apr 1, 20262026-04 monthly summary for sonic-mgmt: Delivered a High Availability (HA) crash-resilience test suite for DPUs/NPUs (Module 6) within sonic-mgmt. Added 20 end-to-end tests to validate HA convergence and dataplane continuity during critical process crashes, using PrivateLink traffic as verification and enforcing a 5% maximum traffic loss window. Implemented end-to-end automation including gNMI config push and config_reload teardown. Two new test files were introduced: tests/ha/test_ha_dpu_process_crash.py and tests/ha/test_ha_npu_process_crash.py, covering 8 DPU crash variations and 12 NPU crash variations (4 crash scenarios per process). The work is backed by commits 669a2fb5ab98a6b50b5473fc9d91d38c7fd6ee27 (Module 6 test additions) and aabf3507229a301d4a4d4bb6e8ceb75ba97510ae (skip conditions for HA crash tests). Platform validation ran on Cisco 8102-28FH-DPU-O hardware with NPUs; CI results showed 12 tests passed in a long-haul run with 3696 warnings. Added conditional skip marks to align with existing HA test patterns to avoid running on KVM and non-smartswitch topologies. Overall impact: strengthens HA reliability, reduces risk of dataplane disruption during critical crashes, and accelerates regression detection for HA behavior across DPUs/NPUs.
March 2026
3 Commits • 1 Features
Mar 1, 2026March 2026 focused on delivering a scalable VLAN-based dataplane for SmartSwitch within sonic-mgmt and cleaning up configuration flow to reduce duplication and failures. Key efforts included implementing VLAN-based NPU-DPU dataplane connectivity, dynamic VLAN config generation, and HA-friendly configuration cleanup; coupled with removing stale routes to fix routeCheck failures and stabilizing testbed deployments.
3 Commits • 1 Features
Mar 1, 2026March 2026 focused on delivering a scalable VLAN-based dataplane for SmartSwitch within sonic-mgmt and cleaning up configuration flow to reduce duplication and failures. Key efforts included implementing VLAN-based NPU-DPU dataplane connectivity, dynamic VLAN config generation, and HA-friendly configuration cleanup; coupled with removing stale routes to fix routeCheck failures and stabilizing testbed deployments.
March 2026
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026: Delivered automation-driven improvements for DASH High-Availability deployment and testing in sonic-mgmt, plus a T0 port configuration rework to non-LACP interfaces. Key outcomes include automated deployment of DASH HA configurations across DUT01 and DUT02 via optimized config generators, enhanced validation with new pytest fixtures for DASH HA scope and HA set tables, and a move away from LACP-enabled Port Channels to non-LACP interfaces for T0 ports. All changes were validated through tests, contributing to deployment consistency, reliability, and faster verification in CI. Demonstrates Python tooling, test fixtures, and network configuration strategies that yield measurable business value: reduced manual steps, fewer errors in HA setup, and more flexible port configurations.
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026: Delivered automation-driven improvements for DASH High-Availability deployment and testing in sonic-mgmt, plus a T0 port configuration rework to non-LACP interfaces. Key outcomes include automated deployment of DASH HA configurations across DUT01 and DUT02 via optimized config generators, enhanced validation with new pytest fixtures for DASH HA scope and HA set tables, and a move away from LACP-enabled Port Channels to non-LACP interfaces for T0 ports. All changes were validated through tests, contributing to deployment consistency, reliability, and faster verification in CI. Demonstrates Python tooling, test fixtures, and network configuration strategies that yield measurable business value: reduced manual steps, fewer errors in HA setup, and more flexible port configurations.
December 2025
1 Commits
Dec 1, 2025December 2025 monthly summary focusing on QoS regression stabilization in sonic-mgmt amid introduction of DPU interfaces. Key actions: stabilized regression tests by excluding problematic Ethernet interfaces, preserving CI reliability while integrating new hardware; reduced risk of master QoS regressions; documented approach for future maintenance.
1 Commits
Dec 1, 2025December 2025 monthly summary focusing on QoS regression stabilization in sonic-mgmt amid introduction of DPU interfaces. Key actions: stabilized regression tests by excluding problematic Ethernet interfaces, preserving CI reliability while integrating new hardware; reduced risk of master QoS regressions; documented approach for future maintenance.
December 2025
September 2025
4 Commits • 2 Features
Sep 1, 2025September 2025: Key automation and reliability improvements in sonic-mgmt. Delivered HA automation enhancements, enabling OpenFlow-based HA testing on the DPU smartswitch and introduced a new DASH_HA_SCOPE_CONFIG_TABLE driven by the SDN controller. Fixed DPC role assignment for SmartSwitch interfaces by updating minigraph_device.j2 to use port_name and corrected interface-index-based role logic. Launched the Filterleaf feature with a comprehensive test plan covering subinterfaces, BGP, route-maps, and traffic verification. These efforts increased automation coverage, reduced manual validation time, and improved reliability of HA workflows and switch role configurations. Technologies demonstrated include OpenFlow, DPU/SmartSwitch, SDN controller integration, minigraph templating, and test planning. Business value includes faster validation, reduced misconfigurations, and broader feature verification.
September 2025
4 Commits • 2 Features
Sep 1, 2025September 2025: Key automation and reliability improvements in sonic-mgmt. Delivered HA automation enhancements, enabling OpenFlow-based HA testing on the DPU smartswitch and introduced a new DASH_HA_SCOPE_CONFIG_TABLE driven by the SDN controller. Fixed DPC role assignment for SmartSwitch interfaces by updating minigraph_device.j2 to use port_name and corrected interface-index-based role logic. Launched the Filterleaf feature with a comprehensive test plan covering subinterfaces, BGP, route-maps, and traffic verification. These efforts increased automation coverage, reduced manual validation time, and improved reliability of HA workflows and switch role configurations. Technologies demonstrated include OpenFlow, DPU/SmartSwitch, SDN controller integration, minigraph templating, and test planning. Business value includes faster validation, reduced misconfigurations, and broader feature verification.
August 2025
4 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for sonic-net/sonic-mgmt focusing on feature delivery, testing improvements, and standardization efforts that reduce deployment risk and improve data center reliability.
4 Commits • 2 Features
Aug 1, 2025August 2025 monthly summary for sonic-net/sonic-mgmt focusing on feature delivery, testing improvements, and standardization efforts that reduce deployment risk and improve data center reliability.
August 2025
July 2025
5 Commits • 4 Features
Jul 1, 2025In July 2025, the sonic-mgmt team delivered a set of high-impact features and reliability improvements that advance validation coverage, Cisco onboarding, and test infrastructure, aligning with release readiness and scalable validation needs.
July 2025
5 Commits • 4 Features
Jul 1, 2025In July 2025, the sonic-mgmt team delivered a set of high-impact features and reliability improvements that advance validation coverage, Cisco onboarding, and test infrastructure, aligning with release readiness and scalable validation needs.
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 — sonic-mgmt: Delivered significant enhancements to the SmartSwitch testing framework, increasing reliability and coverage. Key outcomes include gNMI-based HA test utilities, wait_until based ACL verification, and test environment cleanup to remove stale STATE_DB entries, resulting in fewer flaky tests and more deterministic results. In addition, the test harness now filters backplane ports when verifying sfputil error-status, reducing false negatives. Business value: faster validation of SmartSwitch changes, more stable CI runs, and clearer validation signals for feature work. Technologies/skills demonstrated: Python-based test harness enhancements, gNMI integration, HA testing patterns, test cleanup and reliability engineering, sfputil usage, and ACL verification strategies.
3 Commits • 1 Features
Jun 1, 2025June 2025 — sonic-mgmt: Delivered significant enhancements to the SmartSwitch testing framework, increasing reliability and coverage. Key outcomes include gNMI-based HA test utilities, wait_until based ACL verification, and test environment cleanup to remove stale STATE_DB entries, resulting in fewer flaky tests and more deterministic results. In addition, the test harness now filters backplane ports when verifying sfputil error-status, reducing false negatives. Business value: faster validation of SmartSwitch changes, more stable CI runs, and clearer validation signals for feature work. Technologies/skills demonstrated: Python-based test harness enhancements, gNMI integration, HA testing patterns, test cleanup and reliability engineering, sfputil usage, and ACL verification strategies.
June 2025
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for sonic-net/sonic-mgmt: Delivered a new network topology t1-48-lag for Cisco-8102-28FH-DPU-O8C40 hardware along with Jinja2 templates for spine and TOR configuration, including BGP peering and management settings. This work is tracked in commit 12a080ef0db70cbe54e2b04384224718babadef2 and relates to PR #18156. Benefits include automated deployment, standardized configurations, and scalable support for additional hardware SKUs.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for sonic-net/sonic-mgmt: Delivered a new network topology t1-48-lag for Cisco-8102-28FH-DPU-O8C40 hardware along with Jinja2 templates for spine and TOR configuration, including BGP peering and management settings. This work is tracked in commit 12a080ef0db70cbe54e2b04384224718babadef2 and relates to PR #18156. Benefits include automated deployment, standardized configurations, and scalable support for additional hardware SKUs.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for sonic-mgmt. Key feature delivered: DPU configuration generation now supports the t1-smartswitch-ha topology. This required updates to Ansible configuration and Python tooling to generate correct DPU configs for the new topology, specifically modifying config_sonic_basedon_testbed.yml and generate_golden_config_db.py. No major bugs reported this period.
1 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for sonic-mgmt. Key feature delivered: DPU configuration generation now supports the t1-smartswitch-ha topology. This required updates to Ansible configuration and Python tooling to generate correct DPU configs for the new topology, specifically modifying config_sonic_basedon_testbed.yml and generate_golden_config_db.py. No major bugs reported this period.
March 2025
January 2025
3 Commits • 1 Features
Jan 1, 2025Concise monthly summary for 2025-01 highlighting delivered features, fixed bugs, and overall impact for sonic-mgmt (sonic-net/sonic-mgmt).
January 2025
3 Commits • 1 Features
Jan 1, 2025Concise monthly summary for 2025-01 highlighting delivered features, fixed bugs, and overall impact for sonic-mgmt (sonic-net/sonic-mgmt).
Activity
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Quality Metrics
Correctness85.8%
Maintainability83.8%
Architecture82.6%
Performance76.8%
AI Usage23.8%
Skills & Technologies
Programming Languages
JSONJinja2MarkdownPythonTextYAML
Technical Skills
API TestingAnsibleBGPBGP ConfigurationConfiguration ManagementDDoS MitigationDatabase InteractionDatabase ManagementDevOpsHardware SupportHigh AvailabilityHigh Availability TestingLACP ConfigurationLog AnalysisNetwork Automation
Repositories Contributed To
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