Support parsing gearbox configuration from media_settings.json by bgallagher-nexthop · Pull Request #728 · sonic-net/sonic-platform-daemons

bgallagher-nexthop · 2026-01-07T17:23:15Z

Add support for configuring gearbox line-side and system-side signal integrity settings via the media_settings.json configuration file.

Description

See this PR for the HLD describing the high-level design behind this change.

This allows signal integrity settings to be configured for both the line-side and system-side of a gearbox in the following manner:

{
    "GLOBAL_MEDIA_SETTINGS": {
        "1-31": {
            # Note: the speed in the media key for gearboxes is calculated using the number of line-side
            # lanes (i.e port_speed / line_side_lane_count).
            "COPPER100": {
                # Add line-side attributes following the format: gb_line_{pre1|pre2|pre3|main|post1|post2|post3}
                # Add system-side attributes following the format: gb_system_{pre1|pre2|pre3|main|post1|post2|post3}
            }
        }
    },
    "PORT_MEDIA_SETTINGS": {
        "32": {
            "COPPER100": {
                # Same as above -- use the gb_line_{} and gb_system_{} attributes.
            }
        }
    }
}

Motivation and Context

Without this, there is currently no way to configure a gearbox's signal integrity settings via media_settings.json. Instead, configuration is solely managed by the gearbox_config.json file. However, that file does not allow dynamic control of SI settings since it is programmed on gearbox initialization -- if new physical media is used, the values in gearbox_config.json need to be updated manually. The media_settings.json file allows specification of different configurations for different physical media, obviating the need to manually update SI settings when using different physical media. Consolidating signal integrity settings configuration into media_settings.json also simplifies the configuration process overall.

How Has This Been Tested?

Added unit tests, all tests pass.

Performed a manual test on a Nexthop device (device/nexthop/x86_64-nexthop_5010-r0):

Installed this media_settings.json file on the device.
Triggered config reload with sudo config reload.
dump state port Ethernet4 -t -d APPL_DB shows gearbox SI settings were successfully published to APPL_DB: https://gist.github.com/bgallagher-nexthop/63dea2b84ed734447bfcb4742b1b37fc

Which release branch to backport (provide reason below if selected)

I'd like to backport this change to 202511 in order to remove the need to support two different approaches for configuring gearbox TX taps across releases for Nexthop hardware.

mssonicbld · 2026-01-07T17:23:24Z

/azp run

azure-pipelines · 2026-01-07T17:23:34Z

Azure Pipelines successfully started running 1 pipeline(s).

Add support for configuring gearbox line-side and system-side signal integrity settings via the media_settings.json configuration file. The changes here are following the direction set in the HLD at https://github.com/sonic-net/SONiC/blob/39d1069500d8c20b71fef012374ca47c66b62e97/doc/media-settings/Dynamic-gearbox-tuning.md. This allows signal integrity settings to be configured for both the line-side and system-side of a gearbox in the following manner: ``` { "GEARBOX_GLOBAL_MEDIA_SETTINGS": { "1-31": { "line": { "COPPER100": { # pre3, pre2, pre1, main, post1, post2, post3 } }, "system": { "COPPER100": { # pre3, pre2, pre1, main, post1, post2, post3 } }, } }, "GEARBOX_PORT_MEDIA_SETTINGS": { "32": { "line": { "COPPER100": { # pre3, pre2, pre1, main, post1, post2, post3 } }, "system": { "COPPER100": { # pre3, pre2, pre1, main, post1, post2, post3 } }, } } } ``` Without this, there is currently no way to configure a gearbox's signal integrity settings via media_settings.json. Instead, configuration is solely managed by the gearbox_config.json file. However, that file does not allow dynamic control of SI settings since it is programmed on gearbox initialization -- if new physical media is used, the values in gearbox_config.json need to be updated manually. The media_settings.json file allows specification of different configurations for different physical media, obviating the need to manually update SI settings when using different physical media. Consolidating signal integrity settings configuration into media_settings.json also simplifies the configuration process overall. Signed-off-by: Brian Gallagher <[email protected]>

mssonicbld · 2026-01-07T17:27:31Z

/azp run

azure-pipelines · 2026-01-07T17:27:40Z

Azure Pipelines successfully started running 1 pipeline(s).

These previous PRs add support for defining signal integrity settings for gearboxes via media_settings.json: - sonic-net/sonic-platform-daemons#728 - sonic-net/sonic-swss#4113 This commit moves all current signal integrity settings for gearboxes into the media_settings file in the `device/nexthop/x86_64-nexthop_5010-r0` directory. It also removes the older configuration via `gearbox_config.json` so that we only have a single source of truth for all signal integrity configuration on this platform. Signed-off-by: Brian Gallagher <[email protected]>

Copilot

Pull request overview

Adds support in xcvrd for reading gearbox signal-integrity (SI) settings from media_settings.json (both line-side and system-side) and publishing them into APP_DB alongside existing ASIC-side SI configuration.

Changes:

Extend get_media_settings_value() to parse GEARBOX_GLOBAL_MEDIA_SETTINGS / GEARBOX_PORT_MEDIA_SETTINGS with line/system subkeys.
Update notify_media_setting() to optionally publish ASIC-side SI plus gearbox line/system SI (with side-specific field prefixes).
Add unit tests and a JSON fixture covering gearbox media-settings parsing.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
`sonic-xcvrd/xcvrd/xcvrd_utilities/media_settings_parser.py`	Adds gearbox-aware parsing and publishes gearbox SI settings to APP_DB with `gb_line_` / `gb_system_` field prefixes.
`sonic-xcvrd/tests/test_xcvrd.py`	Adds unit tests for gearbox parsing, but currently mutates shared module-level fixtures (order-dependent).
`sonic-xcvrd/tests/gearbox_media_settings.json`	New test fixture for gearbox global/port SI settings in extended media settings format.

sonic-xcvrd/xcvrd/xcvrd_utilities/media_settings_parser.py

sonic-xcvrd/tests/test_xcvrd.py

arlakshm · 2026-02-19T05:54:48Z

@prgeor, @mihirpat1, can please help review and signoff this PR

Signed-off-by: Brian Gallagher <[email protected]>

mssonicbld · 2026-02-23T20:26:32Z

/azp run

azure-pipelines · 2026-02-23T20:26:42Z

Azure Pipelines successfully started running 1 pipeline(s).

prgeor

@bgallagher-nexthop would need a refactor as the parser is getting bigger over time. let me know if we can discuss

bgallagher-nexthop · 2026-02-24T19:26:23Z

@bgallagher-nexthop would need a refactor as the parser is getting bigger over time. let me know if we can discuss

Sounds good, I'd be happy to take this on. Maybe something I could do in a follow-up PR?

Signed-off-by: Brian Gallagher <[email protected]>

mssonicbld · 2026-02-27T00:13:10Z

/azp run

azure-pipelines · 2026-02-27T00:13:19Z

Azure Pipelines successfully started running 1 pipeline(s).

Signed-off-by: Brian Gallagher <[email protected]>

mssonicbld · 2026-02-27T00:14:30Z

/azp run

azure-pipelines · 2026-02-27T00:14:39Z

Azure Pipelines successfully started running 1 pipeline(s).

Signed-off-by: Brian Gallagher <[email protected]>

mssonicbld · 2026-02-27T01:36:01Z

/azp run

azure-pipelines · 2026-02-27T01:36:10Z

Azure Pipelines successfully started running 1 pipeline(s).

Signed-off-by: Brian Gallagher <[email protected]>

mssonicbld · 2026-02-27T02:04:31Z

/azp run

azure-pipelines · 2026-02-27T02:04:39Z

Azure Pipelines successfully started running 1 pipeline(s).

Signed-off-by: Brian Gallagher <[email protected]>

mssonicbld · 2026-02-27T04:01:18Z

/azp run

azure-pipelines · 2026-02-27T04:01:27Z

Azure Pipelines successfully started running 1 pipeline(s).

Signed-off-by: Brian Gallagher <[email protected]>

sonic-xcvrd/tests/gearbox_media_settings.json

Backport #728 to 202511 branch. See that PR for details. --------- Signed-off-by: Brian Gallagher <[email protected]>

vmittal-msft · 2026-03-04T19:57:28Z

@prgeor is this PR good to go ?

mssonicbld · 2026-03-05T20:18:08Z

/azp run

azure-pipelines · 2026-03-05T20:18:17Z

Azure Pipelines successfully started running 1 pipeline(s).

#### Prereq PRs: sonic-net/sonic-platform-daemons#728 sonic-net/sonic-swss#4113 #### Why I did it Prereq changes: This commit first moves all current signal integrity settings for gearboxes into the media_settings file in the device/nexthop/x86_64-nexthop_5010-r0 directory. It also removes the older configuration via gearbox_config.json so that we only have a single source of truth for all signal integrity configuration on this platform. 1) Automate generation of ASIC, gearbox, and PHY configs for different port speeds, instead of maintaining HWSKUs which are inflexible. 2) Derive configuration from platform files: a) port_speed.json (port speed profiles + ASIC/gearbox mapping) b) Q3D_ports.json (ASIC core/PM → lanes/port names) c) CONFIG_DB.PORT (actual ports, speeds, indices, lanes) 3) Add validation so invalid lane/speed combinations are caught early (before swss brings up ports). ##### Work item tracking - Microsoft ADO **(number only)**: #### How I did it 1) Changed docker image template to provide rw permission to hwsku directory to allow for the config generation. 2) The hwsku-init runs everytime the swss starts and generates the configuration file. 3) Introduced a common hwsku pipeline: a) Dataclasses for ASIC ports, gearbox ports, speed profiles, and CONFIG_DB entries. b) Loaders for: port_speed.json → per-port speed profiles + ASIC/gearbox mapping. Q3D_ports.json → core/PM → port → lane map. CONFIG_DB PORT table (or a JSON dump) → typed port map. c) Generators for: Gearbox interfaces list. Per‑PHY phy_config.json content. ASIC specific config d) A run() method that: Calls platform-specific ASIC config generation. Renders Jinja2 templates into nh5010.bcm, gearbox_config.json, and phy*_config.json, with a fallback to defaults/ on error. 4) Currently supports: (400G-4, 100G-2) ASIC config, (400G-8, 100G-4) front port on the ports 1-32. (400G-4, 100G-4) ASIC and front port config (no gearbox) on ports 33-64. #### How to verify it Validated it on mix of 100G and 400G interface: ``` root@humm119:/usr/share/sonic/device/x86_64-nexthop_5010-r0/NH-5010-F-O64# show interface status Interface Lanes Speed MTU FEC Alias Vlan Oper Admin Type Asym PFC ------------- --------------- ------- ----- ----- ------- ------ ------ ------- ----------------------------------------------- ---------- Ethernet0 96,97 100G 9100 rs etp1 routed up up QSFP28 or later N/A Ethernet4 100,101 100G 9100 rs etp2 routed up up QSFP28 or later N/A Ethernet8 104,105,106,107 400G 9100 rs etp3 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet12 108,109 100G 9100 rs etp4 routed up up QSFP28 or later N/A Ethernet16 112,113,114,115 400G 9100 rs etp5 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet20 116,117 100G 9100 rs etp6 routed up up QSFP28 or later N/A Ethernet24 120,121 100G 9100 rs etp7 routed up up QSFP28 or later N/A Ethernet28 124,125 100G 9100 rs etp8 routed up up QSFP28 or later N/A Ethernet32 56,57,58,59 400G 9100 rs etp9 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet36 60,61,62,63 400G 9100 rs etp10 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet40 48,49 100G 9100 rs etp11 routed up up QSFP28 or later N/A Ethernet44 52,53 100G 9100 rs etp12 routed up up QSFP28 or later N/A Ethernet48 40,41,42,43 400G 9100 rs etp13 routed down up N/A N/A Ethernet52 44,45,46,47 400G 9100 rs etp14 routed down up N/A N/A Ethernet56 32,33,34,35 400G 9100 rs etp15 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet60 36,37,38,39 400G 9100 rs etp16 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet64 128,129,130,131 400G 9100 rs etp17 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet68 132,133,134,135 400G 9100 rs etp18 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet72 136,137,138,139 400G 9100 rs etp19 routed down up N/A N/A Ethernet76 140,141,142,143 400G 9100 rs etp20 routed down up N/A N/A Ethernet80 144,145 100G 9100 rs etp21 routed up up QSFP28 or later N/A Ethernet84 148,149,150,151 400G 9100 rs etp22 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet88 152,153 100G 9100 rs etp23 routed up up QSFP28 or later N/A Ethernet92 156,157,158,159 400G 9100 rs etp24 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet96 216,217 100G 9100 rs etp25 routed up up QSFP28 or later N/A Ethernet100 220,221,222,223 400G 9100 rs etp26 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet104 208,209 100G 9100 rs etp27 routed up up QSFP28 or later N/A Ethernet108 212,213,214,215 400G 9100 rs etp28 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet112 200,201,202,203 400G 9100 rs etp29 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet116 204,205,206,207 400G 9100 rs etp30 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet120 192,193,194,195 400G 9100 rs etp31 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet124 196,197,198,199 400G 9100 rs etp32 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet128 64,65,66,67 400G 9100 rs etp33 routed up up QSFP+ or later with CMIS N/A Ethernet132 68,69,70,71 400G 9100 rs etp34 routed up up QSFP+ or later with CMIS N/A Ethernet136 72,73,74,75 400G 9100 rs etp35 routed down up N/A N/A Ethernet140 76,77,78,79 400G 9100 rs etp36 routed down up N/A N/A Ethernet144 80,81,82,83 100G 9100 rs etp37 routed up up QSFP28 or later N/A Ethernet148 84,85,86,87 100G 9100 rs etp38 routed up up QSFP28 or later N/A Ethernet152 88,89,90,91 400G 9100 rs etp39 routed down up N/A N/A Ethernet156 92,93,94,95 400G 9100 rs etp40 routed down up N/A N/A Ethernet160 24,25,26,27 100G 9100 rs etp41 routed down up N/A N/A Ethernet164 28,29,30,31 100G 9100 rs etp42 routed up up QSFP28 or later N/A Ethernet168 16,17,18,19 100G 9100 rs etp43 routed down up N/A N/A Ethernet172 20,21,22,23 100G 9100 rs etp44 routed up up QSFP28 or later N/A Ethernet176 8,9,10,11 100G 9100 rs etp45 routed up up QSFP28 or later N/A Ethernet180 12,13,14,15 100G 9100 rs etp46 routed down up N/A N/A Ethernet184 0,1,2,3 100G 9100 rs etp47 routed up up QSFP28 or later N/A Ethernet188 4,5,6,7 100G 9100 rs etp48 routed down up N/A N/A Ethernet192 160,161,162,163 400G 9100 rs etp49 routed down up N/A N/A Ethernet196 164,165,166,167 400G 9100 rs etp50 routed down up N/A N/A Ethernet200 168,169,170,171 400G 9100 rs etp51 routed down up N/A N/A Ethernet204 172,173,174,175 400G 9100 rs etp52 routed down up N/A N/A Ethernet208 176,177,178,179 400G 9100 rs etp53 routed down up N/A N/A Ethernet212 180,181,182,183 400G 9100 rs etp54 routed down up N/A N/A Ethernet216 184,185,186,187 400G 9100 rs etp55 routed down up N/A N/A Ethernet220 188,189,190,191 400G 9100 rs etp56 routed down up N/A N/A Ethernet224 248,249,250,251 400G 9100 rs etp57 routed down up N/A N/A Ethernet228 252,253,254,255 400G 9100 rs etp58 routed down up N/A N/A Ethernet232 240,241,242,243 400G 9100 rs etp59 routed down up N/A N/A Ethernet236 244,245,246,247 400G 9100 rs etp60 routed down up N/A N/A Ethernet240 232,233,234,235 400G 9100 rs etp61 routed up up QSFP+ or later with CMIS N/A Ethernet244 236,237,238,239 400G 9100 rs etp62 routed up up QSFP+ or later with CMIS N/A Ethernet248 224,225,226,227 400G 9100 rs etp63 routed down up N/A N/A Ethernet252 228,229,230,231 400G 9100 rs etp64 routed down up N/A N/A Ethernet256 256,257,258,259 100G 9100 rs etp65 routed down up N/A N/A Ethernet260 260,261,262,263 100G 9100 rs etp66 routed down up N/A N/A Ethernet-Rec0 621 10G 9100 none Recirc0 routed up up N/A N/A ```  #### Which release branch to backport (provide reason below if selected)  - [ ] 202305 - [ ] 202311 - [ ] 202405 - [ ] 202411 - [ ] 202505 - [x] 202511 #### Tested branch (Please provide the tested image version)  - [x] master ``` SONiC OS Version: 13 OCP SAI Header Version: 1.17.1 Vendor SAI Version: 14.1.0.1.0.0.0.0 Vendor SDK Version: sdk-6.5.34-SP1 Distribution: Debian 13.3 Kernel: 6.12.41+deb13-sonic-amd64 Build commit: e73351b0e6 Build date: Mon Feb 9 23:36:58 UTC 2026 Built by: ubuntu@ip-172-31-13-36 ``` - [ ]  #### Description for the changelog   #### Link to config_db schema for YANG module changes  Signed-off-by: Sonic Build Admin <[email protected]> #### A picture of a cute animal (not mandatory but encouraged)

…26150) #### Prereq PRs: sonic-net/sonic-platform-daemons#728 sonic-net/sonic-swss#4113 #### Why I did it Prereq changes: This commit first moves all current signal integrity settings for gearboxes into the media_settings file in the device/nexthop/x86_64-nexthop_5010-r0 directory. It also removes the older configuration via gearbox_config.json so that we only have a single source of truth for all signal integrity configuration on this platform. 1) Automate generation of ASIC, gearbox, and PHY configs for different port speeds, instead of maintaining HWSKUs which are inflexible. 2) Derive configuration from platform files: a) port_speed.json (port speed profiles + ASIC/gearbox mapping) b) Q3D_ports.json (ASIC core/PM → lanes/port names) c) CONFIG_DB.PORT (actual ports, speeds, indices, lanes) 3) Add validation so invalid lane/speed combinations are caught early (before swss brings up ports). ##### Work item tracking - Microsoft ADO **(number only)**: #### How I did it 1) Changed docker image template to provide rw permission to hwsku directory to allow for the config generation. 2) The hwsku-init runs everytime the swss starts and generates the configuration file. 3) Introduced a common hwsku pipeline: a) Dataclasses for ASIC ports, gearbox ports, speed profiles, and CONFIG_DB entries. b) Loaders for: port_speed.json → per-port speed profiles + ASIC/gearbox mapping. Q3D_ports.json → core/PM → port → lane map. CONFIG_DB PORT table (or a JSON dump) → typed port map. c) Generators for: Gearbox interfaces list. Per‑PHY phy_config.json content. ASIC specific config d) A run() method that: Calls platform-specific ASIC config generation. Renders Jinja2 templates into nh5010.bcm, gearbox_config.json, and phy*_config.json, with a fallback to defaults/ on error. 4) Currently supports: (400G-4, 100G-2) ASIC config, (400G-8, 100G-4) front port on the ports 1-32. (400G-4, 100G-4) ASIC and front port config (no gearbox) on ports 33-64. #### How to verify it Validated it on mix of 100G and 400G interface: ``` root@humm119:/usr/share/sonic/device/x86_64-nexthop_5010-r0/NH-5010-F-O64# show interface status Interface Lanes Speed MTU FEC Alias Vlan Oper Admin Type Asym PFC ------------- --------------- ------- ----- ----- ------- ------ ------ ------- ----------------------------------------------- ---------- Ethernet0 96,97 100G 9100 rs etp1 routed up up QSFP28 or later N/A Ethernet4 100,101 100G 9100 rs etp2 routed up up QSFP28 or later N/A Ethernet8 104,105,106,107 400G 9100 rs etp3 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet12 108,109 100G 9100 rs etp4 routed up up QSFP28 or later N/A Ethernet16 112,113,114,115 400G 9100 rs etp5 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet20 116,117 100G 9100 rs etp6 routed up up QSFP28 or later N/A Ethernet24 120,121 100G 9100 rs etp7 routed up up QSFP28 or later N/A Ethernet28 124,125 100G 9100 rs etp8 routed up up QSFP28 or later N/A Ethernet32 56,57,58,59 400G 9100 rs etp9 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet36 60,61,62,63 400G 9100 rs etp10 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet40 48,49 100G 9100 rs etp11 routed up up QSFP28 or later N/A Ethernet44 52,53 100G 9100 rs etp12 routed up up QSFP28 or later N/A Ethernet48 40,41,42,43 400G 9100 rs etp13 routed down up N/A N/A Ethernet52 44,45,46,47 400G 9100 rs etp14 routed down up N/A N/A Ethernet56 32,33,34,35 400G 9100 rs etp15 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet60 36,37,38,39 400G 9100 rs etp16 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet64 128,129,130,131 400G 9100 rs etp17 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet68 132,133,134,135 400G 9100 rs etp18 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet72 136,137,138,139 400G 9100 rs etp19 routed down up N/A N/A Ethernet76 140,141,142,143 400G 9100 rs etp20 routed down up N/A N/A Ethernet80 144,145 100G 9100 rs etp21 routed up up QSFP28 or later N/A Ethernet84 148,149,150,151 400G 9100 rs etp22 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet88 152,153 100G 9100 rs etp23 routed up up QSFP28 or later N/A Ethernet92 156,157,158,159 400G 9100 rs etp24 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet96 216,217 100G 9100 rs etp25 routed up up QSFP28 or later N/A Ethernet100 220,221,222,223 400G 9100 rs etp26 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet104 208,209 100G 9100 rs etp27 routed up up QSFP28 or later N/A Ethernet108 212,213,214,215 400G 9100 rs etp28 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet112 200,201,202,203 400G 9100 rs etp29 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet116 204,205,206,207 400G 9100 rs etp30 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet120 192,193,194,195 400G 9100 rs etp31 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet124 196,197,198,199 400G 9100 rs etp32 routed up up QSFP-DD Double Density 8X Pluggable Transceiver N/A Ethernet128 64,65,66,67 400G 9100 rs etp33 routed up up QSFP+ or later with CMIS N/A Ethernet132 68,69,70,71 400G 9100 rs etp34 routed up up QSFP+ or later with CMIS N/A Ethernet136 72,73,74,75 400G 9100 rs etp35 routed down up N/A N/A Ethernet140 76,77,78,79 400G 9100 rs etp36 routed down up N/A N/A Ethernet144 80,81,82,83 100G 9100 rs etp37 routed up up QSFP28 or later N/A Ethernet148 84,85,86,87 100G 9100 rs etp38 routed up up QSFP28 or later N/A Ethernet152 88,89,90,91 400G 9100 rs etp39 routed down up N/A N/A Ethernet156 92,93,94,95 400G 9100 rs etp40 routed down up N/A N/A Ethernet160 24,25,26,27 100G 9100 rs etp41 routed down up N/A N/A Ethernet164 28,29,30,31 100G 9100 rs etp42 routed up up QSFP28 or later N/A Ethernet168 16,17,18,19 100G 9100 rs etp43 routed down up N/A N/A Ethernet172 20,21,22,23 100G 9100 rs etp44 routed up up QSFP28 or later N/A Ethernet176 8,9,10,11 100G 9100 rs etp45 routed up up QSFP28 or later N/A Ethernet180 12,13,14,15 100G 9100 rs etp46 routed down up N/A N/A Ethernet184 0,1,2,3 100G 9100 rs etp47 routed up up QSFP28 or later N/A Ethernet188 4,5,6,7 100G 9100 rs etp48 routed down up N/A N/A Ethernet192 160,161,162,163 400G 9100 rs etp49 routed down up N/A N/A Ethernet196 164,165,166,167 400G 9100 rs etp50 routed down up N/A N/A Ethernet200 168,169,170,171 400G 9100 rs etp51 routed down up N/A N/A Ethernet204 172,173,174,175 400G 9100 rs etp52 routed down up N/A N/A Ethernet208 176,177,178,179 400G 9100 rs etp53 routed down up N/A N/A Ethernet212 180,181,182,183 400G 9100 rs etp54 routed down up N/A N/A Ethernet216 184,185,186,187 400G 9100 rs etp55 routed down up N/A N/A Ethernet220 188,189,190,191 400G 9100 rs etp56 routed down up N/A N/A Ethernet224 248,249,250,251 400G 9100 rs etp57 routed down up N/A N/A Ethernet228 252,253,254,255 400G 9100 rs etp58 routed down up N/A N/A Ethernet232 240,241,242,243 400G 9100 rs etp59 routed down up N/A N/A Ethernet236 244,245,246,247 400G 9100 rs etp60 routed down up N/A N/A Ethernet240 232,233,234,235 400G 9100 rs etp61 routed up up QSFP+ or later with CMIS N/A Ethernet244 236,237,238,239 400G 9100 rs etp62 routed up up QSFP+ or later with CMIS N/A Ethernet248 224,225,226,227 400G 9100 rs etp63 routed down up N/A N/A Ethernet252 228,229,230,231 400G 9100 rs etp64 routed down up N/A N/A Ethernet256 256,257,258,259 100G 9100 rs etp65 routed down up N/A N/A Ethernet260 260,261,262,263 100G 9100 rs etp66 routed down up N/A N/A Ethernet-Rec0 621 10G 9100 none Recirc0 routed up up N/A N/A ```  #### Which release branch to backport (provide reason below if selected)  - [ ] 202305 - [ ] 202311 - [ ] 202405 - [ ] 202411 - [ ] 202505 - [x] 202511 #### Tested branch (Please provide the tested image version)  - [x] master ``` SONiC OS Version: 13 OCP SAI Header Version: 1.17.1 Vendor SAI Version: 14.1.0.1.0.0.0.0 Vendor SDK Version: sdk-6.5.34-SP1 Distribution: Debian 13.3 Kernel: 6.12.41+deb13-sonic-amd64 Build commit: e73351b0e6 Build date: Mon Feb 9 23:36:58 UTC 2026 Built by: ubuntu@ip-172-31-13-36 ``` - [ ]  #### Description for the changelog   #### Link to config_db schema for YANG module changes  Signed-off-by: Sonic Build Admin <[email protected]> #### A picture of a cute animal (not mandatory but encouraged)

bgallagher-nexthop force-pushed the bgallagher.gearbox_si_settings branch from 50035b4 to 88bad8a Compare January 7, 2026 17:27

bgallagher-nexthop mentioned this pull request Jan 7, 2026

Add updated dynamic gearbox tuning documentation sonic-net/SONiC#2174

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bgallagher-nexthop mentioned this pull request Jan 7, 2026

Move gearbox signal integrity settings to media_settings.json nexthop-ai/sonic-buildimage#2

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bgallagher-nexthop marked this pull request as ready for review January 9, 2026 17:55

arpit-nexthop mentioned this pull request Feb 11, 2026

Allow for the speed change in NH-5010 by updating the config_db.json sonic-net/sonic-buildimage#25423

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arlakshm requested review from kenneth-arista and prgeor February 11, 2026 22:18

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bgallagher-nexthop added 2 commits February 23, 2026 18:32

Merge branch 'master' into bgallagher.gearbox_si_settings

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Signed-off-by: Brian Gallagher <[email protected]>

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eswaran-nexthop added this to SONiC Chassis Feb 25, 2026

bgallagher-nexthop added 2 commits February 27, 2026 00:10

Undo all changes

3982dd9

Signed-off-by: Brian Gallagher <[email protected]>

Make xcvrd aware of gearbox line-side lane count

205f8f1

Signed-off-by: Brian Gallagher <[email protected]>

delete gearbox_media_settings.json test fixture

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Signed-off-by: Brian Gallagher <[email protected]>

minor change

4751176

Signed-off-by: Brian Gallagher <[email protected]>

Add tests that use the gearbox media settings format

18f6a5a

Signed-off-by: Brian Gallagher <[email protected]>

Fix test data error

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Signed-off-by: Brian Gallagher <[email protected]>

bgallagher-nexthop mentioned this pull request Feb 27, 2026

Update media settings for Nexthop 5010 sonic-net/sonic-buildimage#25732

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bgallagher-nexthop added a commit to nexthop-ai/sonic-platform-daemons that referenced this pull request Feb 27, 2026

Backport sonic-net#728 to 202511

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Signed-off-by: Brian Gallagher <[email protected]>

This was referenced Feb 27, 2026

Support parsing gearbox configuration from media_settings.json #766

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Update media settings for Nexthop 5010 sonic-net/sonic-buildimage#25734

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Update HLD to account for new media_settings.json format for gearboxes sonic-net/SONiC#2232

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arlakshm pushed a commit that referenced this pull request Mar 4, 2026

Support parsing gearbox configuration from media_settings.json (#766)

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Backport #728 to 202511 branch. See that PR for details. --------- Signed-off-by: Brian Gallagher <[email protected]>

Merge branch 'master' into bgallagher.gearbox_si_settings

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prgeor merged commit 4c23a4e into sonic-net:master Mar 9, 2026
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github-project-automation bot moved this to Done in SONiC Chassis Mar 9, 2026

mssonicbld mentioned this pull request Mar 12, 2026

[action] [PR:25423] Allow for the speed change in NH-5010 by updating the config_db.json sonic-net/sonic-buildimage#26150

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bgallagher-nexthop commented Jan 7, 2026 •

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