Feature/tofino backend#5
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April 14, 2026 12:39
Introduces openoptics/backends/tofino/ with SSH/SCP-based deployment, BFRt control plane, P4 sources for emulated OCS and openoptics-tor, and config-driven multi-ToR setup. Moves existing Mininet-specific P4 and BMv2 targets under openoptics/backends/mininet/ and prefixes the corresponding examples with mininet_. Refactors control-plane plumbing so backends consume structured TableEntry objects instead of BMv2 CLI strings, adds a supports_device_manager flag to gate Thrift setup, and extends routing/topology with HoHo optimal-substructure, VLB random sentinel, and guardband-aware schedules. Expands unit tests for the new routing and TableEntry plumbing.
The openoptics-tor and emulated-ocs READMEs had drifted: hardcoded OCS port tables, a non-existent init_tables() wrapper, and missing source routing support. Sync the docs with the config-driven deployment flow and the new ETHERTYPE_OPTICS_SR / time_flow_table_source path.
- Update example .rst includes to the mininet_ prefixed paths - Add physical wiring ASCII diagrams for config_4tor and config_4tor_2link - Add dashboard-for-telemetry item to the hardware status table as TODO - Exclude tofino-backend-internals.md from the Sphinx build - Enable myst_heading_anchors so intra-page links resolve - Drop directory-only relative links that myst cannot resolve
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Apr 15, 2026
* Add Tofino2 hardware backend and refactor Mininet into backends/mininet/ Introduces openoptics/backends/tofino/ with SSH/SCP-based deployment, BFRt control plane, P4 sources for emulated OCS and openoptics-tor, and config-driven multi-ToR setup. Moves existing Mininet-specific P4 and BMv2 targets under openoptics/backends/mininet/ and prefixes the corresponding examples with mininet_. Refactors control-plane plumbing so backends consume structured TableEntry objects instead of BMv2 CLI strings, adds a supports_device_manager flag to gate Thrift setup, and extends routing/topology with HoHo optimal-substructure, VLB random sentinel, and guardband-aware schedules. Expands unit tests for the new routing and TableEntry plumbing. * Update Tofino backend READMEs to match current code The openoptics-tor and emulated-ocs READMEs had drifted: hardcoded OCS port tables, a non-existent init_tables() wrapper, and missing source routing support. Sync the docs with the config-driven deployment flow and the new ETHERTYPE_OPTICS_SR / time_flow_table_source path. * Update docs for Tofino backend and fix Sphinx build warnings - Update example .rst includes to the mininet_ prefixed paths - Add physical wiring ASCII diagrams for config_4tor and config_4tor_2link - Add dashboard-for-telemetry item to the hardware status table as TODO - Exclude tofino-backend-internals.md from the Sphinx build - Enable myst_heading_anchors so intra-page links resolve - Drop directory-only relative links that myst cannot resolve ---------
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Add Tofino2 hardware backend and refactor Mininet into backends/mininet/
New Tofino backend (openoptics/backends/tofino/):
parallel multi-ToR rollout
openoptics-tor data plane
with apply_secrets.py overlay for testbed-specific values
Mininet refactor:
Control-plane plumbing:
CLI strings
Tofino can skip it cleanly
Routing and topology:
from_schedule() and add_guardband() helpers
Testing:
TableEntry plumbing