Meeting Notes, 2021 07 08

DENT Roadmap and Feature Working Group

Date --- 2021 July 8 Zoom meeting --- https://zoom.us/meeting/register/tJMod-yvrD4rHtNIpPTosVOj571ECS_lrf8j

Attendees

• Jon Polom (Department of Defense; research engineer)
• Andrew Dunn (Department of Defense; research engineer)
• Robert Marko (Sartura; kernel devel)
• Luka Perkov (Sartura; principal)
• Jakov Petrina (Sartura; build system)
• Victor Tkachenko (NAG; lead engineer/product manager)
• Kishore Atreya (Marvell PLM)
• Taras Chornyi (PL Vision; switchdev developer)
• Steve Noble (amazon; DENT TSC lead)
• Sandeep Nagaraja (amazon; lead engineer)
• Michael Lane (amazon; principle TPM)
• Trishan de Lanerolle (Linux Foundation;TPM/Community lead for DENT)
• Celement Chang (Delta; BSP developer)
• Mingxi Kao (Alpha Networks)
• Richard Herwig (Whole Foods; bare metal switching)
• Lawrence Liao (Delta)
• Manodipto Ghose (Testing Working Group)
• Mike Ward (Accton)
• Moti Nisim (Marvell)
• Mickey Rachamim
• Robert Perry
• Naresh Kumar
• Krishnamurthy Mayya
• Moni Levy (nvidia)
• Jan Lubbe

Agenda

• New topics
  • DHCP Snooping
• Open items
  • Improve the user experience for configuring 802.1x authenticator
    • Initially proposed solution is "verbose" and perhaps unintuitive, look to derive more elegant solution
  • Targeting DENT 3.0 for Prestera switchdev driver to be able to offload Ether type filtering
    • Current state: nftables ether type filtering isn't offloaded right now
  • Maximum MAC addresses per interface not supported in kernel
    • Forwarding database controlled by bridge driver, can't limit MAC addresses
    • Kernel won't see bridged L2 traffic
    • Needs 2 stages of support:
      • kernel bridge driver
      • switchdev interface for ASIC
  • Package management
    • Publish an image tailored to evaluation or development and include a package manager
    • Production images should be generated for end-use requirements with needed packages, likely without package manager
    • Bring question to next TSC meeting
  • Containerized workloads
    • What container engines and runtimes are supported?
      • podman, docker, lxc/lxd
    • Limitation: not for low resource systems
    • Limitation: can't add switch ports to container unless container in host namespace
  • Configuration and Use Documentation
    • Feature use guides
    • Image build guide
    • Sartura has developed some documentation for Replica and would appreciate a decision from DENT project whether Replica will be next build system for DENT before allocating significant resources to documentation.
  • System reset feature
    • Revert all use imposed changes back to state when image first loaded
  • Dual partitions needed for certain applications (ex: CPE)
    • two OS installs, update one and boot with fallback
    • inspired by desire to update from one NOS to another NOS
    • probably an edge case not a priority for support?
  • Configuration persistence
    • persistence across full image upgrades
    • Sartura has basic configuration persistence system written for replica
  • System update
    • Support both full image and package based updates
    • Sartura replica has built in whole image system updater, not dependent on ONIE
  • Develop minimum list of features that switchdev drivers should have in order to provide proper experience with dentOS on a switch
    • nvidia wiki is up to date
    • Marvell needs to update wiki to reflect current driver features in DENT

Actions

• Delta to provide POE controller software specification
• Amazon to supply PoE daemon requirements (Steve Noble)
• Need to develop specification for 802.1x driver portion
• Update build system evaluation rubric with update and deployment process support criteria
  • image based
  • package based
• Develop vendor agnostic driver feature requirements list
• Marvell will update Prestera Switchdev wiki with current features (Moti)