[[https://resource.nvidia.com/cheatsheets/linux-networking-cheatsheet-quickstart|cheatsheet]]



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Install packages:
  sudo -E apt-get update
  sudo apt-get install iperf
  

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CUMULUS MULTICAST:
  net add interface swp1 igmp join  224.10.2.1  # for an interface to join a group
  net add pim rp 10.1.0.5 224.10.2.0/24
  ! The above works and 'net show mroute' shows state


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It can be run in ODM boxes(original design manufacturers):
  * Quanta
  * Delta
  * Edgecore
  * Accton
  * Alpha Networks
  * Penguin computing
  * NVIDIA>Mellanox>Cumulus (so now so cumulus no access to Broadcom)

These are vendors that nornmally run directly on ODM machines (besides from the incumbent ones):
  - ipinfusion
  - mikrotec
  - cumulus
  - SONIC (Software for Open Network in the Cloud. Azure uses it)

Note that **ODM (Original Design Manufacturing)** vs OEM (Original Equipment Manufacturer): 
  - OEM or the Original Equipment Manufacturer designs a product based on the buyer’s specifications. 
  - ODM or the Original Design Manufacturer designs and manufactures products on their own.

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Openswitch: uses db model instead of ephemeral message bus.\\
Hardware: Acton switches [[http://www.accton.com/|link]]
Current ASICs:
  - Broadcom
    - [[https://en.wikipedia.org/wiki/Broadcom_Corporation#Tomahawk-3_Chip|Tomahawk-3]]  : discontinued except for Hyperscalers
    - Trident : more for Enterprise
    - Jericho2 : more for ISPs. ToR switches 
      - buffer-oriented, more programmable
  - Intel:
    - [[http://packetpushers.net/barefoot-networks-announces-first-switches-programmable-tofino-chip/|Barefoot]]
      - P4
    - Tofino
  - Mellanox
  - OVM Teralinks
  - Marvell-prestera
  - Cavium

  - Netronome

Ownership: NVidia > Mellanox > Cumulus (so cumulus cannot use broadcom anymore)\
Nvidia: cpu less important. GPU, TPU (for tensors (AI))

  * ASIC [[https://blog.ipspace.net/2022/06/data-center-switching-asic-tradeoffs.html|considerations]]:
    * Buffer space
    * Forwarding table size
      * On-chip table vs On-chip TCAM
    * Forwarding features
      * performance
    * Programmable forwarding pipeline
      * P4
      * recirculation for vxlan?

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SDN NOTES:
  - Cisco : Viptela
  - mycompany2 : Talari
  - Junper : OPENCONTRAIL : TUGSTEN (check these projects): micro backplane


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__DISAGGREGATION__:\\

HAL 
(for forwarding):
  * SAI (ms, set of apis to talk to the fwd hardware. compatible but one step more)
  * switchdev (part of the linux kernel but currently (2022) only Mellanox hardware supports it)