dokucama

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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):

1. ipinfusion
2. mikrotec
3. cumulus
4. SONIC (Software for Open Network in the Cloud. Azure uses it)

Note that ODM (Original Design Manufacturing) vs OEM (Original Equipment Manufacturer):

1. OEM or the Original Equipment Manufacturer designs a product based on the buyer’s specifications.
2. 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 link Current ASICs:

1. Broadcom
   1. Tomahawk-3 : discontinued except for Hyperscalers
   2. Trident : more for Enterprise
   3. Jericho2 : more for ISPs. ToR switches
      1. buffer-oriented, more programmable
2. Intel:
   1. Barefoot
      1. P4
   2. Tofino
3. Mellanox
4. OVM Teralinks
5. Marvell-prestera
6. Cavium

1. Netronome

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

• ASIC 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:

1. Cisco : Viptela
2. mycompany2 : Talari
3. Junper : OPENCONTRAIL : TUGSTEN (check these projects): micro backplane

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DISAGGREGATION:

HAL (for forwardig):

• 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)