Added platform.json in Mellanox Spectrum-4 and older simx platforms #9621
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Signed-off-by: Raphael Tryster raphaelt@nvidia.com
Why I did it
Added missing functionality for dynamic buffer calculation in Spectrum-4.
How I did it
Added a section of code in asic_table.j2 for Spectrum-4, and added the simx version of SN5600 to the supported list.
How to verify it
Manually: buffershow -l should show all ingress/egress lossy/lossless pools, and all fields of profiles should show values.
Automatically: https://github.com/Azure/sonic-mgmt/blob/master/tests/qos/test_buffer.py
Which release branch to backport (provide reason below if selected)
Description for the changelog
Filled in Spectrum-4 support in asic_table.j2
A picture of a cute animal (not mandatory but encouraged)