added files to create SKU Mellanox-SN3800-C64

[madhanmellanox]

• What I did
  Created all the relevant files to modify SKU Mellanox-SN3800-C64

• How I did it
  Created all the SKU related files using a XML file provided and a sonic_sku_create.py script to generate the files.

• How to verify it
  Load the new HWKU related config using follow command and reload the config.
  sudo sonic-cfggen --preset l2 -p -H -k Mellanox-SN3800-C64 > /tmp/newconfig
  sudo cp /tmp/newconfig /etc/sonic/config_db.json
  sudo config reload
  show interfaces status

• Description for the changelog
  Created SKU related files buffers_defaults_t0.j2, buffers_defaults_t1.j2, buffers.json.j2, pg_profile_lookup.ini, port_config.ini, qos.json.j2, sai_3800.xml and sai.profile.

- A picture of a cute animal (not mandatory but encouraged)

[prsunny]

I thought this is same as ACS-MSN3800 and this should only be a "symlink". I believe you duplicated all files from ACS-MSN3800 or is it different?

[prsunny]

Please check comment

[madhanmellanox]

I thought this is same as ACS-MSN3800 and this should only be a "symlink". I believe you duplicated all files from ACS-MSN3800 or is it different?

It is same as files of ACS-MSN3800. But, when we create symlink and then try to set the HWSKU on the switch, it does not work properly. That is why I created physical files instead of symlinks.

[prsunny]

I thought this is same as ACS-MSN3800 and this should only be a "symlink". I believe you duplicated all files from ACS-MSN3800 or is it different?

It is same as files of ACS-MSN3800. But, when we create symlink and then try to set the HWSKU on the switch, it does not work properly. That is why I created physical files instead of symlinks.

Please check this - Mellanox-SN2700 is a symlink

[prsunny]

Why is it not a symlink?

[madhanmellanox]

Why is it not a symlink?

Nowhere in the SKUs, port_config.ini, sai.profile, sai_xxx.xml is a symlink. Otherwise, we will have problems loading the HWSKU. Rest of all other files, I have made it as symlink.

[prsunny]

Why is it not a symlink?

Nowhere in the SKUs, port_config.ini, sai.profile, sai_xxx.xml is a symlink. Otherwise, we will have problems loading the HWSKU. Rest of all other files, I have made it as symlink.

Did you check the link I shared for 2700? How is that working?

[madhanmellanox]

Not sure, if the whole directory is itself a symlink. I will modify my fix to be the same.

[prsunny]

@sschlafman, can you sign off?

[madhanmellanox]

retest vsimage please

[prsunny]

Looks different from this PR - can you confirm it is working with the symlink?