[202211][config reload]Config Reload Enhancement #15334
Merged
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Backporting #13969
Why I did it
Implementing code changes for sonic-net/SONiC#1203
Work item tracking
How I did it
Removed the timers and delayed target since the delayed services would start based on event driven approach.
Cleared port table during config reload and cold reboot scenario.
Modified yang model, init_cfg.json to change has_timer to delayed
How to verify it
Added UT to verify
Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)