...

1. Save any special interface configs: curl -ks -H "Authorization: Bearer $JWT_AUTH_TOKEN" ${CNAASURL}/api/v1.0/device/currentswitch/interfaces > migrate-received.json
2. Remove device from NMS (use factory default if the switch is still online to clear the config)
3. ZTP new switch (with same name)
4. Re-apply any interface configs, download migrate-interfaces.py ( compatible with nms v1.x to convert output json to input json )
   
   1. python3 migrate-interfaces.py < migrate-received.json > migrate-send.json
   2. curl ks -H "Authorization: Bearer $JWT_AUTH_TOKEN" ${CNAASURL}/api/v1.0/device/newswitch/interfaces -X PUT -d migrate-send.json -H "Content-Type: application/json"
5. Sync config to switch
6. Update serial etc in NI?
7. Update monitoring etc if management IP changed

Replace access switch that is part of MLAG pair:

1. Same as access, save interface configs and remove device.
2. To be able to ZTP new device: set downlink on connected dist to redundant_link: false and sync it, shut down MLAG peer interfaces on the working switch, then do ZTP of new switch with same name as replaced switch
3. Import interfaces from step 1 (same as access switch)
4. Manually add back linknets between existing MLAG switch and new MLAG switch via API POST to /linknets with JSON payload: {"device_a": "a3", "device_b": "a4", "device_a_port": "Ethernet25", "device_b_port": "Ethernet51"}
5. Sync the working MLAG peer switch, it should re-enable MLAG peer interfaces that was shutdown previously
6. Sync the newly provisioned MLAG switch, it should add the mlag configuration
7. Remove redundant_link: false from connected dist switch again (from step 2)
8. Sync uplink dist switches

Replace dist switch (in core/dist configuration) via ZTP:

...

1. Power on replacement-switch in lab-rack or similar with console access
2. Connect via console and do "zerotouch cancel" if needed
3. Copy configuration from old switch from NMS WebUI Devices → Click on device → Actions menu → Copy generated config
4. Paste config to replacement switch, if it already has some previous config do configure session → rollback clean-config before pasting new config (paste with delay between lines or paste in chunks if configuration is not applied correctly)
5. wr config
6. Physically replace switch
7. Sync device from NMS WebUI
8. Update facts from NMS WebUI, update serial in NI etc