Symptoms:
When trying to replace TKGi API certificate in TKGi Management Console according to KB https://kb.vmware.com/s/article/89807 , Issue in Apply changes to Management Console Configuration due to incorrect floating IP range set in TKGi Configuration   

Error shown as follows: 

Fix floating IP range in TKGi MC with correct start IP and End IP as follows:
 

Please make sure that the summary page in the TKGI  MC is normal before changing the value of floating_ips_range as in screenshot below:​

Steps for changing floating IP range in TKGi MC as follows:

1. ssh to the TKGI MC VM.
2. `curl -k -u root -H “Content-Type: application/json” https://localhost/api/v1/deployment/manifest | jq -r . >manifest.json`
3. update floating_ips_range to expected value.
4. `curl -k -u root -H “Content-Type: application/json” -X POST -d @manifest.json https://localhost/api/v1/deployment`

• In TKGI MC Code,  TKGI MC will created a new floating IP pool with same name if the floating ip ranges is changed, and also TKGI MC will deleted the old floating IP pool.
• Normally Users cannot Edit the floating IP Range so the above procedures need to proceeded under Engineering Guidance