FRR generates invalid BFD configuration after removing interfaces
Pull Request Review
If you create a BFD peer configuration and set the Interface option to a value other than "Default",
and then remove that interface, invalid config will be generated:
2021-03-14 15:18:33,463 ERROR: vtysh failed to process new configuration: vtysh (mark file) exited with status 2: b'line 132: % Unknown command: peer 192.168.88.99 local-address 192.168.88.41 interface \n\n'