Hi Leela,
You need to check the below things.
1. is the hostname of your migrated hardware has changed?
2. is public IP has also got changed?
If both are changing , then you have to register the hostname and public IP in SMP by raising a OSS note.
if the hostname and IP are not getting change , then you can use the existing local.pse file for the saprouter.
Kindly paste the error if the above conditions are true?
With Regards
Ashutosh Chaturvedi