First, sorry if this question has already been asked/answered - I've searched but perhaps I haven't recognised the answer....

What we have is a cluster of servers which need to access a single remote server using sftp.

We are migrating from one remote server to another at the same (remote) location.

We also want to refresh the public/private key pairs on the configuration as part of an ongoing security review.

My question is - can we have multiple public/private key pairs for the same user between server A and server B?

I want to do this to allow for cutover testing - but am concerned that the software checking keys may only try one of each type (rsa/dsa?) before rejecting the connection method and moving to the next type of key.

Hope it's a straightforward question - please let me know if I need to supply more details.

Thanks in advance

Bruce