Hi, This is issue with CephFS snapshot mirroring setup between two clusters and would appreciate your assistance. Environment: * Primary Cluster: Ceph 15.2.13/16.2.5 (mixed versions) [cid:image001.png@01DCD199.2933E2E0] * Backup Cluster: Ceph 17.2.7/18.2.7 (mixed versions) [cid:image002.png@01DCD199.2933E2E0] * Filesystem: cephfs * Issue: Unable to import peer bootstrap token Problem Description: When attempting to import a peer bootstrap token using: ceph fs snapshot mirror peer_bootstrap import cephfs <token> I receive the error: Error EEXIST: already an active peer mgr.server reply reply (17) File exists already an active peer However, ceph fs snapshot mirror peer_list cephfs returns an empty list [], indicating no peers are configured. Steps Performed: Initial Setup: 1. Enabled mirroring module: ceph mgr module enable mirroring 2. Deployed cephfs-mirror service: ceph orch apply cephfs-mirror 3. Enabled mirroring on filesystem: ceph fs snapshot mirror enable cephfs 4. Created remote user and bootstrap token on backup cluster 5. Verified mirroring daemons are running: ceph fs snapshot mirror daemon status Troubleshooting Attempts: 1. Reset filesystem mirroring: ceph fs snapshot mirror disable cephfs ceph fs snapshot mirror enable cephfs 2. Module reset: ceph mgr module disable mirroring ceph mgr module enable mirroring 3. Service recreation: ceph orch rm cephfs-mirror ceph orch apply cephfs-mirror 4. Checked for stale configuration: o ceph config-key ls | grep mirror shows: mgr/cephadm/spec.cephfs-mirror o ceph fs snapshot mirror dirmap cephfs returns empty o ceph fs snapshot mirror status cephfs shows no active mirroring Current Status: * Mirroring daemons: Running and visible in daemon status * Peer list: Empty [] * Filesystem mirroring: Enabled * Error persists: EEXIST despite no visible peers Diagnostic Information: * MGR logs show: mgr.server reply reply (17) File exists already an active peer * No connectivity issues between clusters (ports 6789, 3300, 6800+ tested) * Both clusters are healthy with no other issues Regards, Anantha