Hi, I setup a small 3 node cluster as a POC. I bootstrapped the cluster with separate networks for frontend (public network 192.168.30.0/24) and backend (cluster network 192.168.41.0/24). 1st small question: After the bootstrap, I recognized that I had mixed up cluster and public network. :( Is there a way to fix this on a running cluster? Last resort I would rebuild the cluster. Never the less I can't mount cephfs on a Linux client using any of the two networks. My linux client is CentOS 7 (latest updates) and has 3 nics, two of them in one of the public and cluster networks. I bootstrapped the cluster using the following conf file to have two networks: /root/ceph.conf: [global]  public network = 192.168.41.0/24  cluster network = 192.168.30.0/24 cephadm bootstrap -c /root/ceph.conf --mon-ip 192.168.30.11 I have 2 mons, one running on the bootstrap host (192.168.30.11 / 192.168.41.11) and one (gedaopl01 192.168.30.12/ 192.168.41.12) running on one of the 3 osds: [root@gedasvl02 ~]# ceph -s   cluster:     id:     dad3c9fa-1ec7-11eb-94d6-005056b703af     health: HEALTH_OK   services:     mon: 2 daemons, quorum gedasvl02,gedaopl01 (age 5h)     mgr: gedasvl02.cspuee(active, since 12h), standbys: gedaopl01.llogef     mds: cephfs:1 {0=cephfs.gedaopl03.prrkll=up:active} 1 up:standby     osd: 3 osds: 3 up (since 11h), 3 in (since 11h)   task status:     scrub status:         mds.cephfs.gedaopl03.prrkll: idle   data:     pools:   3 pools, 81 pgs     objects: 29 objects, 2.2 KiB     usage:   450 GiB used, 407 GiB / 857 GiB avail     pgs:     81 active+clean [root@gedasvl02 ~]# ceph osd metadata 2 | grep addr     "back_addr": "[v2:192.168.30.12:6800/3112350288,v1:192.168.30.12:6801/3112350288]",     "front_addr": "[v2:192.168.41.12:6800/3112350288,v1:192.168.41.12:6801/3112350288]",     "hb_back_addr": "[v2:192.168.30.12:6802/3112350288,v1:192.168.30.12:6803/3112350288]",     "hb_front_addr": "[v2:192.168.41.12:6802/3112350288,v1:192.168.41.12:6803/3112350288]", Now when I try to mount cephfs from the linux client, the mount command is just stuck and runs into a timeout. I can ping the mon from the client on both IPs, public (192.168.41.12) and cluster (192.168.30.12) and I can also see packets coming in on the mon using tcpdump. What could be wrong here? I'm using fuse-cephfs. One more question regarding rebuilding the cluster using cephadm, is there a simple tear-down command? My bootstrap host is a VM so I can use snapshots, but the nodes I have to clean manually, by removing all pods and ceph directories. Best Regards, Oliver