Hi, We have 4 NIC controllers on ceph servers. Each server have installed few osd's and one monitor. How should we setup networking on this hosts with division on frontend network (10.20.8.0/22) and backend network (10.20.4.0/22)? At this time we are using this configuration of network: auto em1 iface em1 inet static address 10.20.8.30 netmask 255.255.252.0 gateway 10.20.8.1 dns-nameservers 8.8.8.8 8.8.4.4 auto em2 iface em2 inet static address 10.20.4.30 netmask 255.255.252.0 dns-nameservers 8.8.8.8 8.8.4.4 auto p4p1 iface p4p1 inet static address 10.20.4.31 netmask 255.255.252.0 dns-nameservers 8.8.8.8 8.8.4.4 auto p4p2 iface p4p2 inet static address 10.20.8.31 netmask 255.255.252.0 dns-nameservers 8.8.8.8 8.8.4.4 On the ceph.conf: ... [osd.16] cluster addr = 10.20.4.30 public addr = 10.20.8.30 [osd.17] cluster addr = 10.20.4.30 public addr = 10.20.8.30 [osd.18] cluster addr = 10.20.4.30 public addr = 10.20.8.30 [osd.19] cluster addr = 10.20.4.31 public addr = 10.20.8.31 [osd.20] cluster addr = 10.20.4.31 public addr = 10.20.8.31 [osd.21] cluster addr = 10.20.4.31 public addr = 10.20.8.31 ... [mon.ceph30] host = ceph30 mon addr = 10.20.8.30:6789 -- Regards, Mateusz