Network configuration requirements

Use this information for IBM Storage Ceph network configuration requirements.

The recommended IBM Storage Ceph configuration is as follows:

• You must have two separate networks, one public network and one private network.
• You must have three different datacenters that support VLANS and subnets for Cephs private and public network for all datacenters.
  Note: You can use different subnets for each of the datacenters.
• The latencies between the two datacenters running the IBM Storage Ceph Object Storage Devices (OSDs) cannot exceed 10 ms RTT. For the arbiter datacenter, this was tested with values as high up to 100 ms RTT to the other two OSD datacenters.

Here is an example of a basic network configuration that are used in the documentation:

• DC1: Ceph public/private network: 10.0.40.0/24
• DC2: Ceph public/private network: 10.0.40.0/24
• DC3: Ceph public/private network: 10.0.40.0/24

For more information on the required IBM Storage Ceph network environment, see Configuring > Ceph network configuration within the IBM Storage Ceph documentation.