You are here: PS Series Group Administration > Member Management > Managing the Member Network Configuration
A array must have at least one functioning network interface connected to a network and configured with an IP address. Each control module has three Ethernet ports, labeled 0, 1, and 2, for a maximum of three active network connections.
Make sure you have at least one (and preferably three) network connections to the active control module. You should also have at least one (and preferably three) network connections to the secondary control module, in case the active control module fails.
All the normal network rules apply to members in a PS Series group, as described in Table 1: Network Requirements and Recommendations.
Note: If you experience network problems, group members may lose the ability to communicate with each other over the network. In such a group, some management operations are not allowed. For example, you cannot change the IP addresses of an isolated member.
If the group gets into a state where members lose communication, identify the network problems that caused it and fix them. This will restore the group to normal full operation, including network communication.
Member network configuration topics include the following: