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Network configurations

You can configure Lenovo XClarity Administrator to use one or two network interfaces.

Attention
  • Changing the XClarity Administrator IP address after managing devices might cause the devices to be placed in offline state in XClarity Administrator. Ensure that all devices are unmanaged before changing the IP address.
  • You can enable or disable checking for duplicate IP addresses in the same subnet by clicking the Duplicate IP address checking toggle. It is disabled by default. When enabled, XClarity Administrator raises an alert if you attempt to change the IP address of XClarity Administrator or manage a device that has the same IP address as another device that is under management or another device found in the same subnet.
    Note
    When enabled, XClarity Administrator runs an ARP scan to find active IPv4 devices on the same subnet. To prevent the ARP scan, disable Duplicate IP address checking.
  • When running XClarity Administrator as a virtual appliance, if the network interface for the management network is configured to use the Dynamic Host Configuration Protocol (DHCP), the management-interface IP address might change when the DHCP lease expires. If the IP address changes, you must unmanage the chassis, rack and tower servers, and then manage them again. To avoid this problem, either change the management interface to a static IP address, or ensure that the DHCP server configuration is set so that the DHCP address is based on a MAC address or that the DHCP lease does not expire.
  • If you do not intend to use XClarity Administrator to deploy operating system or update OS device drivers, you can disable Samba and Apache servers by changing the network interface to use the discover and manage hardware only option. Note that the management server is restarted after changing the network interface.
  • When running XClarity Administrator as a container, ensure that a macvlan network is set up on the host system..
XClarity Administrator has two separate network interfaces that can be defined for your environment, depending on the network topology that you implement. For virtual appliances, these networks are named eth0 and eth1. For containers, you can choose custom names.
  • When only one network interface (eth0) is present:
    • The interface must be configured to support the device discovery and management (such as server configuration and firmware updates). It must be able to communicate with the CMMs and Flex switches in each managed chassis, the baseboard management controller in each managed server, and each RackSwitch switch.
    • If you intend to acquire firmware and OS device-driver updates using XClarity Administrator, at least one of the network interfaces must be connected to the Internet, preferably through a firewall. Otherwise, you must import updates into the repository.
    • If you intend to collect service data or use automatic problem notification (including Call Home and Lenovo Upload Facility), at least one of the network interfaces must be connected to the Internet, preferably through a firewall.
    • If you intend to deploy operating-system images and update OS device drivers, the interface must have IP network connectivity to the server network interface that is used to access the host operating system.
      Note
      If you implemented a separate network for OS deployment and OS device-driver updates, you may configure the second network interface to connect to that network instead of the data network. However, if the operating system on each server does not have access to the data network, configure an additional interface on the servers to provide connectivity from the host operating system to the data network for OS deployment and OS device-driver updates, if needed.
  • When two network interfaces (eth0 and eth1) are present:
    • The first network interface (typically the Eth0 interface) must be connected to the management network and configured to support the device discovery and management (including server configuration and firmware updates. It must be able to communicate with the CMMs and Flex switches in each managed chassis, the management controller in each managed server, and each RackSwitch switch.
    • The second network interface (typically the eth1 interface) can be configured to communicate with an internal data network, a public data network, or both.
    • If you intend to acquire firmware and OS device-driver updates using XClarity Administrator, at least one of the network interfaces must be connected to the Internet, preferably through a firewall. Otherwise, you must import updates into the repository.
    • If you intend to collect service data or use automatic problem notification (including Call Home and Lenovo Upload Facility), at least one of the network interfaces must be connected to the Internet, preferably through a firewall.
    • If you intend to deploy operating-system images and update OS device drivers, you can choose to use either eth1 or eth0 interface. However, the interface that you use must have IP network connectivity to the server network interface that is used to access the host operating system.
      Note
      If you implemented a separate network for OS deployment and OS device-driver updates, you can configure the second network interface to connect to that network instead of the data network. However, if the operating system on each server does not have access to the data network, configure an additional interface on the servers to provide connectivity from the host operating system to the data network for OS deployment and OS device-driver updates, if needed.
The following table shows possible configurations for the XClarity Administrator network interfaces based on the type of network topology that has been implemented in your environment. Use this table to determine how to define each network interface.
Table 1. Role of each network interface based on network topology
Network topologyRole of interface 1 (eth0)Role of interface 2 (eth1)
Converged network (management and data network with support for OS deployment and OS device-driver updates)Management network
  • Discovery and management
  • Server configuration
  • Firmware updates
  • Service data collection
  • Automatic problem notification (such as Call Home and Lenovo Update Facility)
  • Warranty data retrieval
  • OS deployment
  • OS device-driver updates
None
Separate management network with support for OS deployment and OS device-driver updates and data networkManagement network
  • Discovery and management
  • Server configuration
  • Firmware updates
  • Service data collection
  • Automatic problem notification (such as Call Home and Lenovo Update Facility)
  • Warranty data retrieval
  • OS deployment
  • OS device-driver updates
Data network
  • None
Separate management network and data network with support for OS deployment and OS device-driver updatesManagement network
  • Discovery and management
  • Server configuration
  • Firmware updates
  • Service data collection
  • Automatic problem notification (such as Call Home and Lenovo Update Facility)
  • Warranty data retrieval
Data network
  • OS deployment
  • OS device-driver updates
Separate management network and data network without support for OS deployment and OS device-driver updatesManagement network
  • Discovery and management
  • Server configuration
  • Firmware updates
  • Service data collection
  • Automatic problem notification (such as Call Home and Lenovo Update Facility)
  • Warranty data retrieval
Data network
  • None
Management network only (OS deployment and OS device-driver updates is not supported)Management network
  • Discovery and management
  • Server configuration
  • Firmware updates
  • Service data collection
  • Automatic problem notification (such as Call Home and Lenovo Update Facility)
  • Warranty data retrieval
None
  • Single data and management network
    In this network topology, management communications, data communications, and operating-system deployment occur over the same network. This topology is referred to as a converged network.
  • Physically separate data and management network
    In this network topology, the management network and the data network are physically separate networks, and the operating-system deployment network is configured as part of either the management network or the data network.
  • Virtually separate data and management network
    In this topology, the data network and management network are virtually separate. Packets from the data network and packets from the management network are sent over the same physical connection. VLAN tagging is used on all management-network data packets to keep the traffic between the two networks separated.
  • Management-only network
    In this topology, Lenovo XClarity Administrator has access to only the management network. It does not have access to the data network. However, XClarity Administrator must have access to the operating-system deployment network if you intend to deploy operating-system images from XClarity Administrator to managed servers.