Node configuration details
Apply these configuration details to nodes to ensure that you have a valid configuration.
Host bus adapters and node canisters
Supported number of adapters | Ports | Protocol | Possible slots |
---|---|---|---|
0-2 | 4 | 32 Gb Fibre Channel | 1,2 |
0-2 | 4 | 16 Gb Fibre Channel | 1,2 |
0-2 | 2 | 25 Gb Ethernet (iWARP) | 1,2 |
0-2 | 2 | 25 Gb Ethernet (RoCE) | 1,2 |
0-3 | 2 | 100 Gb Ethernet (RoCE) | Slot 1- Cage 1 left Slot 5- Cage 2 left Slot 7- Cage 3 left |
0-1 in slot 1 only | 2 (4-port adapter but only 2 ports are active.) | 12 Gb SAS Expansion | 1 |
On-board Ethernet port | Speed | Functions |
---|---|---|
1 | 10 GbE | Management IP, Service IP, Host I/O |
2 | 10 GbE | Secondary Management IP, Host I/O |
3 | 10 GbE | Host I/O |
4 | 10 GbE | Host I/O |
1 GbE | Technician Port - DHCP/DNS for direct attach service management |
For information about supported hardware, see the following website: www.ibm.com/support.
Volumes
Each volume is accessible from the two nodes in an I/O group. Each host network port can recognize up to eight paths to each logical unit (LU) that is presented by the system. The hosts must run a multipathing device driver before the multiple paths can resolve to a single device. You can use fabric zoning, VLANs, or port masking to reduce the number of paths to a volume that are visible by the host. The network port types are Ethernet (iSCSI), Fibre Channel, and Fibre Channel over Ethernet.
Optical connections
Optical fiber connections can be used between a node and its switches.
Systems that use the intersystem Metro Mirror and Global Mirror functions can use optical fiber connections between the switches, or they can use distance-extender technology that is supported by the switch manufacturer.
Fibre Channel connection
The system supports shortwave and longwave Fibre Channel connections between nodes and the switches to which they are connected by using the 16 Gbps and 32 Gbps Fibre Channel adapter.
No ISL hops are permitted among the nodes within the same I/O group. However, no more than three ISL hops are permitted among nodes that are in the same system though different I/O groups. If your configuration requires more than three ISL hops for nodes that are in the same system but in different I/O groups, contact your support center.
Avoid communication between nodes and storage systems that are being routed across ISLs. To do so, connect all storage systems to the same Fibre Channel or FCF switches as the nodes. One ISL hop between the nodes and the storage systems is permitted. If your configuration requires more than one ISL, contact your support center.
In larger configurations, it is common to have ISLs between host systems and the nodes.