Determining which Fibre Channel ports to use for Fibre Channel disk shelf connections
Before cabling your HA pair , you need to identify which Fibre Channel ports to use to connect your disk shelves to each storage system, and in what order to connect them.
Keep the following guidelines in mind when identifying ports to use:
Every disk shelf loop in the HA pair requires two ports on the node, one for the primary connection and one for the redundant multipath HA connection.
A standard HA pair with one loop for each node uses four ports on each node.
- Onboard Fibre Channel ports should be used before using ports on expansion adapters.
Always use the expansion slots in the order shown in the Hardware Universe at hwu.netapp.com for your platform for an HA pair .
- If using Fibre Channel HBAs, insert the adapters in the same slots on both systems.
See the Hardware Universe at hwu.netapp.com to obtain all slot assignment information for the various adapters you use to cable your HA pair .
After identifying the ports, you should have a numbered list of Fibre Channel ports for both nodes, starting with Port 1.
Cabling guidelines for a quad-port Fibre Channel HBA
If using ports on the quad-port, 4-Gb Fibre Channel HBAs, use the procedures in the following sections, with the following additional guidelines:
- Disk shelf loops using ESH4 modules must be cabled to the quad-port HBA first.
- Disk shelf loops using AT-FCX modules must be cabled to dual-port HBA ports or onboard ports before using ports on the quad-port HBA.
- Port A of the HBA must be cabled to the In port of Channel A of the first disk shelf in the loop.
Port A of the partner node's HBA must be cabled to the In port of Channel B of the first disk shelf in the loop. This ensures that disk names are the same for both nodes.
- Additional disk shelf loops must be cabled sequentially with the HBA’s ports.
Port A is used for the first loop, port B for the second loop, and so on.
- If available, ports C or D must be used for the redundant multipath HA connection after cabling all remaining disk shelf loops.
- All other cabling rules described in the documentation for the HBA and the Hardware Universe must be observed.