Storwize V7000 Gen2 and Storwize V7000 Gen2+ Worldwide node and port names

The WWPN numbering scheme that is employed on Storwize® V7000 Gen2 and Storwize V7000 Gen2+ node canisters helps you easily identify which physical ports are connected to your SAN.

WWPNs are assigned to Fibre Channel (FC) and Fibre Channel over Ethernet (FCoE) port options that are installed in the adapter slots of the node canisters. Each WWNN and WWPN is composed from the components that are described in Table 1.

Table 1. Worldwide name components for Storwize V7000 Gen2
	Common prefix	Slot number	Port number	Node-specific portion
Value	5005 0768 0b	`S`	`P`	`XXXX`
Meaning	A fixed prefix	The slot number that contains the adapter providing the port. The number can be 2 or 3. This matches the marking above the adapter slots on the rear of the node canisters.	The port number on the adapter, which can be 1, 2, 3 or 4. These port numbers are numbered from top to bottom when you view a node canister that is installed in its enclosure.	A unique value that is assigned to each node canister slot manufactured. For canister slot one of an enclosure, this is an even value. For canister slot two, it is the next (odd) value up.

The WWNN of each node canister is obtained by setting the slot number and port number components to zero. Some example WWPNs are described in this table.

Table 2. Examples of Storwize V7000 Gen2 WWPNs in an enclosure
Node canister	Slot number	Port	WWPN
1	2	4	5005 0768 0b24 01a4
2	3	2	5005 0768 0b32 01a5

When a host is cabled directly to a Fibre Channel port of a Storwize V7000 Gen2 node canister, other similarly formatted WWPNs are exposed by the Fibre Channel services that are necessary for direct attachment.

If you upgrade node canisters and the I/O adapters are different types, the WWPNs of all ports might no longer correspond to the physical location of the ports. For example, if two 2-port FC adapters are replaced with a single 4-port adapter, the original WWPNs are preserved but the two new WWPNs are in different physical locations. You can change the WWPN assignment by specifying satask chvpd -fcportmap.