Partition Key (P_Key)
Definition of a Partition
A partition is defined as a collection of CA, router, and switch ports that are permitted to communicate with one another. A port may be a member of multiple partitions simultaneously.
Who Enrolls a Port in a Partition?
Refer to Figure 16-1 on page 322. A partition is represented by a 15-bit partition ID. Theoretically, this permits up to 32K partitions to be set up. Partition values assigned to a port are stored in the port's P_KeyTable attribute. The attribute consists of a series of P_Key entries.
Figure 16-1. P_Key Format
One or more P_Keys are assigned to a port by the subnet's PM (Partition ...