The 7210 SAS-Mxp, 7210 SAS-R6, and 7210 SAS-R12 have a single buffer pool per node, the system pool. All the queues created by the system are allocated buffers from this system pool. Queues come up with default buffers, and the buffers change accordingly when they are associated with a network port or SAP. Queue management policies allow the user to specify the parameters that determine buffer allocation to the queues. Buffer pools cannot be created or deleted in the 7210 SAS.