Buffer pools cannot be created or deleted. The egress buffer pools are distributed as network egress buffer pools for access-uplink ports and access egress buffer pools for access ports. Based on the maximum number of ports to be supported for access and network, the total buffer is distributed into the access egress buffer pool and the network egress buffer pool.
The distribution of the buffers into access and network egress pools take care of the buffer requirements at the port level for various queue shaping and scheduling mechanisms and for various packet sizes varying from 64 bytes to jumbo frames. Each port on the system gets an equal portion of the available buffers. From the buffers allocated to a port, each queue gets its CBS amount of buffers. The remaining buffers are allocated toward the shared MBS pool per port. All the queues of the port can use the buffers from the shared MBS pool and it allows the queue to absorb larger bursts if other queues are not bursting simultaneously.
In addition, for 7210 SAS-Dxp in per-port MBS pool mode, an option is provided to decommission the port and allocate its buffers toward other ports.