Nokia 7210 SAS-M - Page 559

7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
Configuration Guide
System Management
Edition: 01 3HE 16132 AAAB TQZZA 559
mbs-pool
Syntax mbs-pool {node | port}
Context configure>system>resource-profile>qos
Supported
Platforms
7210 SAS-T (network and access-uplink)
Description On 7210 SAS-T, the user has an option to configure the MBS pool per node or per port. This
command allows the user to configure the MBS pool as per their requirement. A reboot is
needed whenever the value of this parameter is changed for the new values to take effect.
If the users configure a per node MBS pool, then each of the 8 queues available on a port is
allocated a CBS amount of committed buffers. The remaining amount of buffers is allocated
towards the MBS pool that is available for sharing among all the queues across all the ports
of the node. In other words the MBS pool is per node.
If the users configure a per port MBS pool, the available buffers are equally divided up among
the all the ports of the node. With this scheme of allocation, each port gets some portion of
the buffers for its exclusive use. Some of these buffers are allocated towards the CBS per
queue and the rest is assigned to the per port MBS pool. To allow operators better control
over which ports get larger portion of queue buffers, operator is provided with an option to
decommission ports. The commands associated with decommissioning of ports are only
allowed when the node is booted with the option to use per-port MBS pool. In other words,
decommission entries are executed only if the mbs-pool parameter is set to port.
If the mbs-pool parameter is set to node and decommission entries are configured, then an
error should be reported. All decommission entries must be removed if the mbs-pool
parameter needs to be changed from port to node.
Default node
Parameters node — Keyword to use per-node MBS pool.
port — Keyword to use per-port MBS pool, along with an option to relocate buffers to
ports that need better burst handling capability using the decommissioning
commands.
port-scheduler-mode
Syntax port-scheduler-mode
no port-scheduler-mode
Context config>system>resource-profile>qos
Supported
Platforms
7210 SAS-Mxp