• fpIngPgBuffSnapshotTable• fpStatsPerPgTable• pfcPerPrioTablefpEgrQBuffSnapshotTableThis table fetches the BST statistics at Egress Port with respect to the buffer used. Thistable displays the Snapshot of the Buffer cells used by Unicast and Multicast Data andControl Queues.fpIngPgBuffSnapshotTableThis table fetches the BST statistics at the Ingress Port with respect to the Shared Cellsand the Headroom cells used per Priority Group. The snapshot of the Ingress Sharedcells used and the Ingress Headroom cells used per Priority Group, when PFC isenabled, will be displayed in this table. This table is indexed by stack-unit index, portnumber and the priority group number.fpStatsPerPgTable This table fetches the Allocated Min cells, Shared cells and Headroom cells per PriorityGroup, the mode in which the buffer cells are allocated - Static or Dynamic and theUsed Min Cells, Shared cells and Headroom cells per Priority Group. The table fetches avalue of 0 if the mode of allocation is Static and a value of 1 if the mode of allocation isDynamic. This table is indexed by stack-unit number, port number and priority groupnumber.pfcPerPrioTable This table fetches the number of PFC frames transmitted (PFC Requests) and thenumber of PFC frames received (PFC Indications) per priority on a per port basis. Thistable is indexed by the stack-unit index, port number and priority.DCB Maps and its AttributesThis topic contains the following sections that describe how to configure a DCB map, apply the configuredDCB map to a port, configure PFC without a DCB map, and configure lossless queues.DCB Map: Configuration ProcedureA DCB map consists of PFC and ETS parameters. By default, PFC is not enabled on any 802.1p priority andETS allocates equal bandwidth to each priority. To configure user-defined PFC and ETS settings, you mustcreate a DCB map. The following is an overview of the steps involved in configuring DCB.1 Enter global configuration mode to create a DCB map or edit PFC and ETS settings.2 Configure the PFC setting (on or off) and the ETS bandwidth percentage allocated to traffic in eachpriority group, or whether the priority group traffic should be handled with strict priority scheduling. Youcan enable PFC on a maximum of 4 priority queues on an interface. Enabling PFC for dot1p prioritiesmakes the corresponding port queue lossless. The sum of all allocated bandwidth percentages in allgroups in the DCB map must be 100%. Strict-priority traffic is serviced first. Afterwards, you canconfigure either the peak rates or the committed rates. The bandwidth allocated to other priority groupsis made available and allocated according to the specified percentages. If a priority group does not useits allocated bandwidth, the unused bandwidth is made available to other priority groups.3 Repeat the above procedure to configure PFC and ETS traffic handling for each priority group4 Specify the dot1p priority-to-priority group mapping for each priority. The priority group range is from 0to 7. All priorities that map to the same queue must be in the same priority group.Data Center Bridging (DCB) 298
