Administrator Guide

dot1p Value in
the Incoming
Frame
Egress Queue Assignment
2 2
3 3
4 4
5 5
6 6
7 7
Dell#show qos dot1p-queue-mapping
Dot1p Priority : 0 1 2 3 4 5 6 7
Queue : 1 0 2 3 4 5 6 7
SNMP Support for PFC and Buffer Statistics
Tracking
Buffer Statistics Tracking (BST) feature provides a mechanism to aid in Resource Monitoring and Tuning of Buffer Allocation. Max Use
Count mode in Buffer Statistics is supported. Max Use Count mode provides the maximum value of the counters accumulated over a
period of time.
Priority Flow Control (PFC) provides a link level flow control mechanism, which is controlled independently for each frame priority. The
goal of this mechanism is to ensure zero loss under congestion in DCB networks.
The SNMP support for monitoring PFC and BST counters and statistics is supported. The enhancement is made on F10-FPSTATS MIB
with additional tables to display the PFC and BST counters and statistics.
The following new tables are supported in F10-FPSTATS MIB
• fpEgrQBuffSnapshotTable
• fpIngPgBuffSnapshotTable
• fpStatsPerPgTable
• pfcPerPrioTable
fpEgrQBuffSnaps
hotTable
This table fetches the BST statistics at Egress Port with respect to the buffer used. This table displays the
Snapshot of the Buffer cells used by Unicast and Multicast Data and Control Queues.
fpIngPgBuffSnaps
hotTable
This table fetches the BST statistics at the Ingress Port with respect to the Shared Cells and the Headroom cells
used per Priority Group. The snapshot of the Ingress Shared cells used and the Ingress Headroom cells used per
Priority Group, when PFC is enabled, will be displayed in this table. This table is indexed by stack-unit index, port
number and the priority group number.
fpStatsPerPgTabl
e
This table fetches the Allocated Min cells, Shared cells and Headroom cells per Priority Group, the mode in which
the buffer cells are allocated - Static or Dynamic and the Used Min Cells, Shared cells and Headroom cells per
Priority Group. The table fetches a value of 0 if the mode of allocation is Static and a value of 1 if the mode of
allocation is Dynamic. This table is indexed by stack-unit number, port number and priority group number.
pfcPerPrioTable This table fetches the number of PFC frames transmitted (PFC Requests) and the number of PFC frames
received (PFC Indications) per priority on a per port basis. This table is indexed by the stack-unit index, port
number and priority.
Data Center Bridging (DCB) 239