Dell S4048T, Configuration Manual

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Field Description
Peer DCBx Status: DCBx Max Version Supported Highest DCBx version supported in Control TLVs
received from peer device.
Peer DCBx Status: Sequence Number Sequence number transmitted in Control TLVs
received from peer device.
Peer DCBx Status: Acknowledgment Number Acknowledgement number transmitted in Control
TLVs received from peer device.
Total DCBx Frames transmitted Number of DCBx frames sent from local port.
Total DCBx Frames received Number of DCBx frames received from remote peer
port.
Total DCBx Frame errors Number of DCBx frames with errors received.
Total DCBx Frames unrecognized Number of unrecognizable DCBx frames received.
QoS dot1p Traffic Classification and
Queue Assignment
The following section describes QoS dot1P traffic classification and assignments.
DCB supports PFC, ETS, and DCBx to handle converged Ethernet traffic that is assigned to an egress queue
according to the following QoS methods:
Honor dot1p You can honor dot1p priorities in ingress traffic at the port or global switch level (refer
to Default dot1p to Queue Mapping) using the
service-class dynamic dot1p
command in INTERFACE configuration mode.
Layer 2 class maps You can use dot1p priorities to classify traffic in a class map and apply a service policy
to an ingress port to map traffic to egress queues.
NOTE: Dell Networking does not recommend mapping all ingress traffic to a single queue when using
PFC and ETS. However, Dell Networking does recommend using Ingress traffic classification using the
service-class dynamic dot1p
command (honor dot1p) on all DCB-enabled interfaces. If you use L2
class maps to map dot1p priority traffic to egress queues, take into account the default dot1p-queue
assignments in the following table and the maximum number of two lossless queues supported on a port
(refer to
Configuring Lossless Queues ).
Although Dell Networking OS allows you to change the default dot1p priority-queue assignments (refer to
Setting dot1p Priorities for Incoming Traffic ), DCB policies applied to an interface may become invalid if
you reconfigure dot1p-queue mapping. If the configured DCB policy remains valid, the change in the
dot1p-queue assignment is allowed.
NOTE: Although, each port on the S4810, S4820T, and S5000 devices support 8 QoS queues, you can
configure only 4 QoS queues (0-3) to manage data traffic. The remaining 4 queues (4-7) are reserved for
control traffic.
Data Center Bridging (DCB) 338