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Field Description
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 Trac Classication and Queue
Assignment
The following section describes QoS dot1P trac classication and assignments.
DCB supports PFC, ETS, and DCBx to handle converged Ethernet trac that is assigned to an egress queue according to the following
QoS methods:
Honor dot1p You can honor dot1p priorities in ingress trac at the port or global switch level (refer to Default dot1p to Queue
Mapping) using the service-class dynamic dot1p command in INTERFACE conguration mode.
Layer 2 class maps You can use dot1p priorities to classify trac in a class map and apply a service policy to an ingress port to map
trac to egress queues.
NOTE: Dell EMC Networking does not recommend mapping all ingress trac to a single queue when using PFC and ETS.
However, Dell EMC Networking does recommend using Ingress trac classication using the service-class dynamic
dot1p command (honor dot1p) on all DCB-enabled interfaces. If you use L2 class maps to map dot1p priority trac 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 Conguring Lossless Queues).
Although Dell EMC Networking OS allows you to change the default dot1p priority-queue assignments (refer to Setting dot1p Priorities
for Incoming Trac), DCB policies applied to an interface may become invalid if you recongure dot1p-queue mapping. If the
congured 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 congure only 4 QoS
queues (0-3) to manage data trac. The remaining 4 queues (4-7) are reserved for control trac.
dot1p Value in
the Incoming
Frame
Egress Queue Assignment
0 0
1 0
2 0
3 1
4 2
5 3
6 3
7 3
286 Data Center Bridging (DCB)