Reference Guide

Field Description
Local DCBx Status: Sequence Number Sequence number transmitted in Control TLVs.
Local DCBx Status: Acknowledgment Number Acknowledgement number transmitted in Control
TLVs.
Local DCBx Status: Protocol State Current operational state of DCBx protocol: ACK
or IN-SYNC.
Peer DCBx Status: DCBx Operational Version DCBx version advertised in Control TLVs received
from peer device.
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.
Generation of PFC for a Priority for Untagged Packets
In order to generate PFC for a particular priority for untagged packets, and configuring PFC for that
priority, you should find the queue number associated with priority from TABLE 1 and Associate an input
policy map to forward the matched DSCP packet to that queue. PFC frames gets generated with PFC
priority associated with the queue when the queue gets congested.
Operations on Untagged Packets
The below is example for enabling PFC for priority 2 for tagged packets. Priority (Packet Dot1p) 2 will be
mapped to PG6 on PRIO2PG setting. All other Priorities for which PFC is not enabled are mapped to
default PG – PG7.
Classification rules on ingress (Ingress FP CAM region) matches incoming packet-dot1p and assigns an
internal priority (to select queue as per Table 1 and Table 2).
The internal Priority assigned for the packet by Ingress FP is used by the memory management unit
(MMU) to assign the packet to right queue by indexing the internal-priority to queue map table (TABLE 1)
in hardware.
PRIO2COS setting for honoring the PFC protocol packets from the Peer switches is as per above Packet-
Dot1p->queue table (Table 2).
The packets that come in with packet-dot1p 2 alone will be assigned to PG6 on ingress.
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Data Center Bridging (DCB)