7–RoCE Configuration
Configuring DCQCN
165 AH0054602-00 J
# observe PFCs being generated on multiple priorities
debugfs.sh -n ens6f0 -d phy_mac_stat -P 0 | grep "Class Based Flow Control"
Limitations
DCQCN has the following limitations:
DCQCN mode currently supports only up to 64 QPs.
Cavium adapters can determine vLAN priority for PFC purposes from vLAN
priority or from DSCP bits in the ToS field. However, in the presence of both,
vLAN takes precedence.
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