Reference Guide

Debugging DCBx on an Interface
To enable DCBx debug traces for all or a specific control paths, use the following command.
• Enable DCBx debugging.
EXEC PRIVILEGE mode
debug DCBx {all | auto-detect-timer | config-exchng | fail | mgmt | resource
| sem | tlv}
– all: enables all DCBx debugging operations.
– auto-detect-timer: enables traces for DCBx auto-detect timers.
– config-exchng: enables traces for DCBx configuration exchanges.
– fail: enables traces for DCBx failures.
– mgmt: enables traces for DCBx management frames.
– resource: enables traces for DCBx system resource frames.
– sem: enables traces for the DCBx state machine.
– tlv: enables traces for DCBx TLVs.
Verifying the DCB Configuration
To display DCB configurations, use the following show commands.
Table 15. Displaying DCB Configurations
Command Output
show dot1p-queue mapping
Displays the current 802.1p priority-queue
mapping.
show dcb [stack-unit unit-number]
Displays the data center bridging status, number of
PFC-enabled ports, and number of PFC-enabled
queues. On the master switch in a stack, you can
specify a stack-unit number. The range is from 0 to
5.
show qos priority-groups
Displays the ETS priority groups configured on the
switch, including the 802.1p priority classes and ID
of each group.
show interface port-type slot/port pfc
{summary | detail}
Displays the PFC configuration applied to ingress
traffic on an interface, including priorities and link
delay.
To clear PFC TLV counters, use the clear pfc
counters interface port-type slot/port
command.
show interface
port-type slot/port pfc
statistics
Displays counters for the PFC frames received and
transmitted (by dot1p priority class) on an interface.
show interface port-type slot/port ets
{summary | detail}
Displays the ETS configuration applied to egress
traffic on an interface, including priority groups
with priorities and bandwidth allocation.
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Data Center Bridging (DCB)