Administrator Guide

DCBx Error Messages
The following syslog messages appear when an error in DCBx operation occurs.
LLDP_MULTIPLE_PEER_DETECTED: DCBx is operationally disabled after detecting more than one DCBx
peer on the port interface.
LLDP_PEER_AGE_OUT: DCBx is disabled as a result of LLDP timing out on a DCBx peer interface.
DSM_DCBx_PEER_VERSION_CONFLICT: A local port expected to receive the IEEE, CIN, or CEE version
in a DCBx TLV from a remote peer but received a different, conflicting DCBx version.
DSM_DCBx_PFC_PARAMETERS_MATCH and DSM_DCBx_PFC_PARAMETERS_MISMATCH: A local DCBx port received
a compatible (match) or incompatible (mismatch) PFC configuration from a peer.
DSM_DCBx_ETS_PARAMETERS_MATCH and DSM_DCBx_ETS_PARAMETERS_MISMATCH: A local DCBx port received
a compatible (match) or incompatible (mismatch) ETS configuration from a peer.
LLDP_UNRECOGNISED_DCBx_TLV_RECEIVED: A local DCBx port received an unrecognized DCBx TLV from
a peer.
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 20. Displaying DCB Configurations
Command Output
show dot1p-queue mapping
Displays the current 802.1p priority-queue mapping.
show dcb linecard unit-number
Displays the data center bridging status, number of PFC-enabled
ports, and number of PFC-enabled queues. You can optionally
specify the linecard. The range for line card is from 0 to 11.
show qos dcb-map name
Displays the DCB map configured on the switch.
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.
256 Data Center Bridging (DCB)