Reference Guide

302 | Data Center Bridging (DCB)
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DCBx Error Messages
An error in DCBx operation is displayed using the following syslog messages:
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 enabled DCBx debug traces for all or a specific control path, use the following command:
Verifying DCB Configuration
Use the show commands in Table 13-25 to display DCB configurations.
Task Command Command Mode
Enable DCBx debugging, where:
• 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.
debug DCBx {all | auto-detect-timer
| config-exchng | fail | mgmt |
resource | sem | tlv}
EXEC PRIVILEGE
Table 13-25. Displaying DCB Configurations
Command Output
show dot1p-queue mapping Displays the current 802.1p priority-queue mapping.
show dcb [stack-unit unit-number] Displays 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. Range is : 0 to 5.