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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Troubleshooting PFC, ETS, and DCBx Operation

In the show interfaces pfc | ets | dcbx output, the DCBx operational status may be down for any of the reasons described in the following table.

When DCBx is down, the following values display in the show output field for DCBx Oper status:

PFC DCBx Oper status: Down
ETS DCBx Oper status: Down
DCBx Oper status: Disabled.

Reason	Description
Port Shutdown	Port is shut down. All other reasons for DCBx inoperation, if any, are ignored.
LLDP Rx/Tx is disabled	LLDP is disabled (Admin Mode set to rx or tx only) globally or on the interface.
Waiting for Peer	Waiting for peer or detected peer connection has aged out.
Multiple Peer Detected	Multiple peer connections detected on the interface.
Version Conflict	DCBx version on peer version is different than the local or globally configured DCBx version.
Config-source Down	Although DCBx parameters match in auto-upstream or auto-downstream port, the configuration source (elected dynamically or CLI-configured) is down.
Unrecognized TLV received	Invalid TLV length TLV has been received. In the case of an invalid PFC or ETS TLV, the error displays in the `show interfaces pfc \| ets` output. The `show interfaces dcbx` output displays PFC or ETS as down.
Admin Mode OFF (Local)	Local Admin Mode is disabled.
Admin Mode OFF (Remote)	Remote Admin Mode is disabled.
Waiting for ACK from Peer	For a legacy DCBx version, a peer has not acknowledged the reception of a sent packet. This reason displays only when a remote peer is willing to receive a DCB configuration.
Error Bit set	For a legacy DCBx version, a peer has sent packets with an error bit set. This reason displays only when a remote peer is willing to receive a DCB configuration.
Enabled with ETS Mismatch ( `show interfaces dcbx` output)	DCBx is enabled but an ETS validation failure error has occurred.
PFC is down ( `show interfaces pfc` output)	One of the following PFC-specific errors has occurred: No MBC support. Configured PFC priorities exceed maximum PFC capability limit. New dot1p-to-queue mapping violates the allowed system limit for PFC Enable status per priority
ETS is down ( `show interfaces ets` output)	One of the following ETS-specific errors occurred in ETS validation: Unsupported PGID A priority group exceeds the maximum number of supported priorities. COSQ is mapped to more than one priority group. COSQ is mapped to more than one priority group. - Invalid or unsupported transmission selection algorithm (TSA). Bandwidth is configured for an unconfigured priority group. Total ETS bandwidth mapped in priority groups is not equal to 100%. Priorities mapped to a queue use different TSAs. Total bandwidth assigned to priorities in one or more priority groups is not equal to 100%. Or one of the following ETS failure errors occurred: Incompatible priority group ID (PGID). Incompatible bandwidth (BW) allocation. Incompatible TSA. Incompatible TC BW. Incompatible TC TSA.