Dell Networking 2024 Reference Manual page 887

1 If the configuration is compatible with the configuration source, then the
DCBX client becomes operationally active on the upstream port.
2 If the configuration is not compatible with the configuration source, then
a message is logged indicating an incompatible configuration, an error
counter is incremented, and the DCBX client is operationally disabled on
the port. The expectation is that the network administrator configures the
upstream devices appropriately so that all such devices advertise a
compatible configuration.
Auto-Downstream
Advertises a configuration but is not willing to accept one from the link
partner. However, the port will accept a configuration propagated internally
by the configuration source. The local configuration parameters for PFC and
ETS, if any, are overridden with the negotiated configuration.Specifically, the
willing parameter is disabled on auto-downstream ports. By default, auto-
downstream ports have the recommendation TLV parameter enabled. Auto-
downstream ports that receive internally propagated information ignore their
local configuration and utilize the internally propagated information.
Configuration Source
In this role, the port has been manually selected to be the configuration
source. Configuration received over this port is propagated to the other auto-
configuration ports, however, no automatic election of a new configuration
source port is allowed. Only one port can be configured as the configuration
source. The local configuration parameters for PFC and ETS, if any, are
overridden with the received configuration. Events that cause selection of a
new configuration source are ignored. The configuration received over the
configuration source port is maintained until cleared by the operator (set the
port to the manual role). FIP snooping must be enabled to set a port to
configuration source. For interfaces configured in a port-channel for which it
is desirable to receive configuration information, it is strongly recommended
that the auto-up setting be used on the physical interfaces in the port channel
in preference to the configuration source parameter.
Data Center Bridging Commands
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