Dell PowerConnect 8100 CLI Reference Guide - Page 875

overridden with the negotiated configuration. Specifically, the willing parameter is enabled on the port and the recommendation TLV is sent to the peer and processed if received locally. The first auto-upstream port to successfully accept a compatible configuration becomes the configuration source. The configuration source propagates its configuration to other autoupstream and auto-downstream ports. Only the configuration source may propagate configuration to other ports internally. Auto-upstream ports that receive internally propagated information ignore their local configuration and utilize the internally propagated information. Peer configurations received on auto-upstream ports other than the configuration source result in one of two possibilities. 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, autodownstream ports have the recommendation TLV parameter enabled. Autodownstream 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 autoconfiguration 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 Data Center Bridging Commands 875