D-Link DGS-3630 Emulator 1 - Page 863

DGS-3630 Layer 3 Stackable Managed Switch CLI Reference Guide Usage Guideline When no optional parameter is specified, all supported DCBX-specific TLVs are selected or de-selected. If the optional TLV advertisement state is enabled, they will be encapsulated in LLDPDU and sent to other devices. The Data Center Bridging Exchange protocol (DCBX) is used by DCB devices to exchange configuration information with directly connected peers. The protocol may also be used for misconfiguration detection and for the configuration of the peer. DCB exchanged attributes are packaged into organizationally specific TLVs. The OUI used for the DCBX TLV is the IEEE 802.1 OUI. DCBX is expected to operate over a point-to-point link. If multiple LLDP peer ports running DCBX are detected, DCBX should behave as if the DCBX TLVs of the peer port are not present until the multiple LLDP peer port condition is no longer present. However, a transition in the LLDP peer port may occur in some circumstances (like a transition from the system boot to the system operation). Therefore when it is detected that the number of peer ports running DCBX exceeds 1 for a period longer than the longest TTL of any of the peers, a multi-peer condition is detected. During the time when the multi-peer condition has not been detected the DCBX data from the most recent DCBX peer will be used. An LLDP peer port is identified by a concatenation of the chassis ID and port ID values transmitted in the LLDPDU. A DCBX peer port is a LLDP peer port that is sending DCBX TLVs. If PFC is disabled, the corresponding TLV won't be sent even if the corresponding TLV is selected. Example This example shows how to disable the Priority-based Flow Control TLV advertisement. Switch# configure terminal Switch(config)# no lldp dot1-tlv-select dcbx pfc-configuration Switch(config-if)# 67-5 lldp dot3-tlv-select This command is used to specify which optional type-length-value settings (TLVs) in the IEEE 802.3 organizationally specific TLV set will be encapsulated in LLDPDUs and sent to neighbor devices. Use the no form of this command to disable the transmission of the TLVs. lldp dot3-tlv-select [mac-phy-cfg | link-aggregation | max-frame-size | energy-efficient-eth] no lldp dot3-tlv-select [mac-phy-cfg | link-aggregation | max-frame-size | energy-efficient-eth] Parameters mac-phy-cfg link-aggregation max-frame-size energy-efficient-eth (Optional) Specifies the MAC/PHY configuration/status TLV to send. The MAC/PHY configuration/status TLV is an optional TLV that identifies (1) the duplex and bit-rate capability of the sending IEEE 802.3 LAN node, and (2) the current duplex and bit-rate settings of the sending IEEE 802.3 LAN node. (Optional) Specifies the link aggregation TLV to send. The link aggregation TLV contains the following information. Whether the link is capable of being aggregated, whether the link is currently in an aggregation, and the aggregated port channel ID of the port. If the port is not aggregated, the ID is 0. (Optional) Specifies the maximum frame size TLV to send. The maximum frame size TLV indicates the maximum frame size capability of the implemented MAC and PHY. (Optional) Specifies the Energy Efficient Ethernet TLV to send. The Energy Efficient Ethernet TLV indicates the reduced energy consumption capability of a link when no packets are being sent. Default No IEEE 802.3 organizationally specific TLV is selected. 858