Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.1P1 - Page 523
TIA-1057 (LLDP-MED) Overview, TIA Organizationally Specific TLVs, TIA Organizationally
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Type 127 TLV Power via MDI 127 Link Aggregation 127 Maximum Frame Size TIA-1057 (LLDP-MED) Overview Description LLDP, but is available and mandatory (nonconfigurable) in the LLDP-MED implementation. Dell Networking supports the LLDP-MED protocol, which recommends that Power via MDI TLV be not implemented, and therefore Dell Networking implements Extended Power via MDI TLV only. Indicates whether the link is capable of being aggregated, whether it is currently in a LAG, and the port identification of the LAG. Dell Networking OS does not currently support this TLV. Indicates the maximum frame size capability of the MAC and PHY. Link layer discovery protocol - media endpoint discovery (LLDP-MED) as defined by ANSI/ TIA-1057- provides additional organizationally specific TLVs so that endpoint devices and network connectivity devices can advertise their characteristics and configuration information; the OUI for the Telecommunications Industry Association (TIA) is 00-12-BB. • LLDP-MED Endpoint Device - any device that is on an IEEE 802 LAN network edge can communicate using IP and uses the LLDPMED framework. • LLDP-MED Network Connectivity Device - any device that provides access to an IEEE 802 LAN to an LLDP-MED endpoint device and supports IEEE 802.1AB (LLDP) and TIA-1057 (LLDP-MED). The Dell Networking system is an LLDP-MED network connectivity device. Regarding connected endpoint devices, LLDP-MED provides network connectivity devices with the ability to: • manage inventory • manage Power over Ethernet (PoE) • identify physical location • identify network policy LLDP-MED is designed for, but not limited to, VoIP endpoints. TIA Organizationally Specific TLVs The Dell Networking system is an LLDP-MED Network Connectivity Device (Device Type 4). Network connectivity devices are responsible for: • transmitting an LLDP-MED capability TLV to endpoint devices • storing the information that endpoint devices advertise The following table describes the five types of TIA-1057 Organizationally Specific TLVs. Table 52. TIA-1057 (LLDP-MED) Organizationally Specific TLVs Type SubType 127 1 TLV LLDP-MED Capabilities Description Indicates: Link Layer Discovery Protocol (LLDP) 523
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