Service Manual

LLDP-MED Capabilities TLV
The LLDP-MED capabilities TLV communicates the types of TLVs that the endpoint device and the network connectivity device
support. LLDP-MED network connectivity devices must transmit the Network Policies TLV.
● The value of the LLDP-MED capabilities field in the TLV is a 2–octet bitmap, each bit represents an LLDP-MED capability (as
shown in the following table).
● The possible values of the LLDP-MED device type are shown in the following. The Dell EMC Networking system is a network
connectivity device, which is Type 4.
When you enable LLDP-MED in Dell EMC Networking OS (using the advertise med command), the system begins
transmitting this TLV.
Figure 82. LLDP-MED Capabilities TLV
Table 55. Dell EMC Networking OS LLDP-MED Capabilities
Bit Position TLV Dell EMC Networking OS Support
0 LLDP-MED Capabilities Yes
1 Network Policy Yes
2 Location Identification Yes
3 Extended Power via MDI-PSE Yes
4 Extended Power via MDI-PD No
5 Inventory No
6–15 reserved No
Table 56. LLDP-MED Device Types
Value Device Type
0 Type Not Defined
1 Endpoint Class 1
2 Endpoint Class 2
3 Endpoint Class 3
4 Network Connectivity
5–255 Reserved
LLDP-MED Network Policies TLV
A network policy in the context of LLDP-MED is a device’s VLAN configuration and associated Layer 2 and Layer 3
configurations.
LLDP-MED network policies TLV include:
● VLAN ID
● VLAN tagged or untagged status
● Layer 2 priority
● DSCP value
Link Layer Discovery Protocol (LLDP)
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