
LLDP
LLDP – Configure LLDP
Microsemi PDS-408G Web Management User Guide Ver. 1.0.1, 03-2019
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o
Tx only:
The switch will drop LLDP information received from neighbors, but will send out
LLDP information.
o
Disabled:
The switch will not send out LLDP information, and will drop LLDP information
received from neighbors.
o
Enabled:
The switch will send out LLDP information, and will analyze LLDP information
received from neighbors.
•
CDP Aware
- Select CDP awareness.
The CDP operation is restricted to decoding incoming CDP frames (The switch doesn’t transmit
CDP frames). CDP frames are only decoded if LLDP on the interface is enabled. Only CDP
TLVs that can be mapped to a corresponding field in the LLDP neighbors table are decoded.
All other TLVs are discarded (unrecognized CDP TLVs and discarded CDP frames are not
shown in the LLDP statistics.). CDP TLVs are mapped onto LLDP neighbors table as shown
below.
o
CDP TLV "Device ID" is mapped to the LLDP "Chassis ID" field.
o
CDP TLV "Address" is mapped to the LLDP "Management Address" field. The CDP address
TLV can contain multiple addresses, but only the first address is shown in the LLDP neighbors
table.
o
CDP TLV "Port ID" is mapped to the LLDP "Port ID" field.
o
CDP TLV "Version and Platform" is mapped to the LLDP "System Description" field.
Both the CDP and LLDP support "system capabilities", but the CDP capabilities cover capabilities
that are not part of the LLDP. These capabilities are shown as "others" in the LLDP neighbors
table.
If all interfaces have CDP awareness disabled, the switch forwards CDP frames received from
neighbor devices. If at least one interface has CDP awareness enabled all CDP frames are
terminated by the switch.
NOTE:
When CDP awareness on an interface is disabled, the CDP information is not removed
immediately, but gets removed when the hold time is exceeded
•
Port Descr
- Optional TLV: When checked the "port description" is included in LLDP
information transmitted.
•
Sys Name
- Optional TLV: When checked the "system name" is included in LLDP information
transmitted.
•
Sys Descr
- Optional TLV: When checked the "system description" is included in LLDP
information transmitted.
•
Sys Capa
- Optional TLV: When checked the "system capability" is included in LLDP
information transmitted.
•
Mgmt Addr
- Optional TLV: When checked the "management address" is included in LLDP
information transmitted.