INS_CNGE11FX3TX8MS[POE][HO] Rev. 11.6.17 PAGE 109
INSTRUCTION MANUAL
CNGE11FX3TX8MS[POE][HO]
TECH SUPPORT: 1.888.678.9427
Object
Description
Mode
Select LLDP mode.
Rx only The switch will not send out LLDP information, but LLDP information from neighbor units is
analyzed.
Tx only The switch will drop LLDP information received from neighbors, but will send out LLDP
information.
Disabled The switch will not send out LLDP information, and will drop LLDP information received
from neighbors.
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 port 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.
CDP TLV “Device ID” is mapped to the LLDP “Chassis ID” field.
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.
CDP TLV “Port ID” is mapped to the LLDP “Port ID” field.
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 ports have CDP awareness disabled the switch forwards CDP frames received from neighbor
devices. If at least one port has CDP awareness enabled all CDP frames are terminated by the
switch.
Note: When CDP awareness on a port is disabled the CDP information isn’t 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.
Apply
Click to apply changes.
Reset
Click to revert to previous values.
