Industrial Managed
Ethernet Switch – EH9711
User Manual
Page
103
of
223
Label
Description
Factory
Default
Mode
Select LLDP mode.
Rx only
The switch will not send out LLDP information, but LLDP information from
neighbour units is analysed.
Tx only
The switch will drop LLDP information received from neighbours, but will
send out LLDP information.
Disabled
The switch will not send out LLDP information, and will
drop LLDP information received from neighbours.
Enabled
The switch will send out LLDP information, and will
analyse LLDP information received from neighbours.
Disabled
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 neighbours’ 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 neighbours’ 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 neighbours 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 neighbours’ table.
If all interfaces have CDP awareness disabled the switch forwards CDP frames
received from neighbour 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 isn't
removed immediately, but gets removed when the hold time is exceeded.
Unclicked
Port Descr
Optional TLV: When checked the "port description" is included in LLDP information
transmitted.
Unclicked
Sys Name
Optional TLV: When checked the "system name" is included in LLDP information
transmitted.
Clicked
Sys Descr
Optional TLV: When checked the "system description" is included in LLDP
information transmitted.
Clicked
Sys Capa
Optional TLV: When checked the "system capability" is included in LLDP
information transmitted.
Clicked
Mgmt Addr
Optional TLV: When checked the "management address" is included in LLDP
information transmitted.
Clicked
Click
Save
button to save changes. Click
Reset
button to undo any changes made locally and revert to previously saved
values.
2.10
SyncE
Synchronous Ethernet (SyncE) uses a physical layer interface to pass timing from one node to the other in the same manner as
timing is passed in SONET or SDH. SyncE, as defined by ITU-T standards, such as G.8261, G.8262, G.8264, and G.781,
leverages the physical layer of Ethernet to transmit frequency to remote sites. This synchronous transmission of frequency over
Ethernet provides a cost-effective alternative for network designers. This functionality is used to make a network ‘clock
frequency synchronized’. For SyncE to work, each network element along the synchronization path must support SyncE.
