PLANET SGSW-24040 - Manual (Page 290)

User’s Manual of SGSW-24040 / 24240 Series
290
is enabled.
Only CDP TLVs that can be mapped into a corresponding field in the LLDP
neighbors table are decoded. All other TLVs are discarded ( Unrecognized CDP
TLVs and discarded CDP frame are not shown in the LLDP statistic. Only ). CDP
TLVs are mapped into LLDP neighbors table as shown below.
CDP TLV "Device ID" is mapped into the LLDP "Chassis ID" field.
CDP TLV "Address" is mapped into 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 into the LLDP "Port ID" field.
CDP TLV "Version and Platform" is mapped into the LLDP "System Description"
field.
Both the CDP and LLDP supports "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 for a port is disabled the CDP information isn't
removed immediately, but will be 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.
The system capabilities identifies the primary function(s) of the system and
whether or not these primary functions are enabled. The information advertised
by this TLV is described in IEEE 802.1AB.
• Mgmt Addr
Optional TLV: When checked the "management address" is included in LLDP
information transmitted.
The management address protocol packet includes the IPv4 address of the
switch. If no management address is available, the address should be the MAC
address for the CPU or for the port sending this advertisement. The management
address TLV may also include information about the specific interface associated
with this address, and an object identifier indicating the type of hardware
component or protocol entity associated with this address