Lantronix SISPM1040-xxxx-L3 Web User Guide
33856 Rev. A https://www.lantronix.com/ 29
Tx Delay: If some configuration is changed (e.g. the IP address) a new LLDP frame is transmitted, but the time
between the LLDP frames will always be at least the value of Tx Delay seconds. Tx Delay cannot be larger than
1/4 of the Tx Interval value. Valid values are restricted to 1 - 8192 seconds.
Tx Reinit: When an interface is disabled, LLDP is disabled or the switch is rebooted, a LLDP shutdown frame is
transmitted to the neighboring units, signaling that the LLDP information isn't valid anymore. Tx Reinit controls the
number of seconds between the shutdown frame and a new LLDP initialization. Valid values are 1 - 10 seconds.
LLDP Port Configuration
Port: The switch port of the logical LLDP interface.
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 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.
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 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 isn't removed immediately, but gets
removed when the hold time is exceeded.
Trap: LLDP trapping notifies events such as newly-detected neighboring devices and link malfunctions.
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.
Buttons
Apply: Click to save changes.
Reset: : Click to undo any changes made locally and revert to previously saved values.
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