Black Box LPB2910A, User Manual

Page: 310 / 367

Publication date: Sept, 2015
Revision A1
298
Shows the number of LLDP frames dropped due to the entry table being full.

Total Neighbors Entries Aged Out:
Shows the number of entries deleted due to Time-­‐To-­‐Live expiring.
Local Counters
The displayed table contains a row for each port. The columns hold the following information:

Local Port:
The port on which LLDP frames are received or transmitted.

Tx Frames:
The number of LLDP frames transmitted on the port.
 Rx Frames:
The number of LLDP frames received on the port.

Rx Errors:
The number of received LLDP frames containing some kind of error.

Frames Discarded:
If an LLDP frame is received on a port, and the switch's internal table is full, the LLDP frame is
counted and discarded. This situation is known as "Too Many Neighbors" in the LLDP standard.
LLDP frames require a new entry in the table when the Chassis ID or Remote Port ID is not already
contained within the table. Entries are removed from the table when a given port's link is down, an
LLDP shutdown frame is received, or when the entry ages out.
 TLVs Discarded:
Each LLDP frame can contain multiple pieces of information, known as TLVs (TLV is short for "Type
Length Value"). If a TLV is malformed, it is counted and discarded.

TLVs Unrecognized:
The number of well-­‐formed TLVs, but with an unknown type value.
 Org. Discarded:
The number of received TLVs that were discarded.

Age-­‐Outs:
Each LLDP frame contains information about how long time the LLDP information is valid (age-­‐out
time). If no new LLDP frame is received within the age out time, the LLDP information is removed,
and the Age-­‐Out counter is incremented.
 Buttons
Auto-­‐refresh: Check this box to refresh the page automatically. Automatic refresh occurs every 3
seconds.
Clear: Clears the counters for the selected port.
Refresh: Click to refresh the page.