724-746-5500 | blackbox.com
724-746-5500 | blackbox.com
Page 109
LGB5028A User‘s Manual
Chapter 6: Configuration
Total Neighbors Entries Aged Out: Shows the number of entries deleted because time-to-live expired.
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 an 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: Show the number of well-formed TLVs, but with an unknown type value.
Org. Discarded: The number of organizationally received TLVs.
Age-Outs: Each LLDP frame contains information about how long 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.
Auto-refresh: Check the box next to auto-refresh and the device will refresh the information automatically.
Upper right icon (Refresh, Clear): Click the “Refresh” icon to refresh the LLDP Port Statistics information manually. Or, press
“Clear” to clean up the entries.
6.9 Filtering Database
Filtering database configuration gathers many functions, including MAC table information and static MAC learning, which cannot
be categorized to a function type.
MAC Table
Switching frames is based upon the DMAC address contained in the frame. The switch builds up a table that maps MAC
addresses to switch ports that the frames should go to (based upon the DMAC address in the frame). This table contains both
static and dynamic entries. The static entries are configured by the network administrator if the administrator wants to do a fixed
mapping between the DMAC address and switch ports. The frames also contain a MAC address (SMAC address) that shows the
MAC address of the equipment sending the frame. The SMAC address is used by the switch to automatically update the MAC
table with these dynamic MAC addresses. Dynamic entries are removed from the MAC table if no frame with the
corresponding SMAC address appears after a configurable age time.
6.9.1 Configuration
The MAC address table is configured on this page. Set timeouts for entries in the dynamic MAC table and configure the static
MAC table here.
Web Interface
To configure the MAC address table in the Web interface:
Aging Configuration
1. Click “Configuration.”
2. Specify the “Disable Automatic Aging” and “Aging Time.”
3. Click “Save.”
