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7 port statistics – PLANET WGSD-10020 User Manual

Page 297

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User’s Manual of WGSD-10020 Series

297

Object

Description

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 has run 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 links 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 organizationally TLVs received.

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

: Click to refresh the page immediately.

: Clears the local counters. All counters (including global counters) are cleared upon reboot.

Auto-refresh

:

Check this box to enable an automatic refresh of the page at regular intervals.

4.14.7 Port Statistics

By using EEE power savings can be achieved at the expense of traffic latency. This latency occurs due to that the circuits EEE

turn off to save power, need time to boot up before sending traffic over the link. This time is called "wakeup time". To achieve

minimal latency, devices can use LLDP to exchange information about their respective tx and rx "wakeup time ", as a way to

agree upon the minimum wakeup time they need.

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