Lantronix SM12XPA, Руководство пользователя

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Lantronix SM12XPA Web User Guide
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802.1AS Statistics
This page lets you view current 802.1AS Clock Instance-specific statistics. The IEEE 802.1AS standard enables
stations attached to bridged LANs to meet the respective jitter, wander, and time synchronization requirements
for time-sensitive applications. IEEE 802.1AS-2011 is part of the IEEE Audio Video Bridging (AVB) group of
standards, further extended by the IEEE 802.1 Time-Sensitive Networking (TSN) Task Group.
In particular, 802.1AS defines how IEEE 802.3 (Ethernet), IEEE 802.11 (Wi-Fi), and MoCA (Multimedia over Coax
Alliance) can all be parts of the same PTP timing domain.
Web Interface
To display 802.1AS Clock Instance-specific statistics in the web UI:
1. Click PTP and Status.
2. Select the Clock Instance (0-3) at the dropdown.
3. Click Apply to display the clock instance statistics.
Figure 16-3: 802.1AS Clock Instance Specific Statistics
Parameter descriptions :
Instance : At the dropdown select a PTP Instance (Clock Instance 0-3 or CMLDS (Common Mean Link Delay
Service)).
802.1AS Received counters
SyncCount
: A counter that increments every time when synchronization information is received.
FollowUpCount
: A counter that increments every time when a Follow Up message is received.
PdelayRequestCount : A counter that increments every time when a Pdelay_Req message is received.
PdelayResponseCount : A counter that increments every time when a Pdelay_Resp message is received.
PdelayResponseFollowUpCount : A counter that increments every time when a Pdelay_Resp_Follow_Up
message is received.
AnnounceCount : A counter that increments every time when an Announce message is received.
PTPPacketDiscardCount : A counter that increments every time when a PTP message is discarded.
syncReceiptTimeoutCount
: A counter that increments every time when sync receipt timeout occurs.
announceReceiptTimeoutCount : A counter that increments every time when announce receipt timeout occurs.
pdelayAllowedLostResponsesExceededCount : A counter that increments every time the value of the variable
lostResponses exceeds the value of the variable allowedLostResponses.