Alcatel-Lucent 1643 AMS Applications And Planning Manual page 245

Ethernet Overview
PM counters for Ethernet service flow (per flow)
The 1643 AM / 1643 AMS supports Ethernet service flow PM counters which provide
performance monitoring for service flows. The flows are defined for QoS and CQS
functions. These functions can be identified by the C/S-VID, C/S-UP, DMAC address
or the IP-TOS byte. Users can select any individual flow that is terminated in the 1643
AM / 1643 AMS for performance monitoring (including binning and thresholding).
The following PM counters display the Ethernet service flow on the X4IP and X5IP
option cards unless indicated otherwise.
• aQIB: All incoming bytes for one service flow
• gQIB: Incoming bytes of all green marked frames for one service flow (X5IP only)
Note that this feature is only applicable to the X4IP and X5IP option cards.
End-to-end Ethernet PM - Round Trip Delay (RTD) measurement
The 1643 AM / 1643 AMS supports end-to-end CPU in-band Round Trip Delay
measurement using a retrieval function for the MAC-DA of the VS. Users can enable a
repeated latency measurement to another network element in the TransLAN network
using the MAC-DA, TC, the color (dropping precedence), and the V-LAN tag to
identify the VS. The measured path follows the currently valid STP-topology. The RTD
measurement accuracy is 4 ms.
Note that this feature is only available on the X4IP and X5IP option cards.
RTD PM Counters
The 1643 AM / 1643 AMS supports Ethernet PM counters to display Ethernet RTD
measurements.
The following counters are only supported on the X4IP and X5IP option cards.
• mRTD: Minimum round trip delay
• aRTD: Average round trip delay
• xRTD: Maximum round trip delay
• p900RTD: 90.0 percentile of round trip delay
• p990RTD: 99.0 percentile of round trip delay
• p999RTD: 99.9 percentile of round trip delay
• sRTDM: Number of successful round trip delay measurements
• uRTDM: Number of unsuccessful (timed out) round trip delay measurements.
The Ethernet PM counters should be counted in bits or frames. The accuracy of these
counters is 1 ppm (10xE-6). This is applicable to all Ethernet counters on X4IP and
X5IP option cards.
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365-312-801R7.2
Issue 3, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
Performance monitoring
11-69