Advanced TransLAN® Features
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Ethernet Performance Monitoring (ESW4_E14)
Ethernet Performance Monitoring in SDH network elements is based on SDH
performance monitoring concepts. The following sections describe the advanced
TransLAN® features that are implemented for Ethernet applications.
Round Trip Delay Measurement (RTD)
The following features enable Round Trip Delay measurement:
•
One Shot Ethernet In-Service RTD Measurement - FROM Node
•
Continuous Ethernet In-Service RTD Measurement - FROM Node
•
RTD Measurement Accuracy
•
Proprietary Ethernet In-Service RTD Measurement
One Shot Ethernet In-Service RTD Measurement - FROM Node
The virtual switches in the network element support proprietary in-service round trip
delay measurement by transmitting a special “ping” PDU from the local virtual switch
that is identified as the FROM Node to a remote switch that is identified as the TO
node. The TO node is identified by a MAC address. A ping frame with a defined
length can be sent with a certain VLAN, priority, and dropping precedence provisioned
by the user. Based on the responses from the remote node, the round trip time is
calculated. The result is presented to the user as a delay in milliseconds or a time-out.
Continuous Ethernet In-Service RTD Measurement - FROM Node
Users can provision a continuously repeating round trip delay measurement with the
following parameters.
•
FROM node virtual switch
•
TO node MAC address
•
Frame length
•
V-LAN
•
Traffic class
•
Dropping precedence
The repitition rate is approximately 45 seconds. The results are presented in the
Performance Monitoring format. For more information, refer the Metropolis
®
AMU
User Operations Guide.
Proprietary Ethernet In-Service RTD Measurement - TO Node
Protocol data units (PDUs) that are transmitted by a remote Ethernet switch for
in-service round trip measurement purposes (which are addressed to a local Ethernet
switch in the system) provide the appropriate response.
Product description
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365-312-847R4.0
Issue 4, November 2006
Lucent Technologies - Proprietary
See notice on first page
2-57
