Functional principle of RTD measurements
A test frame is sent out from the FROM node. The test frame has the MAC address of
the TO node as its destination MAC address (DA) all these influencing characteristics.
Configuration rules
Ethernet service route RTD measurements are only supported for virtual switches
operating in one of the following modes:
• IEEE 802.1Q VLAN tagging mode with oversubscription (that is, with encoding of
the dropping precedence)
• Provider bridge mode
The total number of Ethernet service routes per LAN unit is limited to 1024. If the
operational mode of the virtual switch is changed to repeater mode, then the Ethernet
service route will be deleted. If an Ethernet service route is deleted, then also the
attached PM points (current and historic bins) will be deleted.
PM counters
The following counters are supported for Ethernet service route round trip delay
measurements:
Ethernet
service
route
round
trip
delay
Counter Location Unit Threshold X5IP X4IP X8PL
LAN WAN LAN WANLANWAN
Mini-
mum
round
trip
delay
mRTD /ETH_
Service_
Route
microsecondx xxxx--
Average
round
trip
delay
aRTD /ETH_
Service_
Route
microsecond- xxxx--
90.0
percen-
tile of
round
trip
delay
xRTD /ETH_
Service_
Route
microsecond- xxxx--
Performance monitoring
Ethernet performance monitoring
....................................................................................................................................................................................................................................
10-24
Alcatel-Lucent - Proprietary
See notice on first page
365-312-807R7.2
Issue 4, May 2007
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