Performance Monitoring - Alcatel-Lucent 1643 AMS User's Operation Manual

Traffic provisioning

Performance monitoring

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Performance counters
On the VC-12, VC-3, or VC-4 termination points connected to a WAN port, standard
SDH performance monitoring can be activated. The same counters that apply for
VC-12, VC-3, or VC-4 termination points on any other port also apply to the VC-12,
VC-3, or VC-4 termination points on a WAN port.
Apart from this standard SDH performance monitoring, a limited amount of counters
that are dedicated to LAN/WAN ports are defined. Activation of these counters can be
established by setting:
• the LAN/WAN port mode to monitored
• selecting a LAN port or WAN port as active PM point
• setting the PM point type to LAN or WAN.
The supported counters are:
• CbS (total number of bytes sent)
• CbR (total number of bytes received)
• pDe (total number of errored packets dropped)
Note that CbS and CbR are rather traffic monitoring counters than performance
monitoring counters, as they give insight in the traffic load in all places in the network.
pDe is a real performance monitoring counter as it gives an indication about the
performance of the network. Only unidirectional PM is supported for these parameters.
See the following figure for the location of the measurements. Note that because of the
difference in units, bytes versus packets, the counters cannot be correlated with each
other. Also the counter for dropped packets considers only packets dropped due to
errors, and does not include packets dropped due to congestion.
Ethernet
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Alcatel-Lucent - Proprietary
See notice on first page
CBS
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365-312-807R7.2
Issue 4, May 2007