Using the OpenLane NMS
5-23
9124-A2-GH30-00
June 1999 - Preliminary
In most cases, transmission characteristics of the customer’s data rather than the
network is the cause of apparent network problems. This summary allows you to
determine the following:
H
Overutilization of the network, trying to deliver amounts of data well over CIR.
H
Data frames that are too large or small.
H
More packets are being sent than the receiving node can receive due to
differences in physical circuit capacity.
Any of these will cause the network switch’s egress queue to fill, increasing
latency and data loss.
Correlate the time at which a problem occurred to the following graphs.
H
Transmit Bit Burst Analysis As % CIR – Shows network utilization bursting
details to aid in determining the cause of frame relay lost packets and/or
excessive network latency. Tx Bit Burst Analysis is measured in megabits and
shows the exact distribution of transmitted data in relation to the DLCI’s CIR
and excess burst size.
The color displayed indicates whether the DLCI is or is coming close to
exceeding its purchased CIR and excess burst size.
Color
% of CIR
Indication
Blue
Less than or
equal to 99 %
Packets are within CIR.
Gold
100 –199 %
Packets are at or over CIR.
Pink
200 – 299 %
Packets are two times greater than the
contracted CIR.
Aqua
300 – 399 %
Packets are three times greater than the
contracted CIR.
Yellow
More than 399 %
Packets are four times greater than the
contracted CIR.
When zero CIR has been configured, the percentage breakdowns are based
on link speed instead of CIR.
If utilization is consistently under 50 % of CIR, the CIR contracted for should
be downgraded. If over 100 %, the DLCI may be ready for its CIR to be
upgraded.
When a DLCI is overutilizing the network, compare the Tx Bit Burst Analysis
graph against the following graphs to determine the cause:
— End-to-End Data Delivery Success to see if frames are being dropped.
— Round Trip Network Latency to see if the bursting is impacting latency.
Содержание FrameSaver SLV 9124
Страница 1: ...FrameSaverr SLV 9124 TECHNICAL REFERENCE Document No 9124 A2 GH30 00 June 1999 PRELIMINARY DRAFT ...
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Страница 200: ...Configuration 8 78 9124 A2 GH30 00 June 1999 Preliminary This page intentionally left blank ...
Страница 286: ...Menu Hierarchy A 4 9124 A2 GH30 00 June 1999 Preliminary This page intentionally left blank ...
Страница 330: ...Cables Connectors and Pin Assignments D 10 9124 A2 GH30 00 June 1999 Preliminary This page intentionally left blank ...
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