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The WAN report displays the WAN Link performance for selected nodes. As of version 3.0.4, selection byinterfaceis by interface is not supported and bydefaultall interfaces being collected of selected nodes whose network type is "wan" are processed, this can be expanded to other network types be changing configuration option wanoption wan_nettypes in opCommon.nmis to include the required network types, changing this to "." (period) will apply to all network types.
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Notice the Full Details report gives quite a few more details:
| 95th% In Util | 95th% Out Util | In Util Exc. | Out Util Exc. | Max In Errors% | Max Out Errors% | In Error Exc. | Out Error Exc. | Max In Discards% | Max Out Discards% | In Discard Exc. | Out Discard Exc. |
Formula used for Calculation
Maximum and Average input and output utilisation is calculated for the interface. The larger of maximum and average input and output utilisation is used in formula.
Link Availability = Condition: "Router has LOW interface availability"
Action: Investigate carrier for interface problems
Interface availability less than 99.9%
Link Availability = Condition: "Router has VERY LOW interface availability"
Action: Investigate carrier for interface problems
Interface availability less than 95%
Over-utilised Links = Condition: "WAN link has VERY HIGH utilisation"
Action: Investigate WAN Upgrade Urgently
Average link utilisation is above 80% average utilisation
Over-utilised Links = Condition: "WAN link has HIGH utilisation"
Action: Investigate WAN Upgrade
Average link utilisation is above 65% average utilisation
Links Considered Normal = Condition: "WAN link has acceptable utilisation"
Action: WAN utilisation is OK
Average link utilisation is less than 65%
Input and/or Output Errors = Condition: "WAN link has input/output errors"
Action: Investigate cause of interface errors, likely transmission
Error rates higher than 1% of input or output packets
Input and/or Output Discards = Condition: "WAN link has input/output discards"
Action: Investigate cause of interface discards, likely related to QoS or buffer overruns.
Discard rates higher than 1% of input or output packets