Cisco PIX Firewall: Failed reassembly requests Health Monitor

Jalasoft.Xian.SmartManagementPacks.CiscoPix.FailedReassemblyRequests.1.1 (AggregateMonitor)

This monitor catches Xian events that notifies when the Failed reassembly requests if has changed its state.

Knowledge Base article:

Summary

Failed reassembly requests are over threshold.

The number of failing reassembly requests is above the maximum threshold configured in Xian Network Manager 2012.

Causes

If the count is at a suspect level, there might be a capacity problem; however, this is not necessarily a count of discarded IP fragments.

Resolutions

Verify that the threshold is set at a reasonable value. It is also possible to design an internal network to avoid fragmentation and the subsequent reassembly requirement.

Additional

Monitors the number of reassembly requests that have failed.

Element properties:

TargetJalasoft.Xian.Common.Types.ThirdParty.Cisco.JsXCiscoPixFirewallSnmpInterfaceElementContainer
Parent MonitorSystem.Health.PerformanceState
AlgorithmWorstOf
CategoryStateCollection
EnabledTrue
Alert GenerateTrue
Alert SeverityMatchMonitorHealth
Alert PriorityLow
Alert Auto ResolveTrue
RemotableTrue
AccessibilityPublic
Alert Message
Failed reassembly requests Alert
{0}

Source Code:

<AggregateMonitor ID="Jalasoft.Xian.SmartManagementPacks.CiscoPix.FailedReassemblyRequests.1.1" Accessibility="Public" Enabled="true" Target="ThirdParty_Cisco!Jalasoft.Xian.Common.Types.ThirdParty.Cisco.JsXCiscoPixFirewallSnmpInterfaceElementContainer" ParentMonitorID="SystemHealth!System.Health.PerformanceState" Remotable="true" Priority="Normal">
<Category>StateCollection</Category>
<AlertSettings AlertMessage="FailedReassemblyRequests_AlertMessage">
<AlertOnState>Warning</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>Low</AlertPriority>
<AlertSeverity>MatchMonitorHealth</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Data/Context/Params/Param[3]$</AlertParameter1>
</AlertParameters>
</AlertSettings>
<Algorithm>WorstOf</Algorithm>
</AggregateMonitor>