Cabletron Systems TRMMIM manual Non-Isolating Errors

Page 67

 

Ring Map

AC Errors

The count of frames containing errors in the ARI

 

(Address Recognized Indicator) or FCI (Frame Copied

 

Indicator) bits. Also known as ARI/FCI errors, AC errors

 

occur during the Ring Poll or Neighbor Notification

 

process when one station fails to correctly set the ARI

 

(address recognized) and FCI (frame copied) indicator

 

bits on the current AMP (active monitor present) or SMP

 

(standby monitor present) frame intended for it, thus

 

leaving its downstream neighbor without an accurate

 

upstream neighbor’s address. AC errors are detected

 

when a station receives more than one AMP frame with

 

ARI and FCI bits still set to 0 without seeing an

 

intervening SMP frame with its bits set to 1, or when the

 

station detects an SMP frame with its ARI and FCI bits

 

set to 0 without having seen an AMP frame with its ARI

 

and FCI bits set to 1. When a station detects an AC error,

 

it stops the Ring Poll process by not issuing its own SMP

 

frame; no other ring recovery procedures are initiated.

 

These errors are typically associated with hardware

 

(adapter) problems.

Abort Seq

The number of times that the associated station has

 

issued an abort sequence during transmission. These

 

occur when a station begins to queue data onto a token,

 

and subsequently detects that the token is corrupted

 

(because it does not have an ending delimiter after its

 

access control field). The station reports the error, but

 

does not release the corrupt token back onto the network.

 

This will cause the Active Monitor to purge the ring and

 

issue a new token. A failing network adapter is likely to

 

be the cause of this isolating error.

Internal Error

The count of errors caused by the station recognizing a

 

recoverable internal error in its adapter and removing

 

itself from the ring. Possible problems with the adapter

 

hardware include inoperable chip set, timer, or counters.

Non-Isolating Errors

 

Lost Frame Errors

The number of frames that the associated station has

 

transmitted that have not completely returned before its

 

Timer Return to Repeat (TRR) timer has expired (after 4.1

 

milliseconds). These non-isolating errors are generally

 

harmless, since they are often caused by a brief

 

disruption of ring clocking as a station enters or exits the

 

ring. However, they do require the Active Monitor to

 

purge the ring.

Congestion Errors

The number of times the associated station was unable to

 

copy frames addressed to it because of a lack of internal

 

buffering – that is, the station is receiving frames faster

 

than its adapter can copy information from the receive

Viewing Ring-level Information

3-17

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Contents Trmmim Page Virus Disclaimer Applicable to licenses to the United States Government only Restricted Rights NoticeContents Chapter Ring Map Chapter Alarm ConfigurationChapter Statistics Appendix a Trmmim MIB Structure Chapter Ring Security ConfigurationContents Trmmim Using the Trmmim User’s GuideIntroduction to Spma for the Trmmim What’s not in the Trmmim GuideScreen Displays ConventionsIntroduction to Spma for the Trmmim Button Using the MouseFTP Getting HelpTrmmim Firmware Introduction to Spma for the Trmmim Trmmim Firmware Using the Hub View Using the Trmmim Hub ViewNavigating Through the Hub View Using the Trmmim Hub ViewTrmmim Hub View Hub View Front PanelDevice Location UptimeTime and Date Device NameUsing the Trmmim Hub View Using the Mouse in a Hub View Module Module Index FNB Bypass State Port Display Form Hub View Port Color CodesPort Type ErrorsFrames Total BytesFNB Display Monitoring Hub Performance Using the Trmmim Hub View Name and Location Checking Device Status and Updating Front Panel InfoTotal Rings Checking Module StatusContact Date and TimeModule Speed FaultSpeed Fault Location Module NameModule/Port Admin StateChecking Port Status Port NameLink State Time Checking Station StatusInsertion Trap Vendor Station NameUpstream Neighbor/Downstream Neighbor Reverse MACs Physical LocationPriority Port MappingConfiguring Station Name, Location, or Priority Checking Ring Port StatusMedia Type Fault State TimeMedia Fault ClassChecking Statistics Abort BytesLine BurstManaging the Hub at the Device Level Managing the HubFind MAC Address 12. The Find MAC Address Window Setting the Polling IntervalsContact Status 13. Trmmim Polling IntervalsStatistics Device General StatusDevice Configuration Port Operational StateControlling Token Ring FNB Multiplexer Connections Managing the Hub at the Module LevelINS Bypass BoardLeft Connect Right ConnectClearing the Module FNB Configuration Window Selections Controlling Token Ring SpeedManagement MGT Controlling Token Ring MIM Management ModeEnabling All Ports on Token Ring Modules Auto AUTConverting a Station Port to a Ring-out Port Managing the Hub at the Port LevelEnabling and Disabling Station and Ring Ports Removing a Station from the Ring Ring Map From the Hub View From the command line stand-alone modeLaunching the Ring Map From the iconRing Name Selecting a Ring to MapRing Map Utilization SpeedStations NameQuick Info Popup Window Viewing Station-specific InformationDrop Board and PortPerformance and Errors Setting a Station NameViewing Management Station Configuration Setting a Station DropCommands Open Status Error StatusActive Monitor ErrorError Report Timer Setting the Statistics Calculation ModeViewing Ring-level Information Set Calculation Mode Window Viewing the Error TableError Table Window Isolating Errors Total ErrorsNon-Isolating Errors Changing the Station Labels Viewing Device Information Device Information Window Setting the Map Poll IntervalBeacon Events Viewing Beacon HistoryActive Monitor Changes Ring PurgesLongest Beacon Last Beacon TypeLast Beacon Beacon Configuration 12. The Beacon Configuration Window Using the Find Options 13. Sample Find Windows Searching by Station Name, MAC Address, Board/Port, or DropFinding the Active Monitor on the Network Finding the Management Station on the Network Frames or Errors measured/Δ Time in seconds 14. Sample Find Highest and Lowest Windows Accessing Other Spma ApplicationsAlarm Configuration Spmarun e5alarms IP address community name Setting and Viewing Ring Alarms Alarm Configuration Setting a Ring Level Alarm Setting and Viewing Station AlarmsAlarm Configuration Alarm Configuration Alarm Configuration Setting a Station Level Alarm Alarm Configuration Setting and Viewing Station Alarms Statistics Using StatisticsSpmarun e5stats IP Address community name Viewing the Ring Station ListDownstream Addr Module and PortStn Name Upstream AddrMonitoring Ring and Station Statistics Using the Reverse MAC ButtonRefreshing the Station List Creating a Pie Chart Creating a Graph or Meter Click mouse button 1 on KBytes Ring and Station VariablesGeneral ProtocolsAC Error Isolating ErrorsLine Errors Burst ErrorAbort Error Non-Isolating ErrorsInternal Error Frequency Errors Token ErrorsStatistics Ring and Station Variables About Ring Security Ring Security ConfigurationRing Security Configuration Launching the Security Configuration WindowSecurity Configuration Ring Selection window, -1, will appear Disallowed Count Allowed Station ListAllowed Count Disallowed Station ListDisable Security Security Mode OptionsEnable Security Allowed/Disallowed List Configuration Buttons Building the Allowed List Automatically Configuring SecurityStation Addition Window Deleting Stations from the Allowed or Disallowed ListsClear List Window Clearing All Entries in the Allowed or Disallowed ListRemove Changing the Ring Security ModeTrmmim MIB Structure Ietf MIB SupportNetwork One, Network Two Chassis MGRProtocol Stack Snmp AgentTelnet Brief Word About MIB Components and Community NamesTrmmim MIB Structure Index Index-2 Index-3 Index-4
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